(organic chemistry) Any of three isomeric aromatic organic benzenedicarboxylic acids, C₆H₄(COOH)₂; especially the ortho- isomer manufactured from naphthalene, used in the synthesis of dyes, perfumes and other compounds.

(chemistry) a solid white acid, H₂SeO₄, having the same structure and similar reactions as sulphuric acid

(organic chemistry) an aliphatic dicarboxylic acid, (CH₂)₆(COOH)₂, obtained from cork; used in the manufacture of plastics

(chemistry) a strong inorganic acid, HSO₂OH / (chemistry) the univalent functional group -SO₂OH

(organic chemistry) A crystalline unsaturated hydroxy fatty acid C₁₈H₃₄O₃ that yields esters important as plasticizers and whose glyceride (ricinolein) is the main component of castor oil.

(organic chemistry, biochemistry) A yellowish organic keto acid, 2-oxopropanoic acid, which occurs as an intermediate in many metabolic processes, especially glycolysis.

(organic chemistry) an aliphatic dicarboxylic acid, (CH₂)₈(COOH)₂, originally prepared from tallow; it is used in the manufacture of resins, plasticizers and polyester rubbers

(chemistry) a weak acid, either of two hydrated forms of titanium dioxide, H₂TiO₃ or H₄TiO₄; used as a mordant

(chemistry) dihydroxycinnamic acid, obtained from certain umbelliferous plants

(chemistry) Any of a class of aliphatic carboxylic acids, of general formula CₙH₂ₙ₊₁COOH, that occur combined with glycerol as animal or vegetable oils and fats. Only those with an even number of carbon atoms are normally found in natural fats.