(organic chemistry) The aldehyde acid CHO-COOH found in unripe fruit, and as a component of the glyoxylate cycle

(inorganic chemistry) The poisonous and explosive compound HN₃

(inorganic chemistry) The unstable compound HNO

(inorganic chemistry) The oxyacid of phosphorus H₄P₂O₆

fulminic acid

(biochemistry) An isomer of citric acid that is involved in the citric acid cycle

(organic chemistry) The isomer of phthalic acid benzene-1,3-dicarboxylic acid used in the synthesis of polymers.

(inorganic chemistry) Any of several oxyacids of boron having the general formula (HBO₂)ₙ.

(organic chemistry) Any of a range of compounds obtained by the nitration of coal, sometimes used as soil conditioners or in ion exchange

(chemistry) The hypothetical compound C(OH)₄ known only as its derivatives, the orthocarbonates