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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

Acrylonitrile-butadiene copolymer

CAS No: 9003-18-3

Formula: (C4H6.C3H3N)x

Categories: Catalyst and Auxiliary > Film Forming

NBR is important for its high oil and temperature resistance. Flexibility at very low temperatures is obtained with lower acrylonitrile content: in turn, this sacrifices some oil resistance. Low-temperature flexibility for some applications can be modified by plasticizers or blends. Additional properties include resistance to heat, abrasion, and water, as well as resistance to gas permeation. NBR is frequently plasticized with organic phosphate, phthalic ester, or dibenzyl ether.More

Benzoflex 9-88

CAS No: 27138-31-4

Formula: C20H22O5

Categories: Catalyst and Auxiliary > Skin Conditioning

​Benzoflex 9-88, also known as dipropylene glycol dibenzoate (DPGDB), is a chemical compound with the formula C₂₀H₂₂O₅. ​​Benzoflex 9-88 is characterized by a melting point of approximately -40 °C, a boiling point around 232 °C at 5 mm Hg, and a density of 1.12 g/mL at 25 °C. The compound is stable and combustible, with incompatibility with strong oxidizing agents. Benzoflex 9-88 is valued for its low volatility, good compatibility with various resins, and resistance to heat and ultraviolet light. ​More

Silver acetate

CAS No: 563-63-3

Formula: C2H4O2.Ag

Categories: Catalyst and Auxiliary > Precious Metal Catalysts

Silver acetate is a white crystalline solid that is soluble in water and alcohol. It is commonly formed by reacting silver nitrate with acetic acid or its salts and is known for its distinctive properties in chemical reactions.More

Polyquaternium 11

CAS No: 53633-54-8

Formula: (C8H15NO2.C6H9NO)x.xC4H10O4S

Categories: Catalyst and Auxiliary > Film Forming

PQ-11 can form a clear, uniform liquid film on the surface of the object, and the film is basically not sticky. PQ-11 has cationic properties. PQ-11 can also be used in combination with anionic and amphoteric surfactants.More

Poly[[6-[(1,1,3,3-tetramethylbutyl)amino]-1,3,5-triazine-2,4-diyl][(2,2,6,6-tetramethyl-4-piperidyl)imino]hexamethylene[(2,2,6,6-tetramethyl-4-piperidyl)imino]]

CAS No: 71878-19-8

Formula: (C35H66N8)n

Categories: Catalyst and Auxiliary > Plastic Rubber Chemicals

Suitable for low density polyethylene film, polypropylene fiber, polypropylene tape, EVA film, ABS, polystyrene and food packaging Polymeric high-efficiency hindered amine light stabilizer, low volatility, low migration, heat stabilizing effect and antioxidant effect, and has a synergistic effect with antioxidants and ultraviolet absorbers. It can be used in polyolefins, olefin copolymers, polyphenylene ether compounds, polyoxymethylene, urethane, soft and hard PVC and PVC blends, etc. SuitableMore

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2,4-Bis-(n-octylthio)-6-(4-hydroxy-3′,5′-di-tert-butylanilino)-1,3,5-triazine

CAS No: 991-84-4

Formula: C33H56N4OS2

Categories: Catalyst and Auxiliary > Antioxidant Ingredient

It is an organic compound that can inhibit or delay the thermal oxidation of polymers and other organic compounds in the air. Usually, it is very effective to add a small concentration of 1% antioxidant. For example, foods are prone to oxidative deterioration, and a small amount of antioxidants can be added to extend their storage time. Polymer materials such as plastics, synthetic fibers and rubber are prone to thermal oxidative degradation reactions. The addition of antioxidants can maintain tMore

Decanedioic acid, 1,10-bis(2,2,6,6-tetramethyl-4-piperidinyl) ester, reaction products with tert-Bu hydroperoxide and octane

CAS No: 129757-67-1

Formula: C28H52N2O4.C8H18.C4H10O2

Categories: Catalyst and Auxiliary > UV Absorbers

Mainly used as a light stabilizer, suitable for polypropylene, high density polyethylene, polyurethane, polystyrene, ABS tree fat, etc. Its light stabilizing effect is better than the light stabilizers commonly used in the past. When used together with antioxidants, it can improve heat resistance, and when used together with ultraviolet light absorbers, it also has a synergistic effect, which can further improve the light stabilization effect.More

Fluorescent Brightener 135

CAS No: 1041-00-5

Formula: C18H14N2O2

Categories: Catalyst and Auxiliary > Fluorescent Brightener

This product is used as a brightener for synthetic fibers, and is suitable for the whitening of polyester, nylon, acetate fiber or synthetic fiber blended with cotton and wool. The fabrics using it has effective light fastness and wet fastness. Used as a brightener for polyester, polyamide, acetate fiber and blended fabrics, etc.More

Antioxidant ODA

CAS No: 101-67-7

Formula: C28H43N

Categories: Catalyst and Auxiliary > Antioxidants

white to beige powderWhite powder or beige solid. Slight amine odor.More

Tetrabenzylthiuram disulfide

CAS No: 10591-85-2

Formula: C30H28N2S4

Categories: Catalyst and Auxiliary > Antioxidants

This product was developed for the purpose of replacing thiuram accelerators such as WILLINGTMTD, mainly because thiuram accelerators are prone to produce carcinogenic nitrosamines, while diphenylnitrosamines are not carcinogenic. Used in NR, SBR, EPDM, NBR systems, it can be used as a fast primary accelerator or secondary accelerator. It is safer and has a longer anti-scorch time than WILLINGTMTD. It is sometimes used as a PVC rubber vulcanization inhibitor.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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