Carboxylic acids with phenolic function, non - oxygen. Ortho - acetyllic acid. Other salicylic acid esters and their salts

Carboxylic acids with phenolic function but without other oxygen function, their anhydrides, halides and peroxides, and their oxides and their derivatives:
2918.21 Salicylic acid and its salts.
292.22 - Ortho - acetyllic acid, salts and esters.
2918.23 Other salicylic acid esters and their salts.
2918.29 Other.
2918.30 - Carboxylic acids with aldehyde or ketone function, but without other oxygen function, their anhydrides, halides and peroxides, and their oxides and their derivatives.
Other.
This item includes carboxylic acids with additional oxygen function, anhydrides, halides, peroxides, peroxides of their acids, esters, salts, halogenated, sulphonated, nitrated or nitrosated derivatives (including compound derivatives) of any of these products.
The Oxygene formula means compounds containing, as well as acidic function, or several oxygen functions mentioned in the previous subcategories (etherical, phenolic, aldehyde, ketone, etc.).
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