娆ф床鎬ф劅妯$壒『网址:ff00.co』鎬ф劅娉宠鍒濅腑濂崇敓妯$壒,鎬ф劅缇庡コ鎯呰叮鍥剧墖,鎬ф劅缇庡コ娉″鏌旀妧-F2F4Y5L8-2022-09-29 10:13

Products
  • Products
  • Encyclopedia
  • Buy offers
  • Suppliers
Home>products> Catalyst and Auxiliary : 10186 Products found filters

鎴戠殑鎬ф劅濡堝鏄牎闀俊和?ff00.co』缃戜笂鏈€鎬ф劅缇庡コ鍥?椤剁骇鎬ф劅缇庡コ鑹宠垶dj,鎬ф劅濂崇鍐呰¥-F2F4Y5L8-2022-09-29 10:13

Catalyst refers to a substance that can change the rate of chemical reaction but does not consume in the reaction itself. It can also act on plants and change the growth rate of plants. According to the definition of the International Union of Pure and Applied Chemistry in 1981:Catalyst is a substance that changes the reaction rate but does not change the Gibbs free energy of the general standard of reaction. It is a very stable substance, its own composition, chemical properties and quality will not change before and after the reaction, and its relationship with the reaction system is like a lock and a key, with a high degree of selectivity, also known as specificity. It is mainly reflected in: 1. A catalyst does not catalyze all chemical reactions   2.Some chemical reactions are not the only catalyst   3.A chemical reaction has more than one catalyst.
There are many kinds of catalysts, which can be divided into liquid catalyst and solid catalyst according to the state, main catalyst and co-catalyst according to the size of the action, polymerization, Polycondensation, oxidation, reduction and other catalysts according to the type of reaction. According to the phase state of the reaction system, it can be divided into homogeneous catalyst and heterogeneous catalyst, in which the homogeneous catalyst is acid, alkali, soluble transition metal compound and peroxide catalyst, and the heterogeneous catalyst is metal catalyst, biocatalyst, nanometer catalyst and so on.
And catalysts are widely used and play an important role in chemical production, scientists' experiments and life activities. Some industrial production, such as winemaking and pharmaceuticals, also require catalysts. So the development power of the catalyst is still considerable.


In medicine, auxiliaries are defined as excipients and additives used in the production and formulation of drugs, that is, the general name of all materials except the main active components of drugs, and is an important part of pharmaceutical preparations. In industrial production, auxiliary chemicals added to improve the production process, to improve product quality and output, or to give the product a unique application performance. Also known as additives. However, as an important component of the product matrix, high-dose supplements, which have a significant impact on the morphology, structure and properties of the product, generally do not fall into the category of auxiliaries. According to the function and function of auxiliaries, they can be divided into five categories: synthetic auxiliaries, cross-linking auxiliaries, functional auxiliaries, stability auxiliaries and process auxiliaries.
The auxiliaries should have good compatibility with the synthetic resin added, and can be stable and uniformly dispersed in the resin for a long time. When in use, plastic auxiliaries that can promote the function of each other should be selected as far as possible. to be able to use the requirements of the use of products, to be able to have good adaptability to processing conditions, to be able to disperse uniformly in the process of processing and molding, and must be durable and non-volatile. When using, we should also pay attention to the dosage of auxiliaries.
Most of the auxiliaries are dangerous chemicals, some are flammable and explosive, and some are toxic. The new technology has continuously improved the performance requirements of auxiliaries, which has promoted the rapid development of the auxiliaries industry, and is bound to enter a new era of technological innovation, increase in varieties, advanced performance and friendly environment. High efficiency, functionalization, compounding, refinement, specialization, serialization, energy saving and environmental protection have become the general trend of the development of modern adhesive additives.
Auxiliaries can also be divided into auxiliaries to improve processing properties, such as lubricants, stabilizers, processing aids, etc.; change mechanical properties, such as plasticizers, toughening agents, etc.; improve optical properties, such as pigments, dyes, etc.; improve aging properties, such as antioxidants, anti-mildew agents, etc.; improve surface properties, such as antistatic agents, wear resistant agents, etc.; reduce costs, such as diluents, solvents, fillers, etc. Improve other properties, such as foaming agent, combustion promoter, etc.

+more
Bis(1-hydroxy-1H-pyridine-2-thionato-O,S)copper
  • Broad-spectrum fungicides and pollution-free marine biocides; used in marine antifouling paints, architectural coatings, metal processing, pesticides, etc.
  • CAS No: 14915-37-8
  • Molecular Weight: 315.85872
  • Molecular Formula:C10H8CuN2O2S2
  • Boiling Point:253.8 °C at 760 mmHg
  • Flash Point:107.3 °C
Encyclopedia Safety and Handling MSDS 99 Suppliers Request For Quotation
Sodium diethyldithiocarbamate
  • Ditiocarb sodium (Sodium diethyldithiocarbamate) is an accelerator of the rate of copper cementation. Sodium diethyldithiocarbamate reduces the incidence of HIV infection.
  • CAS No: 148-18-5
  • Molecular Weight: 172.26731
  • Molecular Formula:C5H10NNaS2
  • Density:1.086
  • Boiling Point:176.4°Cat760mmHg
  • Flash Point:60.5°C
Encyclopedia Safety and Handling MSDS NMR Spectrum Synthesis Route 111 Suppliers Request For Quotation
Nickel carbonate
  • Nickel carbonate is a light green crystalline substance, which is almost insoluble (0.093 g/L) in water (25°C), nonsoluble in hot water, and soluble in acids. Nickel carbonate is available primarily as basic nickel carbonate (NiCO3· 2Ni(OH)2 · 4H2O), which is not soluble in water and soluble in ammo..
  • CAS No: 3333-67-3
  • Molecular Weight: 118.7023
  • Molecular Formula:CNiO3
  • Density:4.39 g/cu m
  • Boiling Point:333.6°Cat760mmHg
  • Flash Point:169.8°C
Encyclopedia Safety and Handling MSDS 160 Suppliers Request For Quotation
Triazol-3-amine
  • white powder or crystals Amitrole is a colorless to off-white crystallinesolid or white powder. Odorless when pure.
  • CAS No: 61-82-5
  • Molecular Weight: 84.07996
  • Molecular Formula:C2H4N4
  • Density:1.138
  • Boiling Point:244.9°C at 760 mmHg
  • Flash Point:101.9°C
Encyclopedia Safety and Handling MSDS NMR Spectrum Synthesis Route 165 Suppliers Request For Quotation
2-Butyl-1,2-benzisothiazolin-3-one; 4299-07-4 structural formula
2-Butyl-1,2-benzisothiazolin-3-one
  • CAS No: 4299-07-4
  • Molecular Weight: 232.27988
  • Molecular Formula:C11H13NOS
  • Density:1.177
  • Boiling Point:332.921 °C at 760 mmHg
  • Flash Point:332.921 °C at 760 mmHg
Encyclopedia Safety and Handling MSDS Synthesis Route 34 Suppliers Request For Quotation
Cholesterol; 57-88-5 structural formula
Cholesterol
  • Cholesterol is the major sterol in mammals, and its importance in fundamental cellular processes is becoming more appreciated. IC50 value:Target:In vitro: GT1-7 hypothalamic cells subjected to cholesterol depletion in vitro produced 20-31% reductions in cellular cholesterol content, similar to the d..
  • CAS No: 57-88-5
  • Molecular Weight: 386.65354
  • Molecular Formula:C27H46O
  • Density:1.06
  • Boiling Point:360℃
  • Flash Point:250℃
Encyclopedia Safety and Handling MSDS NMR Spectrum Synthesis Route 339 Suppliers Request For Quotation
Perfluorotributylamine; 311-89-7 structural formula
Perfluorotributylamine
  • clear colourless liquid
  • CAS No: 311-89-7
  • Molecular Weight: 671.091986
  • Molecular Formula:C12F27N
  • Density:1.883
  • Boiling Point:173-181℃
  • Flash Point:64.1 °C
Encyclopedia Safety and Handling MSDS NMR Spectrum Synthesis Route 110 Suppliers Request For Quotation
Heptadecafluorooctanesulfonic acid tetraethylammonium salt; 56773-42-3 structural formula
Heptadecafluorooctanesulfonic acid tetraethylammonium salt
  • White powder
  • CAS No: 56773-42-3
  • Molecular Weight: 629.372754
  • Molecular Formula:C16H20F17NO3S
Encyclopedia Safety and Handling MSDS 72 Suppliers Request For Quotation
Perfluorooctyl iodide; 507-63-1 structural formula
Perfluorooctyl iodide
  • clear light pink liquid after melting
  • CAS No: 507-63-1
  • Molecular Weight: 545.962924
  • Molecular Formula:C8F17I
  • Density:2.067
  • Boiling Point:160-161℃
  • Flash Point:2.004 g/cm3
Encyclopedia Safety and Handling MSDS NMR Spectrum Synthesis Route 60 Suppliers Request For Quotation
Trifluoromethanesulfonic anhydride; 358-23-6 structural formula
Trifluoromethanesulfonic anhydride
  • clear colorless to light brown liquid
  • CAS No: 358-23-6
  • Molecular Weight: 282.138819
  • Molecular Formula:C2F6O5S2
  • Density:1.677
  • Boiling Point:80-83℃ (745 mmHg)
  • Flash Point:12.3°C
Encyclopedia Safety and Handling MSDS NMR Spectrum Synthesis Route 246 Suppliers Request For Quotation
PERFLUOROHEXANESULFONIC ACID POTASSIUM SALT; 3871-99-6 structural formula
PERFLUOROHEXANESULFONIC ACID POTASSIUM SALT
  • White to faint beige solid
  • CAS No: 3871-99-6
  • Molecular Weight: 438.201
  • Molecular Formula:C6F13KO3S
  • Boiling Point:°Cat760mmHg
  • Flash Point:°C
Encyclopedia Safety and Handling MSDS Synthesis Route 43 Suppliers Request For Quotation
1H,1H,2H,2H-PERFLUOROOCTANESULFONIC ACID; 27619-97-2 structural formula
1H,1H,2H,2H-PERFLUOROOCTANESULFONIC ACID
  • CAS No: 27619-97-2
  • Molecular Weight: 428.167742
  • Molecular Formula:C8H5F13O3S
  • Density:1,25
  • Boiling Point:221.2°C at 760 mmHg
  • Flash Point:87.6°C
Encyclopedia Safety and Handling MSDS NMR Spectrum 14 Suppliers Request For Quotation
Perfluorooctane; 307-34-6 structural formula
Perfluorooctane
  • colourless liquid
  • CAS No: 307-34-6
  • Molecular Weight: 438.059
  • Molecular Formula:C8F18
  • Density:1.766
  • Boiling Point:103-104℃
  • Flash Point:30.7 °C
Encyclopedia Safety and Handling MSDS NMR Spectrum Synthesis Route 83 Suppliers Request For Quotation
1H,1H,7H-DODECAFLUORO-1-HEPTANOL; 335-99-9 structural formula
1H,1H,7H-DODECAFLUORO-1-HEPTANOL
  • clear colorless liquid
  • CAS No: 335-99-9
  • Molecular Weight: 332.089
  • Molecular Formula:C7H4F12O
  • Density:1.76
  • Boiling Point:169-170℃
  • Flash Point:52.5 °C
Encyclopedia Safety and Handling MSDS Synthesis Route 30 Suppliers Request For Quotation
1H,1H,2H,2H-PERFLUORO-1-OCTANOL; 647-42-7 structural formula
1H,1H,2H,2H-PERFLUORO-1-OCTANOL
  • CLEAR COLOURLESS LIQUID
  • CAS No: 647-42-7
  • Molecular Weight: 364.106
  • Molecular Formula:C8H5F13O
  • Density:1.651
  • Boiling Point:88-95℃ (28 mmHg)
  • Flash Point:91℃
Encyclopedia Safety and Handling MSDS NMR Spectrum Synthesis Route 60 Suppliers Request For Quotation
Platinum(0)-1,3-divinyl-1,1,3,3-tetramethyldisiloxane; 68478-92-2 structural formula
Platinum(0)-1,3-divinyl-1,1,3,3-tetramethyldisiloxane
  • pale yellow solution
  • CAS No: 68478-92-2
  • Molecular Weight: 381.485
  • Molecular Formula:C8H18OPtSi2
  • Density:0.855
  • Boiling Point:138℃
  • Flash Point:86?
Encyclopedia Safety and Handling MSDS NMR Spectrum 58 Suppliers Request For Quotation
Palladium (II) Acetate; 3375-31-3 structural formula
Palladium (II) Acetate
  • brown needles
  • CAS No: 3375-31-3
  • Molecular Weight: 224.508
  • Molecular Formula:C4H6O4Pd
  • Density:0.9840
  • Boiling Point:117.1°C at 760 mmHg
  • Flash Point:40°C
Encyclopedia Safety and Handling MSDS 254 Suppliers Request For Quotation
Chloroplantinic acid; 16941-12-1 structural formula
Chloroplantinic acid
  • In platinum plating, photography, platinum mirrors, platinum luster on glass and porcelain, platinized carbon for acetic acid manufacture; platinizing pumice stone or asbestos, as catalyst in manufacture of SO3; indelible ink; relief etching of zinc for artistic and commercial purposes; fixing micro..
  • CAS No: 16941-12-1
  • Molecular Weight: 195.078
  • Molecular Formula:Pt
  • Density:2.43
  • Boiling Point:°Cat760mmHg
  • Flash Point:°C
Encyclopedia Safety and Handling MSDS 120 Suppliers Request For Quotation
Rhodium(II) octanoate dimer; 73482-96-9 structural formula
Rhodium(II) octanoate dimer
  • Green Powder
  • CAS No: 73482-96-9
  • Molecular Weight: 778.63
  • Molecular Formula:C32H64O8Rh2
  • Boiling Point:239.3°C at 760 mmHg
  • Flash Point:107.4°C
Encyclopedia Safety and Handling MSDS 93 Suppliers Request For Quotation
Palladium chloride; 7647-10-1 structural formula
Palladium chloride
  • Palladium chloride is a dark brown powder, hygroscopic (absorbs moisture from the air). It is incompatible with acids, aluminium, ammonia, magnesium, nitrates, zinc, heat, thiocyanates, and organic solvents. Thermal decomposition of palladium chloride may release chlorine, hydrogen chloride, and oxi..
  • CAS No: 7647-10-1
  • Molecular Weight: 177.32
  • Molecular Formula:Cl2Pd
  • Density:4
  • Boiling Point:100℃
Encyclopedia Safety and Handling MSDS 277 Suppliers Request For Quotation
<Pre12345..100Next >
远野av 国产特黄特色AV av奇米加勒比 苍井空av下载 秋霞鲁丝Av无码片
巨乳教师av种子 下载 av化妆师的要求 天宫真奈美av作品番号 日本漂亮av女优排名 日本av名单
短发av 麻生希解禁av作品 av网站japanese 女同av大片 加勒比系列av
av狼网 日本全部AV男演员 色婷婷av百度 91av福利视预在线 动漫改编av