- Chemrec - Specialized in hazardous waste disposal, industrial solvent recovery and purification.
- Chemring Energetics UK Ltd - Provides equipment based on energetic materials (explosive, propellant) for the defence, paramilitary & key commercial customers.
- Chiltern Connections - UK based company specialising in conformal coating for the electronic and automotive industries, mainly greases.
- Chimar srl - Specialized in the manufacturing of mixtures and masterbatches for the colouring and additivation of plastics.
- Ciba Specialty Chemicals - Specialized in the discovery, manufacture and marketing of innovative specialty chemicals.
- CMS Chemicals Ltd - Offers carbohydrates, disaccharides, oligosaccharides, protected sugars, pyridine derivatives, isocyanates, and more.
- Colenso - Offers a complete screen and pad print solution, from the research and development of ideas, to the final print process function.
- COLORAL - Chemical chromating, chemical gravage, decorative anodic oxydation (more than 50 colors), hard anodic oxydation, organic oxydation, titanium electrolytic polishing.
- Construction Chemicals (UK) Ltd - Produces a range of admixtures for mortar, brick cleaner, wood stains, silicones, joinery products, paints, and more.
- Contract Chemicals Ltd. - A manufacturer of fine organic chemicals. Product applications cover the pharmaceutical, agrochemical, and fragrance industries.
- Cookson Electronics - Specialized in performance materials, chemistry and technology solutions to the electronics industry.
- Cray Valley - Develops high-technology resins and additives for the coatings industry-paints, inks, varnishes, adhesives and polyester resins.
- Croda - Specialized in chemicals, sold to a wide range of industries in personal care, health care, home care and crop care.
- CSS Ltd. - UK based suppliers of chemical dosing equipment and PTFE tubing, including boiler and cooling tower dosing equipment.
- Curust Industries Ltd - Suppliers of solvents, specialist paints, general hardware and security products to the Irish retail market.
- Cyclon Hellas S.A. - Specialized in the field of petrochemicals, being the only enterprise in Greece.
- Delamine B.V. - Specialized in ethylenediamine, diethylenetriamine , piperazine anhydrous and more.
- Dicalite - Supplies finished products in the filtration field on the basis of perlite, diatomite, and cellulose.
- Dollmar - Specialized in the production and distribution of chemical products for industrial cleaning plants, varnishing plants and more.
- Dosatron International - A manufacturer of non-electric proportional liquid dispensers and medicators.
- Dottikon - Specialized in hazardous, safety-critical chemical reactions focused on the exclusive synthesis of fine chemicals.
- Dr. Paul Lohmann GmbH KG - Produces inorganic and organic mineral compounds.
- Durieu - Aims to provide original and maintenance and renovation chemical products.
- East Lancashire Chemical Co - Specialist manufacturers of sodium carbonate derivatives, producing a range of innovative alkali cleaning products.
- Eburon Organics - Dedicated to the development, production and marketing of innovative synthons and reagents for organic chemistry.
- Eskaro - Produces paints, varnishes, putties, wood protectors, glues and other products.
- Esseco - Offers products that guarantee performance and security in the field of sulfur chemistry.
- Essenscia - Represents the numerous sectors of activities in the field of chemicals and the life sciences.
- Evans Vanodine Int'l plc - Manufacturer of chemicals for cleaning and hygiene in the janitorial industry and chemicals for livestock protection.
- Evonik Industries - An industrial group, holding positions in the business areas chemicals, energy, and real estate.
- Explosive Service a.s. - Specialized in the production of ammonium nitrate & plastic explosives to the most modern state-of-the-art emulsion explosives.
- Expressions Parfumées - A company of perfumers with a vision and a human dimension of perfumery.
- F. Ball and Co. Ltd - Manufacturers of flooring adhesives and floor preparation products for the contract flooring industry.
- F2 Chemicals - Providers of perfluorocarbon, perfluorodecalin, perfluorinated fluids, octafluoropropane, perfluoroctane ophthalmology, and more.
- Ferro - Specialized in consumer electronics, telecommunications, pharmaceuticals, building and renovation,and industrial products.