(organic chemistry) The brominated derivative of acetic acid CH₂Br-COOH that is used in the synthesis of pharmaceuticals etc.

(inorganic chemistry) The unstable oxyacid of bromine HBrO₂

(organic chemistry) crotonic acid

(organic chemistry) The chemical compound with the formula CH₃(CH₂)₂COOH, a short chain fatty acid; its glyceride is one of the principle components of the flavour of butter.

(organic chemistry) The chlorinated derivative of acetic acid CH₂Cl-COOH that is used in organic synthesis

(organic chemistry) The chlorinated derivative of formic acid, Cl-COOH, known principally through its esters, the chloroformates

(inorganic chemistry) The strong acid ClSO₂OH obtained from sulfuric acid by the replacement of a hydroxyl group with a chlorine atom; it is used in the preparation of sulfonic acids

(inorganic chemistry) The unstable and reactive acid, ClSO₂OH used in the manufacture of many organic compounds

(organic chemistry) The monoterpenoid carboxylic acid formed by the oxidation of citronellal

(organic chemistry) The cyano derivative of acetic acid NC-CH₂-COOH used in the synthesis of barbiturates and other compounds