Chemistry topics, F

School Science Experiments
2024-06-05

Chemistry, F
Contents
Fabrics, (burning tests), (Experiments)
Fabrics, (household), (Experiments)
Face cream, Prepare
Face shield
Fahrenheit scale
Faraday's first law, (Experiments)
Farnesene
Farnesol
Fats, (Experiments)
Febrifugine
Fehling's solution, (Experiments)
Feldspars, (Geology)
Fenchol
Fenchone
Fentanyl
Fermentation, (Experiments)
Fermium
Ferric compounds
Ferricyanides, (Experiments)
Ferrites
Ferritin
Ferrous compounds, (Experiments)
Fertilizers, plant, (Agriculture)
Fertility, soil, (Agriculture)
Ferulic acid
Feruloylputrescine
Fexofenadine
Fibre glass resin
Fibro Asbestos danger, (Geology)
Fibrous proteins. See 1.
Fibrous plaster
Ficin
Ficine
Fieldwork, Geology
"Fight or fright hormone", Adrenaline
Filament lamp, (Experiments)
"Fill water", (Swimming pools)
Fillers, (washing powders)
Filter funnels, (List)
Filters, (swimming pools)
Filtration, (Experiments)
Fingerprints, (ninhydrin), (Experiments)
Fingerprints, (iodine), (Experiments)
Fining wine
Fipronil, C12H4Cl2F6N4OS, Neonicotinoid insecticide
Fire Safety
Firming agents
FIRST AID, Poisons
Fisetin
Fish oils, Trans fats, (See: 6.)
Fish smell, (Trimethylamine)
Fisher projection formula, D-, L- glyceraldehyde
Fission, Uranium, (Geology)
Fixed oils
Fixing insects, Prepare
Fizzy drinks, Soft drinks
Flame retardants
Flame tests, (metals), (Experiments)
Flame tests, (salts), (Experiments)
Flammable, (Experiments)
Flash point
Flavonoids
Flavour
Flavoxanthin
Flaxseed oil, Composition of edible oils
Flocculation, (muddy water), (Experiments)
Flocculent, (bacteriology), (mining)
Froth flotation, (minerals), (Experiments)
Flour, (Experiments)
Flowers, (essences), (Experiments)
Flubendazole
Fluorescein, (Experiments)
Fluorescence, (Experiments)
Fluorspars, (Geology)
Fluorine, F, Fluorides
Flux, soldering, (Experiments)
femtomole, 1 femtomole = 10^-15 moles
Foam, (Polymer)
Foaming agents. (washing powders)
Foams, (Experiments)
Folic acid
Food, (Experiments)
Fool's gold, (pyrite, iron pyrite), (Geology)
Forgery, (detection), (Experiment)
Formaldehyde, (Experiments)
Formic acid
Formula, Group formula
Forskolin
Forsythiaside
Fracking
Fractions, (crude oil)
Fractional distillation, (crude oil), (Experiments)
Francium, Fr
Frangulanine
Fraxin
Free element metals
Freezing, (FP), , (Experiments)
"Freons", CFCs
Friedel-Crafts reaction
Friedelin
Froth flotation, (Geology)
Fructose, (Experiments)
Fruit salts, (Experiments)
Fuchsine, fuchsin, (Experiments)
Fucosterol, phytosterol
Fuels, fuel cell
Fuller's earth, (Geology)
Fumaric acid
Fume cupboards, fume hoods, (Safety)
Fumigants, (Agriculture)
Functional groups
Fungicides
Furanocoumarins
Furfural
Furfurol
Fusion mixture, (Experiments)

Falcarinol, C17H24O
Falcarinol, carotatoxin, panaxynol, long-chain fatty alcohol, metabolite, irritant, causes contact dermatitus, pesticide,
fungicide, in carrots (Daucus carota), in red ginseng (Panax ginseng), in ivy Hedera species

Fats
Fats in food
Burn carbohydrates, fats and proteins: 9.9.1
Classification of fats: 3.9.2
Cooking fats: 19.1.3
Digestibility of fats: 9.2.4
Heating fats: 3.9.7
Hydrogenation
Prepare soap: 12.9.0
Steam distillation to measure water and fat content of food: 10.3.11
Suet fat
Suet is solid fat around kidneys of cattle and sheep, to be melted to form tallow.
Suet pudding is made of suet + flour, wrapped in a cloth, then boiled.
Tallow fat
Tallow is hard fat formed from rendering suet.
It contains stearin, palmitin, olein, and is used for candles and soap.
Tests for fats and oils: 9.8.16
Tests for proportion of fats in foods: 9.8.13
Tests for fats and oils, Wijs' solution: 9.8.17
Tests for unsaturated fats, acidified potassium manganate (VII) solution: 9.8.33.1
Tests for unsaturated fats, bromine water test: 9.8.33.2

Fentanyl
Fentanyl, C22H28N2O, monocarboxylic acid amide, narcotic analgesic, strong and rapid opioid analgesic
An intravenous anaesthetic, it is used to treat chronic cancer pain or in anesthesia.
It has high potential for drug abuse then dependence, adulterant in illicit drugs, e.g. heroin. commonly involved in opioid overdose deaths.

Fermentation
Alcoholic fermentation, yeast 9.1.1
Butyric acid fermentation (cut potato) 9.1.2
Carbon dioxide and fermentation for brewing 3.8.0
Glucose fermentation 9.1.4
Fermentation 4.1.9 (Safety)
Safety in the microbiology laboratory 4.1.12
Triple scale wine hydrometer 10.2.8

Fermium, Fm
Fermium, Table of the Elements
Fermium, RSC
Fermium, Fm, (Enrico Fermi, 1901-1954, Italy), radioactive actinide element, produced by bombarding plutonium with neutrons, called Fermium in 1952

Ferric compounds, iron(III), Fe3+
Ferric ammonium sulfate (FAS), iron alum, ammonium iron (III) sulfate, NH4Fe(SO4)2·12 H2O
Ferric citrate trihydrate, C6H11FeO10, iron(III) citrate trihydrate, orange-red, (ferric + citric acid complexes) Ferric orthophosphate, iron phosphate, FeH2O5P, iron (III) phosphate hydrate, used to kill snails
Ferric alum, K2SO4.Fe2(SO4)3.24H2O
Ferric hydroxide colloid 7.8.9, (Experiment)
Ferric sulfate, iron (III) sulfate, Fe2(SO4)3.(H2O)n, (ferric sulphate).
It is used at more than 600 of England's wastewater treatment sites to remove phosphorus,
which can have a devastating effect on river life if discharged long with wastewater.
Prepare ferric tannate with tea leaves 9.1.8, (Experiment)

Ferrous compounds
"Ferrous ammonium sulfate", Mohr's salt Iron ammonium sulfate
Ferrous ammonium phosphate, (FAP), is used for iron fortification of foods.

Ferricyanide, Ferricyanide ion, [Fe(CN)6]3−
Ferricyanide ion, [Fe(CN)6]3−, hexacyanoferrate(III), e.g. potassium ferricyanide, K3[Fe(CN)6]
Ferrocyanide ion, [Fe(CN)6]4−, e.g. potassium ferrocyanide, K4Fe(CN)6
Ferrocyanides, [Fe(CN)6]^4-, hazards 3.7.6
Blueprints and diazo prints 2.2.1
Decomposition of ferricyanides 3.7.7
Ferricyanides, hazards 3.7.5
Ferrocyanides, hazards 3.7.6
Potassium ferricyanide, K3Fe(CN)6
Prepare crystal blossoms 3.1.2, Prussian blue
Prussian blue, iron (III) ferrocyanide
Prussian blue as a semipermeable membrane 9.1.8
Reactions of iron (II) salts and iron (III) salts, Prussian blue 14.8.1 (See 3.)
Tests for glucose concentration, ferricyanide test 19.1.27

Ferrites
A ferrite compound is made by heating iron (III) oxide + metallic elements.
They can be used to make permanent magnets or ferrite cores for microwave devices, e.g. MnZn ferrites.
Also an allotrope of pure iron is called a ferrite.

Ferritin, NCBI Gene 2512, Symbol FTL
Ferritin is a protein produced in mammalian metabolism which serves to store iron in the tissues.
Gene 2512 encodes the light subunit of the ferritin protein.
Ferritin is the major intracellular iron storage protein in prokaryotes and eukaryotes, is composed of 24 subunits of the heavy and light ferritin chains.
Variation in ferritin subunit composition may affect the rates of iron uptake and release in different tissues.
A major function of ferritin is the storage of iron in a soluble and nontoxic state.
Defects in this light chain ferritin gene are associated with several neurodegenerative diseases and hyperferritinemia-cataract syndrome.
The FTL gene provides instructions for making the ferritin light chain, which is one part (subunit) of a protein called ferritin.
Ferritin is made up of 24 subunits formed into a hollow spherical molecule.
The 24 subunits consist of numbers of the ferritin light chain and another subunit called the ferritin heavy chain, produced from another gene.
The proportion of the two subunits varies in different tissues.
Ferritin stores and releases iron in cells, with each ferritin molecule holdin up to 4, 500 iron atoms inside its spherical structure.
This storage capacity allows ferritin to regulate the amount of iron in cells and tissues, and the iron is needed for the body to produce red blood cells.

Fexofenadine
Fexofenadine, C32H39NO4, anti-histamine compound, which is used to treat allergic symptoms.
It occurs in Bergamottin
Bergamottin, (C21H22O4), in grapefruit interferes with the action of drugs, e.g. Atorvastatin,("Lipitor"), to lower bad cholesterol, by blocking the action of enzymes
in the small intestine to increase the amount of drug absorbed and the action of fexofenadine.

Ficin
Ficus protease; Higueroxyl delabarre, CH2FI2N, sulfhydryl proteinase, from ficus latex, It is used in alcoholic beverages, beer chillproofing agent, meat tenderiser, dough conditioner, rennet substitute, precooked cereals
Ficain (or ficin) is an enzyme which is derived from figs latex, an endopeptidase, used for differentiating many blood group antigens.

Fire Safety
Action in case of fire, evacuation 3.5.2
Action in case of fire, equipment 3.5.3
Face shields, Safety face shields
Fire blankets, Safety blankets
Fire extinguisher
Fire safety and fire equipment 3.5.0
Fireproof, Asbestos 35.2.4, (Geology)
Fireproof, cloth, paper, wood 3.5.10
Fireproof, Talc 35.3.13, (Geology)
Flammable

Fire extinguisher
Fire extinguishers
Fire extinguisher, dry chemical powder, paper, wood, textile, oil, liquid and electrical fires, 2.5 kg, 4.5 kg
Fire extinguisher, soda acid fire extinguisher 3.3.1H
Fire extinguisher cart, water stream impulse 17.7.5

Feruloylputrescine, C14H20N2O3
Feruloylputrescine, (originally called Subaphylline), a methoxycinnamamide, (derived from enimidic acid).
It occurs in leaves and juice of grapefruit, Citrus paradisi, in Salsola subaphylla

Flammable
FLAM, designates something that can readily burn or catch fire.
Flammable aerosols: 2.3
Flammable gases: 3.5.11
Flammable liquids: 3.5.12
Flammable solids: 2.7
Flammable substances: 3.5.13
Storing flammable liquids 3.7.5
1. The word "flammable" means "easily set on fire".
You can use "non-flammable", but in chemistry do not use "inflammable".
Flammability, explosion, limits outer limits for the ratio of fuel to air within which the mixture will burn.
The mishandling of flammable solvents has probably caused fires and personal injuries in chemical laboratories, e.g. burning of loose long hair.
Staff and students must have securely fixed and contained hair by tying back the hair or using caps or hair nets.
Flammable solvents become more difficult to ignite as their boiling points rise, so use the highest boiling point solvent possible.
Do not use water baths to heat volatile flammable solvents.
Solvents should only be used by staff with students after assessment of the risks, including flammability, toxicity, and possible allergic reactions.
2. Carbon disulfide has a greater flammability than ether and forms more dense vapours, with a low ignition temperature < 100^oC.
Carbon disulfide is not permitted in schools.
3. Diethyl ether evaporates readily to form a heavy vapour in air, which can travel along the bench or floor in an air current.
Diethyl ether is not permitted in schools.
4. Hydrogen forms violently explosive mixtures with air in almost any proportions and spontaneously combusts at concentrations greater than 4% in air.
Use this gas for demonstration purposes only in extremely small quantities or use soap bubble techniques.
5. Natural gas forms explosive mixtures with air, so turn off heaters, Bunsen burners, and equipment using natural gas and other flammable gases, e.g. acetylene.
6. Methylated spirit, ethanol and hydrocarbon solvents, e.g. petroleum spirit, hexane, pose the greatest risk in schools.
Mixtures of air with any of these materials are highly flammable, and ignition of vapour is usually followed by a fire in or around the solvent container.

Flavonoids
Flavonoids have a basic skeleton, C6-C3-C6, and can divided three groups.
Group 1. Bioflavonoids
Flavones, (Apigenin, Baicalein, Luteolin, Nobiletin, Sinensetin, Tageretin)
Flavonols, most common, flavonoids, (Hesperetin. Icariin, Kaempferol, Myricetin , Naringenin, Quercitin)
Flavonones, (Hesperidin, Naringin)
Flavan-3-ols/Catechins, many in green tea, (Catechin, Epigallocatechin, Epicatechin, Gallate)
Anthocyanidins, (Cyanidin, Delphinidin, Malvidin, Pelargonidin, Peonidin, Petunidin)
Chalcones, (Arbutin, Chalconaringenin, Phloretin)
Group 2. iso-flavonoids, Isoflavones, (Daidzein, Genistein)
Group 3. neo-flavonoids, (Dalbergin, Latifolin)

* Anthocyanins: Anthocyanins
* Flavanols: Flavan-3-ols, (Flavanols)
* Flavanones: Flavanones
* Flavones: Flavones
* Flavans: Flavans
* Isoflavones: Isoflavones
* Isoflavonoids: Isoflavonoids

Flavonoids
Flavonoids
Polyphenol flavonoids
Catechol
| Geosmin
| Chrysoeriol
| EGC Epigallocatechin
| Kaempferol
| Luteolin
| Naringin
| Quercetin
| Rutin
Tangeritin
Proanthocyanidin, (Polyphenol), Flavonoid
Proanthocyanidin, rotenone, pisatin, isoflavan, pisatin, proanthocyanidins, orcein, vulpinic acid, taxol, urushiol
psoralen), (flavone alkaloids: ficine, vochysine)
See: Vestitol.
Flavonoids.
Fisetin.
Galangin.
Isorhamnetin.
Myricetin.

Flavanones
Butin
Eriodictyol, C15H12O6, in lemons, Flavanone
Hesperetin, C16H14O6, in lemon, orange
Hesperidin, (aglycone hesperetin)
Naringenin
Naringin
Narirutin, C27H32O14, flavanone-7-0-glycoside, Flavanone Glycoside, in Orange juice
Poncirin
Silibinin
Sinensetin

Isoflavones
Isoflavones, C15H10O2, almost only in Fabaceae, oestrogenic activity, e.g. Psoralea
Isoflavones, related to isoflavonoids, phytestrogens and antioxidants, soy isoflavones may prevent breast cancer, only in legumes.
In soybeans, pistachios
Astragaloside 4, C41H68O14, anti-inflammatory, in Astragali radix

Flavones, condensed tannins)
Flavone, (2-Phenylchromone), C15H10O2, the simplest member of the class of flavones
It occurs in Camellia sinensis, and Anaphalis lactea
Flavones Acacetin
Apigenin
Baicalein
Chrysin
Diosmetin
Herbacetin
Luteolin
Sinensetin
Tangeritin

Flavan-3-ols (Flavanols)
Subgroup of Flavonoids, e.g. Catechin, C15H14O6, occurs in chocolate, cinnamon, red wine
1. Flavan-3-ols, flavanols (NOT "Flavonols"!)
They occur in fruits and vegetables, e.g. apples, apricots, berries, cherries, grapes, nectarines, peaches, pears, plums, Swiss chard
They occur in nuts, e.g. almonds, cashews, hazelnuts, pecans and pistachios
They occur in green, black and oolong teas, cacao, red and white wine
Catechin
Epicatechin, (EC), Flavonoid
ECG Epicatechin gallate (ECG), Flavonoid
Epigallocatechin (EGC), bioflavonoid
Epigallocatechin gallate (EGCG), bioflavonoid
Catechol
2. Flavan-4-ols
Apiforol, C15H14O4
3. Flavan-3.4.diols, Leucanthocyanidins,
Leucanthocyanidin, C15H14O3, from enzymes, in many plants, e.g. Zea mays
Rutin hydrate, C27H30O16.xH2O, poly flavonoid
4. Theaflavins (TF), antioxidant polyphenols, (from flavan-3-ols during tea leaves "fermentation")
| Theaflavin, C29H24O12 | Theaflavin-3-gallate, Theaflavin 3, C43H32O20 | Theaflavin 3,3'-di-O-gallate, C43H32O20 |

Flavans
Flavans
Flavans, Benzopyran derivatives, 2-phenyl-3,4-dihydro-2H-chromene skeleton, (leucoanthocyanidin)
A C-glycosidic from cocoa liquor.
Casuarina glauca is an actinorhizal plant producing root nitrogen-fixing nodules infested by Frankia, containing flavans.
Flavan-3-ols (Flavanols), subgroup of Flavonoids, derivatives of Flavans
1. Flavanols (NOT "Flavonols"!)
Occurs in fruits and vegetables, e.g. apples, apricots, berries, cherries, grapes, nectarines, peaches, pears, plums, Swiss chard.
Occurs in nuts, e.g. almonds, cashews, hazelnuts, pecans and pistachios.
Occurs in green, black and oolong teas, cacao, red and white wine.
Catechin
Epicatechin, (EC), Flavonoid
ECG Epicatechin gallate (ECG), Flavonoid
Epigallocatechin (EGC), bioflavonoid
Epigallocatechin gallate (EGCG), bioflavonoid
Catechol, C6H6O2, a phenol
Leucanthocyanidin, C15H14O3, from enzymes, occurs in many plants, e.g. Zea mays

Flavonols
3-Hydroxyflavone, Axaleatin, Azaleatin, Fisetin, Galangin, Glepidotin, Gossypetin, Isorhamnetin, Kaempferide, Morin, Myricetin, Natsudaidain
Kaempferol Quercetin Rutin. glycoside, flavonol quercetin + disaccharide rutinose
O-methylated Flavonols: Pachypodol Rhamnetin | Rhamnazin

Flocculent
A flocculent is usually a precipitate in cloud-like tufts, flocs
In bacteriology, flocculation refers to the formation of floccules, (agglutinated bacteria), in a precipitin test, especially for antigens of Salmonella.
In mining, flocculation refers to coagulation of ore particles to form flocs and to remove excess water.

Flour
Flour treatment agents, food additives 19.4.17
Experiments
Prepare flour glue 9.1.1
Prepare self-leavened flour, "self-raising flour" 19.1.8.1
Prepare wallpaper paste 9.1.3
Use flour to make play dough 19.1.8.2
Use flour to make glue 19.1.8.3
Use flour to make papier-mâché
Use flour to clean brass and copper

Fluorescence, fluorescein, fluorescence microscopy
Fluorescent minerals absorb ultraviolet light and emit longer wavelength visible light, e.g. scheelite.
Fluorescence is luminescence that does not persist when the exciting cause is removed, e.g. a fluorescent light.
The rapid emission of light at longer wavelengths than that which is absorbed, e.g. adsorption of ultraviolet light can yield blue fluorescence.
Certain excited atoms emit a photon of lower energy than the incident photon that caused the transition.
If the process takes place rapidly, < 10^-7 seconds, it is called fluorescence.
Experiment
Use a 1 500 alcoholic solution of eosin to demonstrate fluorescence
Fluorescence
6.5.22 Chlorophyll fluorescence
28.6.2 Critical angle in ripple tank, refraction tank, aquarium (fluorescein)
16.3.5.4 Fluorescein
3.34 Fluorescence staining of cells and tissues
38.8.3 Fluorescent lamp (Electronics)
16.3.5.0 Fluorescent liquids
12.12.03.3a Fluorescent whitening agents, synthetic detergents (syndets)
14.3.0a Fluorophores
Luminescence
Merbromin + dark red fluorescein
Phosphorescence
3.7.13 Polychlorinated biphenyls. PCBs
Prepare Bakelite plastic 3.4.9
Prepare fluorescein solution 1.5
12.19.9.1 Reactions of bromine, Br2 (See 3.)
12.19.9.4 Reactions of hydrogen bromide, HBr, (See 7.)
28.5.2 Refraction tank, ripple tank, aquarium
16.1.3.2.4 Resorcinol
35.20.38 Scheelite, calcium tungstate, CaWO4, (Geology)
27.24 Ultraviolet rays
9.13.2 Water flask model of the eye
7.9.56.1 Xanthene dyes, Fluorescein

Flubendazole
Flubendazole, C16H12FN3O3, is used in human and veterinary medicine for nematode infections.

Fluorine, F, Fluorides
See Fluorine, RSC
See Fluorine, Table of the Elements
Fluorspar, CaF2 35.2.32, (Geology)
Calcium fluoride, calcium fluorite, fluospar, Harmful if ingested
Fluorine, F, (Latin fluere to flow), very reactive, halogen, pale yellow gas
Fluorine is a naturally occurring element, in fluorspar, CaF₂.
It is a yellow-green gas, strong, sharp odour (like pool chlorine), combines with hydrogen to form hydrogen fluoride.
Fluorine gas can cause irritation, muscle spasms, harm the lungs and heart and cause death.
It is a non-metal yellow-green poisonous gas at room temperature and pressure.
Fluorine is the most reactive corrosive and electronegative of all elements.
It never occurs as a free gas, but it occurs in many silicate minerals and the mineral fluorite, CaF₂.
Fluorine is the most electronegative non-metallic element, strong oxidizing agent.
Fluorine combines with carbon to form inert polymers, e.g. Teflon coated frying pans, and form low friction fluorocarbon polymers, e.g. PYFE.
'Freon'
'Freon' is the brand name for the refrigerant, CCl2F2, Dichlorodifluoromethane (R-12), a colorless gas usually sold under the brand name "Freon-12"
In Australia. the Pharmacist only medicine "NeutraFluor 5000 Plus", Colgate, contains sodium fluoride 11.05 mg/g.
However, some natural water sources already contain the fluoride ion.
The enamel of teeth are formed from the crystalline mineral hydroxyapatite, Ca₁₀(PO₄)₆(OH)₂.
Fluorine is used to make CFCs, chlorofluorocarbons, freon, that damages the ozone layer.
Fluorine compounds are added to toothpaste and drinking water, e.g. tin (II) fluoride, sodium monofluorophosphate (MFP), sodium fluoride and amine fluorides.
In some countries, sodium fluoride is added to drinking water to improve the hardness of tooth enamel apatite of children's teeth.
However, some people believe that sodium fluoride is too reactive to be put into drinking water and it may cause discoloration of teeth.
In Australia solid sodium silicofluoride is added to drinking water in some places.
However, some natural water sources already contain the fluoride ion.
The enamel of teeth are formed from the crystalline mineral hydroxyapatite, Ca₁₀(PO₄)₆(OH)₂.
Boron trifluoride, BF3, colourless, pungent, toxic gas, white smoke in moist air
Emitters of fluoride are metal cleaning operations, glass and enamel manufacturing and glazing, toothpaste, and fluoride enhanced water.
These emissions may be to the soil, water, or air.
Fluorourcil, C4H3FN2O2, 5-fluorourcil, cancer drug, Toxic by all routes, Not permitted in schools
Fluoride compounds all contain fluorine.
Fluorine is found in nature as part of the mineral fluorspar.
Fluoride (fluorido), F-, monodentate ligand
SPADNS fluoride reagent solution, 500 mL, (HO)2(C10H3(SO3Na)2N=N(C6H4SO3Na, indicator for zirconium and thorium
Fluorides
Cryolite, sodium aluminium fluoride 35.20.13, (Geology)
Elements in the Earth's crust, abundance of elements 36.3.01
Fluorspar, CaF2 35.20.14, (Geology)
Hydrofluoric acid, HF, Not permitted in schools 12.19.7.0
Potassium fluoride, KF, corrodes glass
Perfluorooctanoic acid, PFOA 16.14.2
Sodium fluoride
Fluorine compounds
12.19.5.0 Freons, CFCs, chlorofluorocarbons, "Freons"
16.14.2 PFOA, perfluorooctanoic acid, CF3(CF2)6COOH, Teflon^TM
16.14.3 PFOS, perfluorooctane sulfonate, perfluorooctanesulfonic acid, C8HF17O3S
Experiments
Prepare hydrogen fluoride, HF 12.19.7.1
Prepare silicon tetrafluoride, SiF4 12.19.7.2
Fluoridated toothpaste 9.226

Folic acid
Folic acid, C19H19N7O6, PteGlu, Pteroyl-L-glutamic acid, Vitamin M, "folate", "Vitamin B9", odourless orange-yellow needles.
It is an N-acyl-amino acid, a form of the water-soluble vitamin B9, which is essential for nucleotide biosynthesis.
It is an important component of diet during phases of rapid cell division, e.g. infancy and pregnancy, and protects against cancer.
It occurs in green vegetables, avocado, and citrus fruits
Folic acid derivative, tetrahydrofolic acid, C19H23N7O6, assists metabolism of amino acids and nucleic acids.

Food
Cooking 19.2.0
Food acids, acids in foods: 19.1.5
Food additives 19.1.0
Food allergies and intolerances, "hyperactive" 19.2.0
Food colouring liquids and detergent 16.3.4, (Experiments)
Food molecules 16.7.0
Food preservation 19.2.0
Food tests, tests for food 9.8.0, (Experiments)
Food used in plant respiration 9.160, (Experiments)
Glycaemic index (GI) 9.242
Electrophoresis, food dyes, marking pen ink 19.4.2, (Experiments)
Elements in food 19.4.3, (Experiments)
Different kinds of food 2.34 (Primary), (Experiments)
Digestion of food 5.20 (Primary), (Experiments)
Heat different foods 9.128, (Experiments)
Heat of combustion, bomb calorimeter, energy values of food 22.5.7, (Experiments)
Micro-organisms and food spoilage 4.3.18, (Experiments)
Prepare food, using microbiology 4.2.2, (Experiments)

19.1.5 Food acids, acids in foods
Ethanoic acid, acetic acid, vinegar
Benzoic acid, in cranberries, prunes and plums
Butyric acid, in decomposition of butter, rancid butter
Citric acid, C6H8O7, in citrus fruits, lemon, orange, cocoa, pepper, rhubarb
Tannic acid in tea
Tartaric acid in grapes, pineapples, potatoes, carrots.

Formaldehyde, CH2O
Formaldehyde solution, methanal, formalin, Toxic by all routes, Corrosive (use < 2 mL only)
Formaldehyde, Solution < 1%, Not hazardous
Formalin, 40% solution of formaldehyde in water, forms toxic fumes
Formalin, paraform, methylene glycol, methyl aldehyde
Formalin, 40% solution of formaldehyde in water
FAA, (formalin, acetic acid, alcohol), biology fixative, for plant material 4.3
Formal saline, para formaldehyde 4.5
Formalin, biology fixative 4.4
Formaldehyde, formalin, biology fixative for animal material 4.4
Formaldehyde, Indoor air pollution 18.6.0.2
Formaldehyde may contain 10-15% ethanol to prevent polymerization
Formaldehyde with hydrochloric acid may form carcinogenic bis(chloromethyl) ether
Prepare formaldehyde-acetic acid alcohol 4.3
Prepare formaldehyde-resorcinol resin 3.4.6.1
Prepare urea-formaldehyde resin 3.101
Urea-formaldehyde, (urea-methanal), resin, thermoset plastic 3.8.11
Formaldehyde solution
Formaldehyde solution, HCHO, CH2O (aq), gas readily soluble in water, methanal (+10% methanol), formalin 40% methanal solution
Do NOT mix with HCl, because carcinogenic bis(chloromethyl) ether may form, so do NOT dispose formaldehyde and HCl in the same sink.
ACS reagent, 37 wt % in H2O, contains 10-15% methanol as stabilizer, (to prevent polymerization).
Formaldehyde, (methanal), is highly poisonous and probably carcinogenic and should be handled with extreme care.
Formaldehyde is transported and stored as a concentrated aqueous solution called "formalin".
When a bottle of formaldehyde is opened, a large amount of gas may be released, but do NOT inhale the formaldehyde gas.
Do experiments with concentrated formaldehyde solutions in a fume cupboard.
However, dilute formaldehyde solutions produce little formaldehyde and can be safely handled in the open laboratory.
Preserve biological specimens in a solution of 50% ethanol and 50% water, instead of formaldehyde solution.
Do not mix hydrochloric acid and formaldehyde solution, because highly carcinogenic bis(chloromethyl) ether may form.
Do NOT store bottles of hydrochloric acid near formaldehyde, because the reaction might occur in the air.
Do NOT dispose of formaldehyde solutions and hydrochloric acid in the same sink system.

Formic acid, CH2O2
Formic acid, CH2O2, HCOOH, methanoic acid, Toxic by all routes, Corrosive, lung irritant
Formic acid, (in insect stings, ants)
Formic acid, Solution < 2%, Not hazardous
Methanoic acid, ionization reaction 16.2.7
Formic acid
Formic acid, HCOOH, methanoic acid, conc 46 M, hydrogen carboxylic acid, in ants and stinging nettles, most simple carboxylic acid
Formic acid is highly poisonous and should be treated with care.
It is highly volatile and the vapour should NOT be inhaled.
Formic acid, the only simple aliphatic carboxylic acid to possess reducing properties, because of the presence of a (-CHO) component in the molecular structure.
Formic acid is both an aldehyde and a carboxylic acid.
HCOOH + H2O <--> H3O⁺ + HCOO^-, Ka = 1.8 × 10^-4

Forsythiaside A, C29H36O15
Forsythiaside A, is a hydroxycinnamic acid
Forsythia, used to treat swelling of small air passages in the lung, inflammation and fever.
However, the mechanism is not known.

Francium, Fr
Francium , Table of the Elements
Francium, RSC
Francium, Fr (France), radioactive, heaviest alkali metal element, from uranium ore decay.
It was the last "natural" element, discovered by Marguerite Percy, France, in 1939
Francium exists only as compounds, very rare, disintegration product of actinium, MP 300.15 K.

Friedelin, C30H50O
Friedelin, fredelanone, friedooleanan-3-one, a pentacyclic triterpenoid, anti-inflammatory drug, a non-narcotic analgesic, diuretic, antipyretic.
It occurs in Ceratopetalum, main triterpenoid in cork Quercus suber

Fuchsine . C20H19N3.HCl
Fuchsine, Fuchsin, rosaniline hydrochloride, magenta dye, brilliant red aniline dye is derived from coal tar.
Fuchsine acid, Andrade's acid fuchsin indicator 1.0
Fuchsine basic, basic fuchsine (CI 42510), Toxic
Calberla's pollen stain 7.11
Magenta 27.196
Fuchsine
Fuchsine, (fuchsin), rosaniline hydrochloride, C20H19N3.HCl, triphenylmethane dyestuff, magenta dye, dark green crystals
In water forms a purple red solution, (the colour of flowers of Fuchsia, Onagraceae), It is used as a disinfectant for skin infections and to stain bacteria.
Basic fuchsine has variable contents including rosaniline and similar compounds, used in Schiff's reagent test for aldehydes.
Acid fuchsine is mixture of basic fuchsine + sulfonic groups to decolorize it.
Fuchsine (fuchsin) is sold as:
1. Basic Fuchsin, C19H17N3.HCl, dye, Basic Parafuchsin, Basic Red 9, Magenta O, Parafuchsin hydrochloride,, Pararosaniline hydrochloride
2. Basic Fuchsin, C20H20ClN3, for microscopy, indicator (pH 1.0-3.1), Basic Violet 14, Fuchsin basic, Magenta, Rosaniline
3. Acid Fuchsin, C20H17N3Na2O9S3, for tissue staining, Acid Violet 19, Fuchsin S, Fuchsin acid, RubineS

Fucosterol, C29H48O
Fucosterol, Isofucosterol, Delta 5-avenasterol, phytosterol, associated with phytosterolemia an inborn error of metabolism, in brown algae in coconut

Fuels
Fuel cell 7.9.28
Biofuels
Biogas, (Safety)
Recommended maximum quantity of fuel to be stored in a schoolbr> 1. Oil and grease 40 L, clean oil contains irritants, used oil contains contaminants, use gloves and eye protection with grease
2. Petroleum, Petrol (gasoline), highly flammable
3. Diesel 20 L, toxic fumes, irritates skin and eyes
4. Two stroke petrol mix, toxic fumes, irritates
5. Kerosene, 5 L, toxic fumes, irritates skin and eyes
Calorific value of fuel, heat transfer
4.38 Calorific value of fuel
Motor vehicle ignition system, primary circuit 32.5.5.1
Petroleum
Fuel cell
A fuel cell is a device with a cathode and anode, which converts a fuel directly into electricity without burning.
The simplest case is hydrogen gas bubbled over a porous sintered nickel anode in alkali solution,
and oxygen is bubbled over a similar cathode separated by a porous membrane.
An electric current is produced in an external circuit.
A fuel cell is like a battery, except that fuels, e.g. methanol, rather than metals are consumed, and the reaction is not reversible.

Biofuels
A biofuel is a fuel derived from renewable plant or animal material, (feedstocks), unlike fossil fuels, e.g. coal, natural gas, petroleum.
Solid biofuels include grass and wood, which can release heat when burnt.
First generation biofuels are produced from mostly plant-based starch, sugars and oils.
Sugar from sugarcane, sorghum and maize can be fermented into ethanol, which can be used as a motor fuel
Oil extracted from oil-seed crops, e.g. canola, soybean, oil palm, coconut, restaurant waste and animal-based tallow can be converted into biodiesel.
Second generation biofuels use lower-value biomass residues, from forestry, agriculture, municipal solid wastes or dedicated energy crops.
Biomass can be turned into biofuels through different processes.
Biochemical processes produce fermentable sugars from cellulose, as in paper.
Pyrolysis, in which organic material is decomposed at high temperatures without oxygen.
Algal oil production from large scale open ponds or closed algal photobioreactors.
Biogas, produced by wastes in an anaerobic digester, consists mainly of methane and carbon dioxide
Biomass is very resistant to breaking down, because the plant has to be pretreated to break open its fibre structure and access the sugars in cell walls.
Enzymes can be used to convert cellulose into glucose.
Questions
1. What is the the environmental impacts of growing the initial crop for the lower-value biomass residues? 2. Is more energy produced and taken ou than put in to growing the crop and producting the fuel?
3. What are the the greenhouse gas reduction benefits of the fuel, which takes the place of the fossil fuels?

Functional groups
Functional group See diagram 16.0.0
1. Alcohols, 2. Aldehydes, 3. Amines and Amides, 4. Carboxylic acids, 5. Cyclic compounds, 6. Esters, 7. Ethers, 8. Halogens (Alkyl Halides),
9. Ketones R = alkyl group
1. Alcohols, R-OH, -OH hydroxyl, Prefix hydroxy-, Suffix -ol (-OH alcohol) (alkanol, alkyl alcohol)
Multiple -OH groups suffixes -diol, -triol, -tetraol, e.g ethylene glycol = ethane-1, 2-diol, CH2OHCH2OH
2. Aldehyde, R-CH=O, Prefix formyl-, Suffix -al
Cyclic aldehydes, Prefix formyl-, Suffix -carbaldehyde, attached to benzene benzaldehyde
3. Amines and Amides
Amines R-NH2, Prefix amino-, Suffix -amine
Primary amine, R1NH2, Secondary amine, R1NHR2, Tertiary amine, R1NR2R3, e.g trimethylamine
Amide, RCONH2, (amine + acid), No prefix, Suffix -oic, amide, e.g, acetamide = ethanamide, CH3CONH2
R-C(=O)NR'R', Prefix carbamoyl, NH2CO, Suffix -carboxamide, RCONH2)
4. Carboxylic acids, RCOOH, Prefix carboxy-, Suffix -oic acid, Multiple dicarboxylic acid, tricarboxylic acid
6. Esters, RCOOR', Prefix R-oxycarbonyl-, Suffix -alkyl, -oate, e.g. methyl formate = methyl ethanoate, HCOOCH3, (but "ethyl acetate", keeping old name)
7. Ethers, ROR', (Alcohol names), -ether, Prefix -oxy-, e.g, dimethyl ether = methoxymethane, CH3OCH3
8. Halogens, (Alkyl halides), R-X, Prefixes fluoro-, bromo-, chloro-, dichloro-, trichloro-, iodo-, e.g chloroform, trichloromethane, CHCl3
Haloalkanes, halogenalkanes, alkyl halides, e.g. Acyl chloride, acid chloride, RCOCl, functional group -CO-Cl
Prefix halo-, formyl-, Suffix -oyl halide, e.g. chlorofluorocarbons, CFCs
9. Ketones, RCOR', keto-, -one, e.g. acetone = propan-2-one, C=OH2, Prefix oxo-, Suffix -one

Furfural,
Furfural, C5H4O2, (2-Furaldehyde), furan-2-carbaldehyde, acute toxic, irritant, health hazard, a heterocyclic aldehyde, , A colourless or red-brown oily liquid, penetrating odour, denser than water, soluble in water, toxic by ingestion, skin absorption or inhalation, almond smell.
It thermosets easily and resists corrosion.
It occurs in wheat bran, maize bran, vanilla, cinnamon and is a Maillard reaction product.
Also, it occurs in the peels of ripe Carica papaya (Papaya) and Ananas comosus (Pineapple) fruits show high yield of furfural.

Furfurol,
Furfurol, C5H6O2, furfuryl alcohol, (2-Furanmethanol), primary alcohol, acute toxic, irritant, health hazard, clear colourless liquid, denser than water
It irritates skin, eyes and mucous membranes, toxic by ingestion and skin contact
It occurs in Perilla frutescens, and Zea mays.