天堂网亚洲,天天操天天搞,91视频高清,菠萝蜜视频在线观看入口,美女视频性感美女视频,95丝袜美女视频国产,超高清美女视频图片

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-Hydroxyphenylacetic acid 3-Hydroxyphenylacetic acid 621-37-4 C8H8O3
Sodium xylenesulfonate Sodium xylenesulfonate 1300-72-7 C8H9NaO3S
2-Fluoro-5-methylbenzaldehyde 2-Fluoro-5-methylbenzaldehyde 93249-44-6 C8H7FO
Coumarin 120 Coumarin 120 26093-31-2 C10H9NO2
Tetrapropylammonium bromide Tetrapropylammonium bromide 1941-30-6 C12H28BrN
CHES CHES 103-47-9 C8H17NO3S
(4-CHLORO-BENZYL)-METHYL-AMINE (4-CHLORO-BENZYL)-METHYL-AMINE 104-11-0 C8H10ClN
N,N'-Diisopropylcarbodiimide N,N'-Diisopropylcarbodiimide 693-13-0 C7H14N2
TRIPHENYLFLUOROSILANE TRIPHENYLFLUOROSILANE 379-50-0 C18H15FSi
5-Chlorothiophene-2-sulfonyl chloride 5-Chlorothiophene-2-sulfonyl chloride 2766-74-7 C4H2Cl2O2S2
2-Amino-5-nitrobenzoic acid 2-Amino-5-nitrobenzoic acid 616-79-5 C7H6N2O4
Bis(pinacolato)diboron Bis(pinacolato)diboron 73183-34-3 C12H24B2O4
Ethyl 2-chloronicotinate Ethyl 2-chloronicotinate 1452-94-4 C8H8ClNO2
N,O-BIS(TRIFLUOROACETYL)HYDROXYLAMINE N,O-BIS(TRIFLUOROACETYL)HYDROXYLAMINE 684-78-6 C4HF6NO3
Benzyltriethylammonium bromide Benzyltriethylammonium bromide 5197-95-5 C13H22BrN
4-Pyridineboronic acid pinacol ester 4-Pyridineboronic acid pinacol ester 181219-01-2 C11H16BNO2
HEXYLTRICHLOROSILANE HEXYLTRICHLOROSILANE 928-65-4 C6H13Cl3Si
1-(4-ACETYLPHENYL)-2-THIOUREA 1-(4-ACETYLPHENYL)-2-THIOUREA 71680-92-7 C9H10N2OS
2,4,6-Trichlorobenzoyl chloride 2,4,6-Trichlorobenzoyl chloride 4136-95-2 C7H2Cl4O
3-(TRIFLUOROMETHYL)PHENYLTHIOUREA 3-(TRIFLUOROMETHYL)PHENYLTHIOUREA 1736-70-5 C8H7F3N2S
Adipic dihydrazide Adipic dihydrazide 1071-93-8 C6H14N4O2
4-Chlorobenzonitrile 4-Chlorobenzonitrile 623-03-0 C7H4ClN
2-NITROANILINE-4-SULFONIC ACID SODIUM SALT 2-NITROANILINE-4-SULFONIC ACID SODIUM SALT 5042-33-1 C6H5N2NaO5S
2-Iodophenylacetic acid 2-Iodophenylacetic acid 18698-96-9 C8H7IO2
Cyclopropanecarboxaldehyde Cyclopropanecarboxaldehyde 1489-69-6 C4H6O
Phthalhydrazide Phthalhydrazide 1445-69-8 C8H6N2O2
Tetraethylammonium Chloride Tetraethylammonium Chloride 56-34-8 C8H20ClN
4-HYDROXY-3-(TRIFLUOROMETHYL)BENZALDEHYDE 4-HYDROXY-3-(TRIFLUOROMETHYL)BENZALDEHYDE 220227-98-5 C8H5F3O2
3,4'-DIAMINODIPHENYLMETHANE 3,4'-DIAMINODIPHENYLMETHANE 19430-83-2 C13H14N2
Tributyl borate Tributyl borate 688-74-4 C12H27BO3
11-Bromo-1-undecanol 11-Bromo-1-undecanol 1611-56-9 C11H23BrO
m-Phthalaldehyde m-Phthalaldehyde 626-19-7 C8H6O2
(4-FLUORO-BENZYL)-METHYL-AMINE (4-FLUORO-BENZYL)-METHYL-AMINE 405-66-3 C8H10FN
DIATOMACEOUS EARTH DIATOMACEOUS EARTH 68855-54-9 O2Si
m-Anisidine m-Anisidine 536-90-3 C7H9NO
3-Hydroxyphenylboronic acid 3-Hydroxyphenylboronic acid 87199-18-6 C6H7BO3
3-Methoxyphenylboronic acid 3-Methoxyphenylboronic acid 10365-98-7 C7H9BO3
(4-BOC-AMINOPHENYL)BORONIC ACID (4-BOC-AMINOPHENYL)BORONIC ACID 380430-49-9 C11H16BNO4
4,4-Difluorocyclohexanecarboxylic acid 4,4-Difluorocyclohexanecarboxylic acid 122665-97-8 C7H10F2O2
POLYANETHOLESULFONIC ACID SODIUM SALT POLYANETHOLESULFONIC ACID SODIUM SALT 52993-95-0 C6H12Na2O6S4
1,4,7-Triazacyclononane 1,4,7-Triazacyclononane 4730-54-5 C6H15N3
2,4'-Dibromoacetophenone 2,4'-Dibromoacetophenone 99-73-0 C8H6Br2O
N-Hydroxyethylphthalimide N-Hydroxyethylphthalimide 3891-07-4 C10H9NO3
2-Bromo-6-methoxynaphthalene 2-Bromo-6-methoxynaphthalene 5111-65-9 C11H9BrO
4-Nitrobenzoic acid 4-Nitrobenzoic acid 62-23-7 C7H5NO4
3,5-Dibromobenzaldehyde 3,5-Dibromobenzaldehyde 56990-02-4 C7H4Br2O
3-Chloroperoxybenzoic acid 3-Chloroperoxybenzoic acid 937-14-4 C7H5ClO3
3,5-Di-tert-butylsalicylaldehyde 3,5-Di-tert-butylsalicylaldehyde 37942-07-7 C15H22O2
1-Bromo-4-ethoxy-2,3-difluorobenzene 1-Bromo-4-ethoxy-2,3-difluorobenzene 156573-09-0 C8H7BrF2O
4-Bromophenyl methyl sulfone 4-Bromophenyl methyl sulfone 3466-32-8 C7H7BrO2S
3-Chloropropylmethyldichlorosilane 3-Chloropropylmethyldichlorosilane 7787-93-1 C4H9Cl3Si
4-Trifluoromethoxyphenylboronic acid 4-Trifluoromethoxyphenylboronic acid 139301-27-2 C7H6BF3O3
3-CYANOBENZYL ALCOHOL 3-CYANOBENZYL ALCOHOL 874-97-5 C8H7NO
3-Ethoxycarbonylphenylboronic acid 3-Ethoxycarbonylphenylboronic acid 4334-87-6 C9H11BO4
Cyclopropanecarbonyl Chloride Cyclopropanecarbonyl Chloride 4023-34-1 C4H5ClO
4'-Iodoacetophenone 4'-Iodoacetophenone 13329-40-3 C8H7IO
2-(Trimethylsilyl)ethanol 2-(Trimethylsilyl)ethanol 2916-68-9 C5H14OSi
Methyltriphenylphosphonium iodide Methyltriphenylphosphonium iodide 2065-66-9 C19H18IP
Methyl malonyl chloride Methyl malonyl chloride 37517-81-0 C4H5ClO3
1-Boc-3-(Aminomethyl)azetidine 1-Boc-3-(Aminomethyl)azetidine 325775-44-8 C9H18N2O2
4-Methylphenylacetic acid 4-Methylphenylacetic acid 622-47-9 C9H10O2
Borane-methyl sulfide complex Borane-methyl sulfide complex 13292-87-0 C2H10BS
4-FLUORO-2-(TRIFLUOROMETHYL)BENZENEBORONIC ACID 4-FLUORO-2-(TRIFLUOROMETHYL)BENZENEBORONIC ACID 182344-16-7 C7H5BF4O2
Ethyl diethoxyacetate Ethyl diethoxyacetate 6065-82-3 C8H16O4
Acetylacetaldehyde dimethyl acetal Acetylacetaldehyde dimethyl acetal 5436-21-5 C6H12O3
2-(Trifluoromethyl)benzoic acid 2-(Trifluoromethyl)benzoic acid 433-97-6 C8H5F3O2
2,4,5-Trichlorophenol 2,4,5-Trichlorophenol 95-95-4 C6H3Cl3O
DIPHENYL DISULFIDE DIPHENYL DISULFIDE 882-33-7 C12H10S2
Methyl 3-hydroxybenzoate Methyl 3-hydroxybenzoate 19438-10-9 C8H8O3
3-Cyanobenzoic acid 3-Cyanobenzoic acid 1877-72-1 C8H5NO2
3-Bromophenylboronic acid 3-Bromophenylboronic acid 89598-96-9 C6H6BBrO2
5-Fluoro-2-methylphenylboronic acid 5-Fluoro-2-methylphenylboronic acid 163517-62-2 C7H8BFO2
2-Chloro-5-trifluoromethylbenzaldehyde 2-Chloro-5-trifluoromethylbenzaldehyde 82386-89-8 C8H4ClF3O
3,5-Dichlorobenzoic acid 3,5-Dichlorobenzoic acid 51-36-5 C7H4Cl2O2
tert-Butyldimethylsilyl chloride tert-Butyldimethylsilyl chloride 18162-48-6 C6H15ClSi
3-Methylanthranilic acid 3-Methylanthranilic acid 4389-45-1 C8H9NO2
3,4,5-Trimethoxybenzaldehyde 3,4,5-Trimethoxybenzaldehyde 86-81-7 C10H12O4
Dimethyl malonate Dimethyl malonate 108-59-8 C5H8O4
2-Bromo-3-nitrobenzoic acid 2-Bromo-3-nitrobenzoic acid 573-54-6 C7H4BrNO4
2,6-Dichlorobenzyl acetonitrile 2,6-Dichlorobenzyl acetonitrile 3215-64-3 C8H5Cl2N
Methyltriethoxysilane Methyltriethoxysilane 2031-67-6 C7H18O3Si
2-Bromoethanol 2-Bromoethanol 540-51-2 C2H5BrO
2,4,6-Trichlorophenol 2,4,6-Trichlorophenol 88-06-2 C6H3Cl3O
1,2-Benzisoxazole-3-methanesulfonic acid sodium salt 1,2-Benzisoxazole-3-methanesulfonic acid sodium salt 73101-64-1 C8H8NNaO4S
Zinc benzenesulfinate dihydrate Zinc benzenesulfinate dihydrate 24308-84-7 C12H14O6S2Zn
Aminoguanidine bicarbonate Aminoguanidine bicarbonate 2582-30-1 C2H8N4O3
3-(Methylthio)phenylboronic acid 3-(Methylthio)phenylboronic acid 128312-11-8 C7H9BO2S
m-Toluic acid m-Toluic acid 99-04-7 C8H8O2
(3,4-Dimethoxyphenyl)acetic acid (3,4-Dimethoxyphenyl)acetic acid 93-40-3 C10H12O4
3-PYRIDINECARBOXAMIDINE 3-PYRIDINECARBOXAMIDINE 23255-20-1 C6H7N3
4-Iodo-3-methylbenzoic acid 4-Iodo-3-methylbenzoic acid 52107-87-6 C8H7IO2
2,4-Dichlorobenzyl alcohol 2,4-Dichlorobenzyl alcohol 1777-82-8 C7H6Cl2O
3,4-Dichlorophenylboronic acid 3,4-Dichlorophenylboronic acid 151169-75-4 C6H5BCl2O2
1,6-Hexanediol 1,6-Hexanediol 629-11-8 C6H14O2
2-Fluorobenzenesulfonyl chloride 2-Fluorobenzenesulfonyl chloride 2905-21-7 C6H4ClFO2S
Cyclohexanecarboxylic acid chloride Cyclohexanecarboxylic acid chloride 2719-27-9 C7H11ClO
Sodium 1-octanesulfonate Sodium 1-octanesulfonate 5324-84-5 C8H17NaO3S
Ethyl glyoxalate Ethyl glyoxalate 924-44-7 C4H6O3
3-Chloroanisole 3-Chloroanisole 2845-89-8 C7H7ClO
3-Aminoacetophenone 3-Aminoacetophenone 99-03-6 C8H9NO
HomePage | Member Companies | Advertising | Contact us | Previous WebSite | MSDS | CAS Index | CAS DataBase
Copyright © 2016 ChemicalBook All rights reserved.