Explanatory notes
… SALTS AND DERIVATIVES (1) Oxalic acid (HOOCCOOH). Fine crystals, colourless, transparent and odourless; toxic. Used … in organic synthesis. Its main salts are ammonium, potassium, sodium, calcium, iron and ammonium-iron oxalates. … diethyl oxalates. (2) Adipic acid (HOOC(CH 2 ) 4 COOH). Crystallises in colourless needles; used, inter alia , for …