1
chemicals, namely, catalysts and absorbents used for purification of chemical feedstocks and industrial liquids, vapors and gases; catalysts; chemical absorbents; chemicals to assist in the purification of natural gas, industrial oils and petrochemicals
40
chemical processing of liquids, gases, natural gas, industrial oils and petrochemicals; industrial treatment of gases, liquids, natural gas, industrial oils and petrochemicals in the presence of catalysts and/or absorbents; services, namely, chemical treatment or processing for the industrial purification of gases, liquids, natural gas, industrial oils and petrochemicals
42
chemical consulting, namely, advice and provision of technical information relating to the purification of gases, liquids, natural gas, industrial oils, petrochemicals and catalysts