28401900 under HS Code BORATES; PEROXOBORATES (PERBORATES) - DISODIUM TETRABORATE (REFINED BORAX) : OTHER, 29181400 under HS Code CARBOXYLIC ACIDS WITH ADDITIONAL OXYGEN FUNCTION AND THEIR ANHYDRIDES, HALIDES, PEROXIDES AND PEROXYACIDS; THEIR HALOGENATED, SULPHONATED, NITRATED OR NITROSATED DERIVATIVES - CARBOXYLIC ACIDS WITH ALCOHOL FUNCTION, BUT WITHOUT OTHER OXYGEN FUNCTION, THEIR ANHYDRIDES, HALIDES, PEROXIDES, PEROXYACIDS AND THEIR DERIVATIVES : CITRIC ACID, and 28092010 under HS Code DIPHOSPHORUS PENTAOXIDE; PHOSPHORIC ACID; POLYPHOSPHORIC ACIDS, WHETHER OR NOT CHEMICALLY DEFINED - PHOSPHORIC ACID AND POLYPHOSPHORIC ACIDS : PHOSPORIC ACID were the top imported HS Codes by HIMANSHU EXIM in 2021.