Unsaturated acyclic monocarboxylic acids, their anhydrides, halides, peroxides, peroxyacids and halogenated, sulphonated, nitrated or nitrosated derivatives (excl. acrylic acid and its salts and esters, methacrylic acid and its salts and esters, and oleic, linoleic or linolenic acids, their salts and esters) 0 0 0 0 0 0 0