(inorganic chemistry) A strong acid made by dissolving the gas, hydrogen chloride, in water. It reacts with alkalis, bases and many metals to form chlorides; it has many industrial applications.

(organic chemistry) A very-long-chain saturated fatty acid, CH₃(CH₂)₂₄COOH, found in beeswax and carnauba wax.

(organic chemistry) 2-methyl-propanoic acid, (CH₃)₂CHCOOH, an isomer of butyric acid, that occurs in carob beans and croton oil.

(inorganic chemistry) A corrosive colourless liquid, HBrO₃; it is a powerful oxidizing agent, and is used in the manufacture of pharmaceuticals and some dyes; it reacts with bases to form bromates.

(organic chemistry) A fatty acid, CH₃(CH₂)₆COOH, obtained from butter and other animal fats, and used in the manufacture of perfumes and flavours.

(chemistry) a strong acid, HClO₃, known only in solution and as its chlorate salts; a powerful oxidizing agent

(organic chemistry) amino-formic acid, NH₂COOH; it is too unstable to have been isolated, but its esters and salts are known.

(chemistry) Any compound, of general formula HXⁿ⁺, which can be transformed into a conjugate base X⁽ⁿ⁻¹⁾⁺ by the loss of a proton.

(organic chemistry) A colourless crystalline compound, 2-hydroxy-1,2,3-propanetricarboxylic acid, C₆H₈O₇, found in citrus fruit; it is used as a food additive and in the manufacture of citrates.

(inorganic chemistry) A transparent, colourless to pale yellow, fuming corrosive liquid, HNO₃; a highly reactive oxidizing agent used in the production of fertilizers, explosives, and rocket fuels and in a wide variety of industrial processes; once called aqua fortis.