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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 318 trusted manufacturers and 312 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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1190 Catalyst and Auxiliary items

1,4-Bis(2-benzoxazolyl)naphthalene

CAS No: 5089-22-5

Formula: C24H14N2O2

Categories: Catalyst and Auxiliary > Fluorescent Brightener

Fluorescent brightener 367 is mainly used for the whitening of synthetic fibers and plastic products. It has a significant effect of increasing the gorgeousness of colored plastic products. It is also used for PE, PP, PVC, PS, ABS, etc.More

Dibutyl phthalate

CAS No: 84-74-2

Formula: C16H22O4

Categories: Catalyst and Auxiliary > Perfuming

Dibutyl phthalate is a commonly used plasticizer commonly found in some food packaging materials, personal care products, and the coating of oral medications[1]. May cause toxicity and adverse neurobehavioral effects[2][3]. More

Cyanuric acid

CAS No: 108-80-5

Formula: C3H3N3O3

Categories: Catalyst and Auxiliary > Biocide & Algicide

white powdercyanuric acid: A white crystallinewater-soluble trimer of cyanic acid,(HNCO)3. It is a cyclic compound havinga six-membered ring made of alternatingimide (NH) and carbonyl(CO) groups (i.e. three -NH-C(O)-units). It can also exist in a phenolicform (three -N=C(OH)- units). ChEBI: The keto tautomer of cyanuric acid. Crystals.More

Polyethylene glycol dimethyl ether

CAS No: 24991-55-7

Formula: (C2H4O)nC2H6O

Categories: Catalyst and Auxiliary > Polyethylene Glycol Derivatives

NHD (polyethylene glycol dimethyl ether) solvent is a new type of high-efficiency desulfurization and decarbonization solvent. The product has high purity and good chemical stability and thermal stability to high acidity, alkalinity media and high temperature. It is suitable for the purification of coal-made chemicalbook gas. It can effectively remove mixed acid gases such as natural gas, oil field gas, refinery gas and city gas, and hydrogen sulfide gas in liquefied gas. In particular, it can eMore

Polypropylene

CAS No: 9003-07-0

Formula: (C3H6)x

Categories: Catalyst and Auxiliary > Viscosity Controlling

Polypropylene (PP) is a semi-crystalline thermoplastic polymer made from propylene monomers through addition polymerization. It is usually a white waxy solid, non-toxic, odorless, transparent in appearance and light in texture. Its chemical formula is (C3H6)n, and its density is 0.89-0.92 g/cm3, making it the thermoplastic resin with the lowest density. Its melting point is 164-176°C, softening at around 155°C, and its operating temperature range is -30-140°C. Polypropylene is antibacterial and easy to dye, and has good insulation properties, chemical stability, heat resistance, transparency, corrosion resistance, weather resistance and plasticity.More

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Tris(2,4-di-tert-butylphenyl) phosphite

CAS No: 31570-04-4

Formula: C42H63O3P

Categories: Catalyst and Auxiliary > Antioxidants

This product is a low volatile organic synthetic antioxidant and polymerization inhibitor, which is widely used in the synthesis and processing of various plastics such as polypropylene, polyethylene, ABS, polycarbonate fiber and polyester resin. An excellent phosphite antioxidant, white powder in appearance, easily soluble in organic solvents such as benzene, chloroform, cyclohexane, slightly soluble in ethanol, acetone, insoluble in polar solvents such as water and alcohol, slightly soluble InMore

Acetyl tributyl citrate

CAS No: 77-90-7

Formula: C20H34O8

Categories: Catalyst and Auxiliary > Perfuming

clear colorless liquid Acetyltributyl citrate is a clear, odorless, practically colorless, oily liquid. Tributyl acetylcitrate has a very faint, sweet, herbaceous odor. At high levels (e.g., 1000 ppm emulsion in water), it has a mild, fruity, nondescript flavor. Acetyl tributyl citrate (ATBC) is a colorless, odorless liquid. Its water solubility is less than 0.002 g/100 mL, but it is soluble in organic solvents.More

Bisphenol A-carbonic acid copolymer

CAS No: 25037-45-0

Formula: (C15H16O2.CH2O3)x

Categories: Catalyst and Auxiliary > Polymer

Bisphenol A-carbonic acid copolymer is a polyester in which dihydric (or polyhydric) phenols are linked together by carbonate bonds. Bisphenol A-carbonic acid copolymer is the toughest of all thermoplastics. They are transparent, strong, autoclavable, and non-toxic. Its brittle temperature is 135°C. Bisphenol A-carbonic acid copolymer has good oxidative stability, mainly because it does not contain secondary and tertiary carbon atoms. The polymer is stable in air for a long time. At higher temperatures, some oxidation and crosslinking will occur. Ultraviolet light is strongly absorbed by polycarbonate, causing cracking and degradation. However, this effect is limited to the surface and no deep deterioration will occur. Therefore, although the film may become brittle when weathered, the molded parts will not be seriously affected. Bisphenol A-carbonic acid copolymer can be melt processed by all standard techniques, although its melt viscosity is quite high. The polymer has a wide range of uses, and the largest application is in the electronics/business machine field for parts such as connectors, terminals and covers.More

UV 328

CAS No: 25973-55-1

Formula: C22H29N3O

Categories: Catalyst and Auxiliary > UV Absorbers

As an ultraviolet absorber, it is soluble in organic solvents such as benzene, toluene, styrene, cyclohexane, methyl methacrylate, ethyl acetate, ketones, etc. This product is mainly suitable for polyolefin, polystyrene, polyvinyl chloride, Polyurethane, polyester and other products. It is an excellent variety of benzotriazole ultraviolet absorbers. The maximum absorption wavelength is 345nm. The general dosage is about 0.1%. Suitable for polyolefin (especially polyvinyl chloride), polyester, sMore

Tributyl citrate

CAS No: 77-94-1

Formula: C18H32O7

Categories: Catalyst and Auxiliary > Film Forming

It is colorless, oily liquid, slightly scented. It is insoluble in water, soluble in methanol, acetone, carbon tetrachloride, acetic acid, castor oil, mineral oil, organic solvents.More

Acrylic acid-2-acrylamido-2-methylpropanesulfonic acid copolymer

CAS No: 40623-75-4

Formula: (C7H13NO4S.C3H4O2)x

Categories: Catalyst and Auxiliary > Viscosity Controlling

AA/AMPS is mainly used for scale inhibition and dispersion of open industrial circulating cooling water system, oilfield sewage reinjection system, metallurgical system circulating water treatment, steel plant leaching cooling water to prevent Fe2O3 slime deposition, AA/AMPS can be combined with organic phosphine Combined use of acid salt and zinc salt, suitable for pH conditions of 7.0 to 9.5. AA/AMPS can also be used as textile printing and dyeing auxiliary. Used in organic chemical intermediaMore

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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