2918290010
- Carboxylic acids with additional oxygen function and their anhydrides, halides, peroxides and peroxyacids; their halogenated, sulphonated, nitrated or nitrosated derivatives
- Carboxylic acids with phenol function but without other oxygen function, their anhydrides, halides, peroxides, peroxyacids and their derivatives
- Other
- Sulphosalicylic acids, hydroxynaphthoic acids; their salts and esters
- Monohydroxynaphthoic acids