Section 06 PRODUCTS OF THE CHEMICAL OR ALLIED INDUSTRIES 28 INORGANIC CHEMICALS; ORGANIC OR INORGANIC COMPOUNDS OF PRECIOUS METAL, OFRARE-EARTH METALS, OF RADIOACTIVE ELEMENTS OR OF ISOTOPES 28 06 HYDROGEN CHLORIDE (HYDROCHLORIC ACID); CHLOROSULPHURIC ACID. Commodity Code Description 28 06 10 HYDROGEN CHLORIDE (HYDROCHLORIC ACID) 28 06 20 CHLOROSULPHURIC ACID