PUREMARK

Chemicals used in industry, namely, chemicals for use in the petroleum and gas industry, chemicals for use in removing sulfur containing compounds and/or carbon dioxide from petroleum and gas during petroleum and natural gas production, chemicals for use in removing hydrogen sulfide and/or carbon dioxide from petroleum and gas transportation systems, chemicals for use in removing hydrogen sulfide and carbon dioxide from petroleum and gas during petroleum refining operations, chemicals for use in removing hydrogen sulfide and/or carbon dioxide from petroleum, chemicals for use in removing sulfur containing compounds generated in pulp mills, chemicals for use in the removal of sulfur in the gaseous or aqueous phase of pulp mill effluents, hydrogen sulfide scavengers for use in water-based drilling fluids in oil and gas wells