一二三四区视频,亚洲少妇熟女色,日本久热无码视频网,欧美国产日韩大尺度,亚洲a视频,久久少妇一区二区,日韩999无码视频,刺激久久久久久久,啊啊啊啊不要啊在线

Chemical Reagents

Chemicals reagents are commonly referred to as reagent. It is a large class of pure chemical substances with various standard purities and can be used for education, scientific research, analysis and testing as well as the functional materials and raw materials required by some kinds of novel industrial materials. There is a large variety of chemical reagents and the number has reached hundreds of thousands in the world. There are also tens of thousands of reagents that have been used in daily life in china.
There is still no uniform international rules in the classification methods for chemicals. It is customary divided by subject and actual application. Take the representative catalog issued by the Germany E • Merck Company as example, there are twelve categories and seventy categories while in most countries, it is divided with the scope of application. We divide the reagents into four categories.

1. General reagents: generally refers to inorganic reagents and organic reagents that can meet standard purity. It is often applied to scientific research, analysis and testing, and synthetic reaction and used as new materials.

2. Analysis Reagents: regent dedicated to analysis and test and can be divided into two subcategories:
(1) Reagents for chemical analysis: testing items for the chemical reaction analysis.
      1) Baseline Reagent: pure compound directly used for the standard solution in the formulation and volumetric analysis.
      2) Indicator: it can be used to indicate the end of the titration reagent and can be classified into pH indicator, redox indicator adsorption indicator, metal indicator, a fluorescent indicator, and so on.
(2) Regents for instrument analysis: high-purity compounds dedicated to instrumental analysis.
       1) Spectroscopically pure reagents: spectroscopically pure compound, often expressed in the SP for spectral analysis reagents.
        2) Chromatography pure reagents: reagents dedicated to analysis of gas chromatography and liquid chromatography analysis.
       3) Deuterated reagents: reagent decided to the analysis of the nuclear resonance instrument.

3. Reagents of electronics industry: special chemical products dedicated to electronics industry.
1)  MOS Reagents: the particle concentration is consistent with ASTM "O" level, being microelectronics dedicated reagent.
2)  high-purity reagents: also known as ultra high purity reagents such as purity of 99.99%, called 4N, 99.999% referred to 5N. They are generally used for scientific research and physical and chemical trace analysis, fiber-optic communications, microelectronics, semiconductors, lasers and so on.
3)  In addition, there are also optically pure reagents, photoresist and other kinds of fine chemical products of special properties.

4. Biochemical reagents: they are basic chemical substances extracted from living organisms or chemically synthesized and is a large type of reagent as important reagents for biological component research and analysis and identification including clinical immunology reagents, genetic engineering reagent, cell culture reagents, hormone-type substances, reagent for poison carcinogenic research and reagent for anti-mold and insecticide research. In short, they are reagents for scientific research such as exploring the mysteries of life and disease prevention as well as testing agents, being pure compound related to medicine and pharmacology.

Click on the specific product, view the latest prices of the products, information, serving information
Structure Chemical Name CAS MF
3,5,6-Trichlorosalicylic acid 3,5,6-Trichlorosalicylic acid 40932-60-3 C7H3Cl3O3
3,5-DIMETHYLTHIOPHENOL 3,5-DIMETHYLTHIOPHENOL 38360-81-5 C8H10S
1H,1H,2H-Perfluoro-1-decene 1H,1H,2H-Perfluoro-1-decene 21652-58-4 C10H3F17
Pregnenolone acetate Pregnenolone acetate 1778-02-5 C23H34O3
N-PHENYLBENZAMIDINE N-PHENYLBENZAMIDINE 1527-91-9 C13H12N2
Diethyl cyanophosphonate Diethyl cyanophosphonate 2942-58-7 C5H10NO3P
TRIMETHYLSULFONIUM HYDROXIDE TRIMETHYLSULFONIUM HYDROXIDE 17287-03-5 C3H10OS
Benzylboronic acid Benzylboronic acid 4463-42-7 C7H9BO2
4-N-PROPYLBENZENESULFONYL CHLORIDE 4-N-PROPYLBENZENESULFONYL CHLORIDE 146949-07-7 C9H11ClO2S
3-ISOPROPOXYPHENYLBORONIC ACID 3-ISOPROPOXYPHENYLBORONIC ACID 216485-86-8 C9H13BO3
1-Hexyl-3-methylimidazolium tetrafluoroborate 1-Hexyl-3-methylimidazolium tetrafluoroborate 244193-50-8 C10H19BF4N2
2,3,6,7,10,11-HEXAMETHOXYTRIPHENYLENE 2,3,6,7,10,11-HEXAMETHOXYTRIPHENYLENE 808-57-1 C24H24O6
2,2,4-Trimethyl-1,3-pentanediol monoisobutyrate 2,2,4-Trimethyl-1,3-pentanediol monoisobutyrate 25265-77-4 C12H24O3
O-TOLYLUREA O-TOLYLUREA 614-77-7 C8H10N2O
QUINOLINE-4-BORONIC ACID QUINOLINE-4-BORONIC ACID 371764-64-6 C9H8BNO2
(3-Glycidoxypropyl)methyldiethoxysilane (3-Glycidoxypropyl)methyldiethoxysilane 2897-60-1 C11H24O4Si
2,6-DIBROMOANTHRACENE 2,6-DIBROMOANTHRACENE 186517-01-1 C14H8Br2
4-Methylstyrene 4-Methylstyrene 622-97-9 C9H10
2,4-Dichloro-5-nitrobenzotrifluoride 2,4-Dichloro-5-nitrobenzotrifluoride 400-70-4 C7H2Cl2F3NO2
AMINOTRIPHENYLSILANE AMINOTRIPHENYLSILANE 4215-80-9 C18H17NSi
(Chloromethylene)dimethyliminium chloride (Chloromethylene)dimethyliminium chloride 3724-43-4 C3H7ClN.Cl
3-Iodophenylboronic acid 3-Iodophenylboronic acid 221037-98-5 C6H6BIO2
1-Eicosanol 1-Eicosanol 629-96-9 C20H42O
4'-BROMO-3-CHLOROPROPIOPHENONE 4'-BROMO-3-CHLOROPROPIOPHENONE 31736-73-9 C9H8BrClO
3-CHLORO-5-FLUOROPHENYLACETIC ACID 3-CHLORO-5-FLUOROPHENYLACETIC ACID 202001-00-1 C8H6ClFO2
2,4,6,8-Tetramethylcyclotetrasiloxane 2,4,6,8-Tetramethylcyclotetrasiloxane 2370-88-9 C4H16O4Si4
AZELAIC ACID MONOMETHYL ESTER AZELAIC ACID MONOMETHYL ESTER 2104-19-0 C10H18O4
1-Phenylcyclopentanecarboxylic acid 1-Phenylcyclopentanecarboxylic acid 77-55-4 C12H14O2
BENZYLIDENEMALONONITRILE BENZYLIDENEMALONONITRILE 2700-22-3 C10H6N2
DICHLOROMETHOXYACETIC ACID METHYL ESTER DICHLOROMETHOXYACETIC ACID METHYL ESTER 17640-25-4 C4H6Cl2O3
2,6-Bis(hydroxymethyl)-p-cresol 2,6-Bis(hydroxymethyl)-p-cresol 91-04-3 C9H12O3
LAUROPHENONE LAUROPHENONE 1674-38-0 C18H28O
1-Naphthol-3,6-disulfonic acid disodium salt 1-Naphthol-3,6-disulfonic acid disodium salt 20349-39-7 C10H9NaO7S2
1,4-BIS(TRIMETHYLSILYL)-1,3-BUTADIYNE 1,4-BIS(TRIMETHYLSILYL)-1,3-BUTADIYNE 4526-07-2 C10H18Si2
1-ETHYL-3-PHENYL-2-THIOUREA 1-ETHYL-3-PHENYL-2-THIOUREA 3955-58-6 C9H12N2S
DIMETHYLTHEXYLSILYL CHLORIDE DIMETHYLTHEXYLSILYL CHLORIDE 67373-56-2 C8H19ClSi
CARBAMOYL-DL-ASPARTIC ACID CARBAMOYL-DL-ASPARTIC ACID 923-37-5 C5H8N2O5
4'-Aminobenzo-15-crown-5-ether 4'-Aminobenzo-15-crown-5-ether 60835-71-4 C14H21NO5
Dimethylolurea Dimethylolurea 140-95-4 C3H8N2O3
N-METHYLTHIOUREA N-METHYLTHIOUREA 598-52-7 C2H6N2S
MORPHOLIN-4-YL-ACETIC ACID MORPHOLIN-4-YL-ACETIC ACID 3235-69-6 C6H11NO3
(CHLOROMETHYL)TRIPHENYLPHOSPHONIUM CHLORIDE (CHLOROMETHYL)TRIPHENYLPHOSPHONIUM CHLORIDE 5293-84-5 C19H17Cl2P
Hydroxypropyl acrylate Hydroxypropyl acrylate 25584-83-2 C6H10O3
COPPER(I) TRIFLUOROMETHANESULFONATE BENZENE COMPLEX (2:1) COPPER(I) TRIFLUOROMETHANESULFONATE BENZENE COMPLEX (2:1) 37234-97-2 C8H2Cu2F6O6S2
1,2-BUTANEDIOL 1,2-BUTANEDIOL 584-03-2 C4H10O2
4-Bromomethyl-3-nitrobenzoic acid 4-Bromomethyl-3-nitrobenzoic acid 55715-03-2 C8H6BrNO4
7-OCTENYLDIMETHYLCHLOROSILANE 7-OCTENYLDIMETHYLCHLOROSILANE 17196-12-2 C10H21ClSi
4-METHOXYCHALCONE 4-METHOXYCHALCONE 959-33-1 C16H14O2
2,2-Diphenylpropionitrile 2,2-Diphenylpropionitrile 5558-67-8 C15H13N
3-(2-CHLOROPHENYL)PROPIONIC ACID 3-(2-CHLOROPHENYL)PROPIONIC ACID 1643-28-3 C9H9ClO2
3-HYDROXY-2-NAPHTHOIC ACID HYDRAZIDE 3-HYDROXY-2-NAPHTHOIC ACID HYDRAZIDE 5341-58-2 C11H10N2O2
TRANS-2-PHENYL-1-CYCLOPROPANECARBOXYLIC ACID TRANS-2-PHENYL-1-CYCLOPROPANECARBOXYLIC ACID 939-90-2 C10H10O2
3,5-DIMETHOXYPHENYLACETIC ACID 3,5-DIMETHOXYPHENYLACETIC ACID 4670-10-4 C10H12O4
(3-ACRYLOXYPROPYL)METHYLDIMETHOXYSILANE (3-ACRYLOXYPROPYL)METHYLDIMETHOXYSILANE 13732-00-8 C9H18O4Si
DIXYLYL SULFONE DIXYLYL SULFONE 27043-27-2 C16H18O2S
2-Bromo-2',4'-difluoroacetophenone 2-Bromo-2',4'-difluoroacetophenone 102429-07-2 C8H5BrF2O
3-Methoxy-1-butanol 3-Methoxy-1-butanol 2517-43-3 C5H12O2
Butyl chloroformate Butyl chloroformate 592-34-7 C5H9ClO2
3-(TRIMETHYLSILYL) PROPIONIC ACID 3-(TRIMETHYLSILYL) PROPIONIC ACID 5683-30-7 C6H14O2Si
4-CUMYLPHENOL 4-CUMYLPHENOL 599-64-4 C15H16O
Trichloropropylsilane Trichloropropylsilane 141-57-1 C3H7Cl3Si
2-CHLOROBENZALDEHYDE THIOSEMICARBAZONE 2-CHLOROBENZALDEHYDE THIOSEMICARBAZONE 5706-78-5 C8H8ClN3S
ETHYL P-TOLYLACETATE ETHYL P-TOLYLACETATE 14062-19-2 C11H14O2
7-Bromoheptanenitrile 7-Bromoheptanenitrile 20965-27-9 C7H12BrN
1-Iodoheptane 1-Iodoheptane 4282-40-0 C7H15I
TRANS,TRANS,CIS-1,5,9-CYCLODODECATRIENE TRANS,TRANS,CIS-1,5,9-CYCLODODECATRIENE 706-31-0 C12H18
Chlorodiphenylmethylsilane Chlorodiphenylmethylsilane 144-79-6 C13H13ClSi
Cyclopropyl 2-thienyl ketone Cyclopropyl 2-thienyl ketone 6193-47-1 C8H8OS
Ethylurea Ethylurea 625-52-5 C3H8N2O
6-FLUOROVERATRALDEHYDE 6-FLUOROVERATRALDEHYDE 71924-62-4 C9H9FO3
3-PHENYLPROPIONITRILE 3-PHENYLPROPIONITRILE 645-59-0 C9H9N
Phenylmalonic acid Phenylmalonic acid 2613-89-0 C9H8O4
Sodium 2-(cyclohexylamino)ethanesulphonate Sodium 2-(cyclohexylamino)ethanesulphonate 3076-05-9 C8H16NNaO3S
4-Propoxybenzoic acid 4-Propoxybenzoic acid 5438-19-7 C10H12O3
BENZYL N-HYDROXYCARBAMATE BENZYL N-HYDROXYCARBAMATE 3426-71-9 C8H9NO3
alpha-Cyclopentylmandelic acid alpha-Cyclopentylmandelic acid 427-49-6 C13H16O3
2,6-DI-TERT-BUTYL-4-METHOXYPHENOL 2,6-DI-TERT-BUTYL-4-METHOXYPHENOL 489-01-0 C15H24O2
ETHYL 3-IODOBENZOATE ETHYL 3-IODOBENZOATE 58313-23-8 C9H9IO2
METHYLTRI-N-PROPOXYSILANE METHYLTRI-N-PROPOXYSILANE 5581-66-8 C10H24O3Si
3-Phenylpyruvic acid 3-Phenylpyruvic acid 156-06-9 C9H8O3
3,3'-DIHYDROXYDIPHENYL DISULFIDE 3,3'-DIHYDROXYDIPHENYL DISULFIDE 21101-56-4 C12H10O2S2
Ricinoleic acid Ricinoleic acid 141-22-0 C18H34O3
Phenyltrimethylammonium bromide Phenyltrimethylammonium bromide 16056-11-4 C9H14BrN
ETHYLMALONIC ACID ETHYLMALONIC ACID 601-75-2 C5H8O4
Ethyltrichlorosilane Ethyltrichlorosilane 115-21-9 C2H5Cl3Si
Hexachloroacetone Hexachloroacetone 116-16-5 C3Cl6O
2-Chlorobenzotrichloride 2-Chlorobenzotrichloride 2136-89-2 C7H4Cl4
Fumaryl chloride Fumaryl chloride 627-63-4 C4H2Cl2O2
Sodium 4-formylbenzenesulfonate Sodium 4-formylbenzenesulfonate 13736-22-6 C7H4NaO4S-
methyl 2,3-dihydroxybenzoate methyl 2,3-dihydroxybenzoate 2411-83-8 C8H8O4
TRICHLOROACETIC ANHYDRIDE TRICHLOROACETIC ANHYDRIDE 4124-31-6 C4Cl6O3
2-Chlorophenoxyacetic acid 2-Chlorophenoxyacetic acid 614-61-9 C8H7ClO3
Chloroform-d Chloroform-d 865-49-6 CCl3D
ETHYL 1,3-DITHIOLANE-2-CARBOXYLATE ETHYL 1,3-DITHIOLANE-2-CARBOXYLATE 20461-99-8 C6H10O2S2
trans-2,3-Dimethoxycinnamic acid trans-2,3-Dimethoxycinnamic acid 7345-82-6 C11H12O4
1,5-DIAMINO-2-METHYLPENTANE 1,5-DIAMINO-2-METHYLPENTANE 15520-10-2 C6H16N2
Dodecyl 4-methylbenzenesulfonate Dodecyl 4-methylbenzenesulfonate 10157-76-3 C19H32O3S
Methyl decanoate Methyl decanoate 110-42-9 C11H22O2
METHYL HEPTAFLUOROBUTYRATE METHYL HEPTAFLUOROBUTYRATE 356-24-1 C5H3F7O2
4-(1-PYRROLIDINO)BENZALDEHYDE 4-(1-PYRROLIDINO)BENZALDEHYDE 51980-54-2 C11H13NO
HomePage | Member Companies | Advertising | Contact us | Previous WebSite | MSDS | CAS Index | CAS DataBase
Copyright © 2016 ChemicalBook All rights reserved.
乐至县| 温宿县| 来宾市| 夏津县| 皮山县| 兴化市| 瓮安县| 古丈县| 吉林省| 五华县| 开阳县| 海伦市| 林芝县| 伊春市| 黑龙江省| 望奎县| 土默特左旗| 黎川县| 明光市| 含山县| 汤阴县| 淳化县| 肇东市| 繁峙县| 长沙县| 广州市| 麻阳| 阿巴嘎旗| 江门市| 衡东县| 巴楚县| 临邑县| 修水县| 新安县| 社旗县| 庆城县| 祁连县| 红原县| 新巴尔虎左旗| 崇州市| 龙江县|