Section 06 Products of the chemical or allied industries 29 Organic chemicals 29 20 Esters of other inorganic acids of non-metals (excluding esters of hydrogen halides) and their salts; their halogenated, sulphonated, nitrated or nitrosated derivatives. 29 20 23 Trimethyl phosphite 29 20 23 00 Trimethyl phosphite Commodity Code Description 29 20 23 00 000 Trimethyl phosphite