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Home > Catalyst and Auxiliary
According to the catalyst definition by the International Union of Pure Chemistry and Applied Chemistry (IUPAC) in 1981, a catalyst is a substance that alters the reaction rate without affecting the Gibbs free energy of the overall standard reaction. Catalysts span diverse types: liquid and solid catalysts based on state, and homogeneous versus heterogeneous catalysts based on phase state within the reaction system. In industrial processes, auxiliaries like centrifuge catalysts enhance production processes, improve product quality, or enable specific application performance. The array of auxiliaries definition is extensive, with varied performance - optimal effects stem from proper usage. ECHEMI's "Catalyst and Auxiliary" section predominantly supplies raw materials for Catalyst and Auxiliary.

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Sourcing catalyst intermediates can be complex, but ECHEMI makes it simple. Connect with 314 trusted manufacturers and 301 verified distributors offering a wide range of catalysts, including auxiliaries, centrifuge catalysts, and specialty intermediates for chemical production, pharmaceuticals, and industrial applications. Find high-quality catalysts and get competitive quotes from reliable suppliers.
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1185 Catalyst and Auxiliary items

Chlorinated polyethylene

CAS No: 64754-90-1

Categories: Catalyst and Auxiliary > Polymer

Chlorinated polyethylene resin is a new type of synthetic material with a series of excellent properties. It is an excellent impact modifier for PVC plastics and a synthetic rubber with good comprehensive properties. It has a very wide range of applications and has been widely used in cables, wires, hoses, tapes, rubber and plastic products, sealing materials, and flame retardant conveyor belts. , Waterproof membranes, films and various profiles and other products. CPE can also be blended with pMore

Dichlorobis(triphenylphosphine)palladium

CAS No: 13965-03-2

Formula: C36H30Cl2P2Pd

Categories: Catalyst and Auxiliary > Antioxidants

Dichlorobis(triphenylphosphine) Palladium (II) is used primarily in organometallic catalytic reactions due to the palladium content of the compound. It is also involved in crystalized structures of metallacyclic complexes which show antiinflammatory and antifungal properties.More

Polychloroprene

CAS No: 9010-98-4

Formula: (C4H5Cl)x

Categories: Catalyst and Auxiliary > Polymer

Polychloroprene has an appearance of milky white, beige or light brown flakes or blocks, with a molecular weight of 88.5355 and a density of 1.23 g/mL (at 25 °C). Polychloroprene is soluble in toluene, xylene, chloroform, and ethylene dichloride, slightly soluble in acetone, butanone, ethyl acetate, and cyclohexane, and insoluble in n-hexane and solvent gasoline. Polychloroprene has good physical, chemical, and mechanical properties. Compared with natural rubber, it has a high density, is resistant to water and hydrocarbon solvents, has low permeability to many gases, has good degradation properties to oxygen, ozone, hydrogen chloride, hydrogen fluoride and other chemicals, has a certain degree of flame retardancy, and a decomposition temperature of 230-260 °C. It can be used for a long time at 80-100 °C.More

Dimethyl succinate-4-hydroxy-2,2,6,6-tetramethyl-1-piperidineethanol copolymer

CAS No: 65447-77-0

Formula: (C11H23NO2.C6H10O4)x

Categories: Catalyst and Auxiliary > UV Absorbers

Light stabilizer 622 is a polymer light stabilizer with multiple functional groups. It can be used for low density polyethylene film, polypropylene tape, EVA film, ABS, PP fiber PE, polyoxymethylene, polyamide, polyurethane, polyvinyl chloride, PVC blend materials, polystyrene, rubber and viscose, it UV absorber can be used because of its special structure and large molecular weight (3000). It can also be used in film and fiber. It can also be used as a heat stabilizer for antioxidants and polymMore

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Solvent naphtha (petroleum), heavy arom.

CAS No: 64742-94-5

Formula:

Categories: Catalyst and Auxiliary > Dissolving Agent

Main use: It can separate a variety of organic raw materials, such as gasoline, benzene, kerosene, asphalt, etc. As a reforming raw material for the production of aromatic hydrocarbons, a 70°C to 145°C fraction is used, called light naphtha; when the purpose is to produce high Chemicalbook octane number gasoline, a 70°C to 180°C fraction is used to weigh the naphtha; When used as a solvent, it is called solvent naphtha; the aromatic solvent from coal tar is also called naphtha or solvent naphthaMore

2,4,6-Tribromophenol

CAS No: 118-79-6

Formula: C6H3Br3O

Categories: Catalyst and Auxiliary > Coupling Agent

WHITE TO SLIGHTLY BROWN POWDER Long, soft white crystals. 2,4,6-Tribromophenol has a penetrating bromine odor.ChEBI: A bromophenol that is phenol substituted by bromo groups at positions 2, 4 and 6. It is commonly used as a fungicide and in the preparation of flame retardants.Soft, long, white crystals with a bromine odor.More

2-(2H-Benzotriazol-2-yl)-4,6-bis(1-methyl-1-phenylethyl)phenol

CAS No: 70321-86-7

Formula: C30H29N3O

Categories: Catalyst and Auxiliary > UV Absorbers

UV-234 is a light yellow powder with a melting point of 135-145°C. It is soluble in chloroform, dichloromethane, benzene, ethyl acetate and other organic solvents, slightly soluble in alcohols, and insoluble in water. Benzotriazole ultraviolet absorber, suitable for polycarbonate, polyvinyl chloride, polyoxymethylene, polyamide, polyester, paint, etc. It is an excellent light stabilizer, used in PE, PP, polyester and coatings; low-volatility benzotriazole UV absorber and stabilizerMore

Polybutylene Terephthalate

CAS No: 26062-94-2

Formula:

Categories: Catalyst and Auxiliary > Film Forming

Poly(butylene terephthalate) is prepared in a condensation reaction between dimethyl terephthalate and 1,4-butanediol and its repeating unit has the general structure:

This thermoplastic shows good tensile strength, toughness, low water absorption, and good frictional properties, plus good chemical resistance and electrical properties.More

2-Phenylbenzimidazole-5-sulfonic acid

CAS No: 27503-81-7

Formula: C13H10N2O3S

Categories: Catalyst and Auxiliary > Light Stabilizer

Ensulizole is a sulfonated UV absorber and can intense UVB and partial UVA absorption. Ensulizole can damage the DNA through the generation of reactive oxygen species (ROS) upon UV or sunlight irradiation. Ensulizole is a water soluble sunscreen ingredient[1].More

Frequently Asked Questions

How to choose the right catalyst for your application?

When selecting a catalyst, it is important to consider the type of reaction, operating temperature, pressure, solvents involved, and desired selectivity. Other key factors include catalyst lifetime, regeneration ability, and compatibility with your process. On ECHEMI, you can browse a wide range of catalyst and auxiliary products and compare specifications from multiple global suppliers to find the best option for your needs.

What is a catalyst?

Synonyms for catalyst include accelerator, promoter, stimulant, etc. A catalyst is a substance that speeds up a chemical reaction without undergoing any permanent changes. According to the catalyst definition, it doesn't alter the thermodynamics or the catalyst meaning of the reaction, but it lowers the activation energy required for the reaction to occur. Basically, a catalyst facilitates the reaction process and increases the conversion rate without being consumed in the reaction itself. It may exist in a variety of forms, including enzymes, metals, or complex compounds.

How does a catalyst work?

The function of a catalyst is to provide an alternative pathway for a chemical reaction to take place. It reduces the activation energy required for the reaction to begin, thus speeding up the rate of the reaction. The catalyst apex is the point at which the catalyst's effect on the reaction reaches maximum efficiency. It diminishes existing chemical bonds or establishes intermediary structures, so simplifying the reaction process, consequently expediting the production of substances. This mechanism, often utilized by catalyst companies, leads to accelerated product formation.

Are enzymes catalysts?

Yes, according to the catalyst definition, enzymes are biological catalysts. Enzymes, considered protein-based catalyst synonym, facilitate biochemical reactions within living organisms. Within defined temperature and pH parameters, enzymes function as exceedingly efficient catalysts, diminishing the activation energy necessary for reactions to occur. These auxiliaries, when integrated into biological systems, demonstrate specificity and selectivity in catalyzing particular reactions, rendering them pivotal as key catalysts across diverse biological processes.

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