| Acetic acid | Found in vinegar |
| Amino acid | The basis of proteins |
| Ascorbic acid | Vitamin C |
| Carbolic acid or phenol | Used in disinfectant soap |
| Citric acid | Found in lemons and other citrus fruits |
| Deoxyribonucleic acid | DNA, the basis of chromosomes |
| Formic acid | Occurs naturally in ants |
| Hydrochloric acid | Found in dilute form in digestive juices |
| Lactic acid | Found in sour milk |
| Malic acid | Found in unripe apples and other fruit |
| Nitric acid | Corrosive acid used in explosives production and rocket fuels |
| Nitrohydrochloric acid | Used to dissolve platinum and gold and to test metals |
| Prussic acid / Hydrocyanic acid | Cyanide compound - a favourite poison in fiction |
| Ribonucleic acid | RNA, found in all living cells. Essential for protein production |
| Salicylic acid | Used as the basis for aspirin |
| Sulphuric acid | Dangerous and corrosive acid used widely in industry |
| Tannic acid | Found in tea and used in tanning and clarifying beer and wine |
| Tartaric acid | Used in baking powder |
| Uric acid | Cause, when unregulated, of gout. |
