- Aeriform
 - Houston - Supplies packaged gases, equipment and services to business, education, medical, and industry. - Aptech Services
- Houston - Supplies rare earth, chemical, and silica gel materials for industrial use.
- Century Corrosion Technologies, Inc.
- Houston - Manufacturer of coatings, chemical products, cleaning products, and soluble salt removers.
- Chem One
- Houston - Wholesaler and distributor of imported, dry chemicals.
- Chemical Market Resources, Inc.
- Houston - Market research and strategic planning for the chemicals, petrochemicals, plastics and related industries in North America, Europe, and the Pacific Rim.
- Chemicals Incorporated
- Baytown - Custom and toll manufacturing of speciality chemicals, 4-phenyl butric acid, resins, polymers, OMC.
 Chemisolv
- Houston - Solves environmental and process problems using speciality chemical treatment programmes for the wastewater treatment, pulp & paper, and hydrocarbon processing industries.- Criterion Catalysts
- Houston - Manufacturer of catalysts for hydrotreating, hydrocracking, reforming, and styrene production.
- CXY Chemicals
- Houston - Manufactures and markets inorganic chemicals sold to the pulp and paper, water treatment, petrochemical, and oil and gas industries.
- Economy Polymers & Chemicals
- Houston - Manufacturer of guar, hydroxypropyl guar, biocides, crosslinkers, and monomers.
- Equistar
- Houston - Producer of polypropylene, oxygenated chemicals, performance polymers, and wire cable resins and compounds.
- ESCO Products, Inc.
- Houston - Distributors of sealants, lubricants and fluids.
- Hitemco
- Houston - Surface enhancement and coating services company.
- Industrial Polymers Corporation
- Houston - Manufacturer and developer of (RTV) 2 component urethanes including coatings, casting resins, rubber moulding materials,and more.
- Kem-Tron, Inc.
- Houston - Supplier of water soluble polymers and application equipment for textile, paper and pulp, industrial, oil, and domestic waste water applications.
- KMG Chemicals, Inc.
- Houston - Manufactures and distributes chemicals for preservation and protection of lumber, railroad ties, and utility poles.
- Marcus Oil & Chemical
- Houston - Produces low molecular weight polyethylene waxes for use in a diverse range of applications including adhesives, textiles, and other industries.
- Mastrrr Company
- Manufacturer of chemical induction feeder mixers for the municipal water and wastewater, industrial, pharmaceutical, and food processing industries.
- MPR Services, Inc.
- Dickinson - Generic, proprietary, mixed and performance amines.
- MSDS Online
- Houston - Provides solutions for MSDS compliance. Search, view and manage Material Safety Data Sheets online.
- NL Industries
- Houston - Manufacturer and marketer of titanium dioxide pigments and speciality chemicals.
- Phillip Townsend Associates, Inc.
- Houston - Provides market research, management consulting, and other consulting services for the plastic and chemical industries.
- Pioneer Companies
- Houston - Produces chlorine and caustic soda for several regional merchant markets in North America.
- Quest Consultants, Inc.
- Houston - Dedicated to providing process safety management services to the hydrocarbon, petrochemical, and chemical processing industries.
- Tetra Technologies
- The Woodlands - Speciality inorganic chemical company developing products, services, and process technologies for oil and gas, agriculture, and environmental industries.
- Vapor Tech
- Houston - Manufacturing chemicals for odour control,industrial cleaning uses and vapor scrubbing systems; and tank cleaning equipment.
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