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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 300 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

Benazol P

CAS No: 2240-22-4

Formula: C13H11N3O

Categories: Catalyst and Auxiliary > UV Absorbers

Used as UV absorber for polyester, polystyrene, acrylic resin, polyvinyl chloride and other plastics, fibers and coatingsMore

Ethylene-vinyl acetate copolymer

CAS No: 24937-78-8

Formula: (C4H6O2.C2H4)x

Categories: Catalyst and Auxiliary > Film Forming

Ethylene-vinyl acetate copolymer (EVA) is a versatile thermoplastic that combines the properties of ethylene and vinyl acetate. This copolymer is characterized by its flexibility, transparency, and resistance to UV radiation and stress-cracking. EVA exhibits excellent adhesion properties, making it an ideal material for various applications. Its low-temperature flexibility and softness enhance its usability in diverse fields.More

Paraffin waxes, chloro

CAS No: 63449-39-8

Categories: Catalyst and Auxiliary > Plastic Rubber Chemicals

The state of matter in which the particles of a substance are loosely bound by intermolecular forces. The weakness of these forces permits movement of the particles and consequently liquids can change their shape within a fixed volume. The liquid state lacks the order of the solid state. Thus, amorphous materials, such as glass, in which the particles are disordered and can move relative to each other, can be classed as liquids. liquid: A phase of matter between that of a crystalline solid and More

DTDM

CAS No: 103-34-4

Formula: C8H16N2O2S2

Categories: Catalyst and Auxiliary > Antioxidants

Vulcanizing agent and vulcanization accelerator for natural rubber and synthetic rubber. Active sulfur can be released at the vulcanization temperature, and the effective sulfur content is 27%. The operation is safe. The vulcanization speed is slow when used alone. Combined with thiazoles, thiurams and dithiocarbamates can increase the vulcanization speed. This product is non-frosting, non-polluting, non-discoloring, and easily dispersed. Especially suitable for butyl rubber. Mainly used to manuMore

C.I. Fluorescent Brightener 351

CAS No: 38775-22-3

Formula: C28H22O6S2

Categories: Catalyst and Auxiliary > Fluorescent Brightener

Fluorescent brighteners can improve the whiteness and gloss of materials. Mainly used in textile, paper, plastic, leather, soap, synthetic detergent and other daily necessities industrial sectors. Fluorescent whitening is different from chemical bleaching and will not damage the color and strength of the fabric. However, for fabrics and papers with dark background, if they are directly treated with brighteners without bleaching, better results cannot be obtained.More

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Tinuvin 1577

CAS No: 147315-50-2

Formula: C27H27N3O2

Categories: Catalyst and Auxiliary > UV Absorbers

Ultra-low volatility UV absorber and stabilizer. It can make polycarbonate and polyester achieve better weather resistance than traditional benzotriazole ultraviolet absorbers. The low chelating tendency allows it to be used in polymer formulations containing residual catalyst.More

Chlorinated natural rubber

CAS No: 9006-03-5

Formula:

Categories: Catalyst and Auxiliary > Plastic Rubber Chemicals

An elastomer (natural rubber or a polyolefin) to which 65% of chlorine has been added to give a solid, film-forming resin. White, amorphous powder available in viscosity grades from 5 to 125 c P, the figures indicating vis- cosity of a 20% solution in tolMore

Acrylamide-acryloyloxyethyltrimethylammonium chloride copolymer

CAS No: 69418-26-4

Formula: (C8H16NO2.C3H5NO.Cl)x

Categories: Catalyst and Auxiliary > Film Forming

Acrylamide-acryloyloxyethyltrimethylammonium chloride copolymer is a cationic copolymer composed of acrylamide and 2-(acryloyloxy)ethyltrimethylammonium chloride. It is a water-soluble, high molecular weight polymer that appears as a clear to slightly hazy liquid. The presence of quaternary ammonium groups imparts a strong positive charge, enabling it to interact effectively with negatively charged surfaces, such as hair and skin. More

Antioxidant 245

CAS No: 36443-68-2

Formula: C34H50O8

Categories: Catalyst and Auxiliary > Antioxidants

This product is used as an antioxidant for the processing of styrene polymers such as HIPS, MBS, ABS, engineering plastics such as POM, PA, and polyurethane such as spandex and the improvement of long-term thermal stability. It is also an effective chain terminator in the PVC polymerization process. This product has no effect on polymer reaction. When used in high impact polystyrene and polyvinyl chloride, it can be added to the monomer before polymerization.More

Poly(vinyl chloride)

CAS No: 9002-86-2

Formula: (C2H3Cl)x

Categories: Catalyst and Auxiliary > Film Forming

Peroxide- or thiadiazole-cured CPE exhibits good thermal stability up to 150°C and is much more oil resistant than nonpolar elastomers such as natural rubber or EPDFM.
Commercial products are soft when the chlorine content is 28–38%. At more than 45% chlorine content, the material resembles polyvinyl chloride. Higher-molecular-weight polyethylene yields a chlorinated polyethylene that has both high viscosity and tensile strength. often provided for research as a 50% suspension in water, whMore

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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