Gotham Industries Inc.
- Manufactures, packages and distributes branded and private-label formulated end-user products, including solvents, cleaners, paints, and automotive fluids. Québec, Canada.
- http://www.gothamindustries.com

Grace
- Specialty chemicals and materials company, supplying catalysts and silica products, construction and container products.
- http://www.grace.com/

Gaoyou Auxiliary Factory
- Produces fluorescent brighteners, organic pigments, antioxidants, blowing agents and catalysts for foam production, and a range of organic intermediates.
- http://www.gy-chem.com

Gulf Resources Development Corporation
- Diversified manufacturer of inorganic and organic industrial chemicals, petrochemicals, plastics and rubbers, and agrochemicals, based in the United Arab Emirates with operations in the Persian Gulf, India, and China.
- http://www.gulfresources.com/

GKCH GmbH
- German supplier of a variety of organic and inorganic chemicals and reagents. List of products carried.
- http://www.gkch-killinger.de

Guardian Anti-Corrosives Pvt. Ltd.
- Manufacturer and exporter of metal pre-treatment chemicals, anti-corrosives and rust preventive, phosphating chemicals form Chennai, South India.
- http://www.guardianchemicals.com/

Grace Davison
- Manufacturer of catalysts, silicas, adsorbents and specialty products.
- http://www.gracedavison.com/

Great Western Inorganics, Inc.
- Supplier of hard to find inorganic materials.
- http://www.greatwesterninorganics.com/

Gulf Membrane & Coating Industries WLL
- Manufacturers of waterproofing compounds, bituminous based resins, felts, and paints.
- http://www.gmcibahrain.com

GTF Labs, Inc.
- California based manufacturer of specialty chemical products. Primary focus is on Industrial Strength products used as additives, intermediates or cleaning compounds.
- http://www.gtflabs.com/