Section 06 Products of the chemical or allied 29 Organic chemicals 29 03 Halogenated derivatives of hydrocarbons 29 03 23 - - Tetrachloroethylene (perchloroethylene) 29 03 23 00 - - Tetrachloroethylene (perchloroethylene) Commodity Code Description 29 03 23 00 000 - - Tetrachloroethylene (perchloroethylene)