291611 Acrylic Acid and Its Salts
291612 Esters of Acrylic Acid
291613 Methacrylic Acid and Its Salts
291614 Esters of Methacrylic Acid
291615 Oleic, Linoleic, Linolenic Acids, Their Salts and Esters
291619 Other Unsaturated Acyclic Monocarboxylic Acids, Their Anhydrides, Halides
291620 Cyclanic, Cyclenic, Cycloterpenic Monocarboxylic Acids, Their Derivatives
291631 Benzoic Acid, Its Salts and Esters
291632 Benzoyl Peroxide, Benzoyl Chloride
291633 Phenylacetic Acid, Its Salts and Esters
291639 Other Aromatic Monocarboxylic Acids, Their Anhydrides, Halides, Peroxides
