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

Organic Chemistry

Organic Chemistry namely the industry including petrochemical industry using oil, natural gas as raw material, fermentation production of alcohol via food or solvent industry, using gasified feed gas and dry distilled recovered coal tar for production or fractionation of a variety of organic chemical products. In the organic chemical industry of our country, people first apply coal production of calcium carbide for occurrence of acetylene route, gasification synthesis of methanol, formaldehyde route and routes of recycling the benzene, naphthalene, anthracene from coal tar routes, together with alocohol production route from fermentation of rice and further develop.

The direct raw materials of basic organic chemical industry mainly include: hydrogen gas, carbon monoxide, aliphatic hydrocarbons (methane, ethylene, acetylene, propylene, C4 or more aliphatic hydrocarbons), aromatic hydrocarbons (benzene, toluene, xylene and ethylbenzene) and so on. From the pyrolysis gasoline, refinery gas and coal gas of low carbon alkane, crude oil or petroleum distillates, after separation, it may be made of aliphatic hydrocarbon raw material used for different purposes; from the catalytic reforming gasoline, the pyrolysis gasoline of the hydrocarbon and coal tar of dry distillation, we can isolate aromatic raw material; suitable petroleum fractions may also be used directly as the raw material for certain products; from the wet natural gas, we are able to isolate low carbon alkanes other than methane;The conversion or partial oxidation of coal gas, natural gas, refining plant gas, petroleum fraction or the vapor of crude oil fractions can enable the manufacturing of synthetic gas; through the calcium carbide obtained from coke or pyrolysis of natural gas and naphtha, we can prepare acetylene. Additionally, you can also get raw materials from agriculture and forestry by-products.

Organic Chemistry have wide range of applications which can be divided into three areas: First, the raw material for the production of polymer chemical products, namely monomer of polymerization reaction; the second is used for other kinds of organic chemical industry including raw materials of fine chemical products; Third, used for solvents, refrigerants, antifreeze, gas adsorbents. Basic organic chemical industry is the basis for the development of various organic chemical products production and is a main component in the modern industrial structure.

Click on the specific product, view the latest prices of the products, information, serving information
Structure Chemical Name CAS MF
(-)-Methyl (R)-3-hydroxypentanoate (-)-Methyl (R)-3-hydroxypentanoate 60793-22-8 C6H12O3
5-Chlorooxindole 5-Chlorooxindole 17630-75-0 C8H6ClNO
3-METHYL-2-(TRIBUTYLSTANNYL)PYRIDINE 3-METHYL-2-(TRIBUTYLSTANNYL)PYRIDINE 259807-97-1 C18H33NSn
Terrylene Terrylene 188-72-7 C30H16
1,3-DIAMINO-2,4,5,6-TETRAFLUOROBENZENE 1,3-DIAMINO-2,4,5,6-TETRAFLUOROBENZENE 1198-63-6 C6H4F4N2
FMOC-(2R,4S)-PRO(4-F)-OH FMOC-(2R,4S)-PRO(4-F)-OH 913820-87-8 C20H18FNO4
BENZENESULFONYL CYANIDE BENZENESULFONYL CYANIDE 24224-99-5 C7H5NO2S
Boron sub-2,3-naphthalocyanine chloride Boron sub-2,3-naphthalocyanine chloride 142710-56-3 C36H18BClN6
4 4-DIMETHOXY-2-METHYL-2-BUTANOL  97 4 4-DIMETHOXY-2-METHYL-2-BUTANOL 97 31525-67-4 C7H16O3
2-METHYL-4-NITROBENZONITRILE  98 2-METHYL-4-NITROBENZONITRILE 98 89001-53-6 C8H6N2O2
ZINC BROMIDE DIHYDRATE  99 ZINC BROMIDE DIHYDRATE 99 18921-13-6 Br2H4O2Zn
TRIETHYLENE GLYCOL MONOHEXYL ETHER TRIETHYLENE GLYCOL MONOHEXYL ETHER 25961-89-1 C12H26O4
T -BUTYL-P-NITROPHENYL CARBONATE T -BUTYL-P-NITROPHENYL CARBONATE 13303-10-1 C11H13NO5
(S)-(+)-2-AMINO-1-BUTANOL HYDROCHLORIDE (S)-(+)-2-AMINO-1-BUTANOL HYDROCHLORIDE 28895-09-2 C4H12ClNO
1,4-BIS(DICHLOROPHOSPHINO)BUTANE 1,4-BIS(DICHLOROPHOSPHINO)BUTANE 28240-71-3 C4H8Cl4P2
DIMETHYL-[2-(4-METHYL-[1,3,2]DIOXABORINAN--YLOXY)-ETHYL]-AMINE DIMETHYL-[2-(4-METHYL-[1,3,2]DIOXABORINAN--YLOXY)-ETHYL]-AMINE 7024-33-1 C8H18BNO3
2-Bromo-6-chlorotoluene 2-Bromo-6-chlorotoluene 62356-27-8 C7H6BrCl
1 3 5-TRIS(DIPHENYLAMINO)BENZENE  97 1 3 5-TRIS(DIPHENYLAMINO)BENZENE 97 126717-23-5 C42H33N3
(S)-3-(4-ETHYL-PHENYL)-2-(9H-FLUOREN-9-YLMETHOXYCARBONYLAMINO)-PROPIONIC ACID (S)-3-(4-ETHYL-PHENYL)-2-(9H-FLUOREN-9-YLMETHOXYCARBONYLAMINO)-PROPIONIC ACID 204384-72-5 C26H25NO4
3-(1-[(9H-FLUOREN-9-YLMETHOXY)CARBONYL]PYRROLIDIN-3-YL)PROPANOIC ACID 3-(1-[(9H-FLUOREN-9-YLMETHOXY)CARBONYL]PYRROLIDIN-3-YL)PROPANOIC ACID 1537722-39-6 C22H23NO4
(+)-Secoisolariciresinol (+)-Secoisolariciresinol 145265-02-7 C20H26O6
1,2-dimethyl-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-1H-imidazole 1,2-dimethyl-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-1H-imidazole 2223050-13-1 C11H19BN2O2
phenyl (R)-(5-(2-(2,5-difluorophenyl)pyrrolidin-1-yl)pyrazolo[1,5-a]pyrimidin-3-yl)carbamate phenyl (R)-(5-(2-(2,5-difluorophenyl)pyrrolidin-1-yl)pyrazolo[1,5-a]pyrimidin-3-yl)carbamate 2135871-21-3 C23H19F2N5O2
tert-Butyl 7-amino-1H-indole-1-carboxylate tert-Butyl 7-amino-1H-indole-1-carboxylate 1934432-59-3 C13H16N2O2
(S)-2-chloro-N-(2-hydroxy-1-phenylethyl)acetamide (S)-2-chloro-N-(2-hydroxy-1-phenylethyl)acetamide 291545-74-9 C10H12ClNO2
Fmoc-Val-Cys(Psi(Dmp,H)pro)-OH Fmoc-Val-Cys(Psi(Dmp,H)pro)-OH 1926163-08-7 C32H34N2O7S
1H-1,2,3-Triazol-1-amine, hydrochloride (1:1) 1H-1,2,3-Triazol-1-amine, hydrochloride (1:1) 332876-73-0 C2H5ClN4
Methyl 3-formyl-4-nitrobenzoate Methyl 3-formyl-4-nitrobenzoate 148625-35-8 C9H7NO5
2,3,4,6-TETRABROMOPHENOL 2,3,4,6-TETRABROMOPHENOL 14400-94-3 C6H2Br4O
2-BUTYL-2-ADAMANTANOL 2-BUTYL-2-ADAMANTANOL 14451-86-6 C14H24O
(2S,3S)-3-Hydroxypyrrolidine-2-carboxamide hydrochloride (2S,3S)-3-Hydroxypyrrolidine-2-carboxamide hydrochloride 426844-45-3 C5H11ClN2O2
tert-Butyl 3-oxopyrazolidine-1-carboxylate tert-Butyl 3-oxopyrazolidine-1-carboxylate 1075716-11-8 C8H14N2O3
tert-Butyl 3-amino-3-(4-fluorophenyl)azetidine-1-carboxylate tert-Butyl 3-amino-3-(4-fluorophenyl)azetidine-1-carboxylate 2156173-79-2 C14H19FN2O2
(5,6,7,8-Tetrahydroimidazo[1,2-a]pyridin-7-yl)methanamine dihydrochloride (5,6,7,8-Tetrahydroimidazo[1,2-a]pyridin-7-yl)methanamine dihydrochloride 1803583-23-4 C8H14ClN3
tert-Butyl 6-cyano-3,4-dihydro-1,5-naphthyridine-1(2H)-carboxylate tert-Butyl 6-cyano-3,4-dihydro-1,5-naphthyridine-1(2H)-carboxylate 2314394-09-5 C14H17N3O2
(2R,3R,4S,5S,6R)-2-(Acetoxymethyl)-6-aminotetrahydro-2H-pyran-3,4,5-triyl triacetate (2R,3R,4S,5S,6R)-2-(Acetoxymethyl)-6-aminotetrahydro-2H-pyran-3,4,5-triyl triacetate 41355-50-4 C14H21NO9
(2-Methyl-6-nitro-2,3-dihydroimidazo[2,1-b]thiazol-2-yl)methanol (2-Methyl-6-nitro-2,3-dihydroimidazo[2,1-b]thiazol-2-yl)methanol 2097082-03-4 C7H9N3O3S
7-Methoxy-5-(methylthio)-3H-[1,2,3]triazolo[4,5-d]pyrimidine 7-Methoxy-5-(methylthio)-3H-[1,2,3]triazolo[4,5-d]pyrimidine 1350563-51-7 C6H7N5OS
Imidazo[2,1-b]thiazol-5-ylmethanamine Imidazo[2,1-b]thiazol-5-ylmethanamine 933707-50-7 C6H7N3S
6,7-Dihydro-5H-cyclopenta[c]pyridine-3,7-diamine dihydrochloride 6,7-Dihydro-5H-cyclopenta[c]pyridine-3,7-diamine dihydrochloride 2096419-51-9 C8H12ClN3
tert-Butyl (5-chloro-2-methyl-3-nitrophenyl)carbamate tert-Butyl (5-chloro-2-methyl-3-nitrophenyl)carbamate 1392273-30-1 C12H15ClN2O4
6-(Tert-butylthio)-7-methoxyimidazo[1,2-a]pyridine 6-(Tert-butylthio)-7-methoxyimidazo[1,2-a]pyridine 2141967-02-2 C12H16N2OS
6-((Tetrahydro-2H-pyran-2-yl)oxy)-6,7-dihydro-5H-imidazo[2,1-b][1,3]oxazine 6-((Tetrahydro-2H-pyran-2-yl)oxy)-6,7-dihydro-5H-imidazo[2,1-b][1,3]oxazine 2135831-65-9 C11H16N2O3
Ethyl 2-(2-ethyl-1-oxo-6-(((trifluoromethyl)sulfonyl)oxy)-1,2,3,4-tetrahydronaphthalen-2-yl)acetate Ethyl 2-(2-ethyl-1-oxo-6-(((trifluoromethyl)sulfonyl)oxy)-1,2,3,4-tetrahydronaphthalen-2-yl)acetate 1414797-96-8 C17H19F3O6S
2-(6-Hydroxy-1-oxo-2-propyl-1,2,3,4-tetrahydronaphthalen-2-yl)acetic acid 2-(6-Hydroxy-1-oxo-2-propyl-1,2,3,4-tetrahydronaphthalen-2-yl)acetic acid 2221084-33-7 C15H18O4
2-(2-Ethyl-6-hydroxy-1-oxo-1,2,3,4-tetrahydronaphthalen-2-yl)acetic acid 2-(2-Ethyl-6-hydroxy-1-oxo-1,2,3,4-tetrahydronaphthalen-2-yl)acetic acid 1414797-94-6 C14H16O4
3-Nitro-4-phenylaminopyridine 3-Nitro-4-phenylaminopyridine
1,3,5-tris-[3,5-(dicarboxy)phenoxymethyl]benzene 1,3,5-tris-[3,5-(dicarboxy)phenoxymethyl]benzene 98036-00-1 C33H24O15
Methanolobus taylorii Oremland and Boone Methanolobus taylorii Oremland and Boone
4-Oxazolemethanol, 2-[4-(difluoromethoxy)-3-(1-methylethoxy)phenyl]- 4-Oxazolemethanol, 2-[4-(difluoromethoxy)-3-(1-methylethoxy)phenyl]- 1574285-36-1 C14H15F2NO4
N-([1,1'-biphenyl]-2-yl)-[1,1'-binaphthalen]-4-amine N-([1,1'-biphenyl]-2-yl)-[1,1'-binaphthalen]-4-amine
2-(3-Bromo-4-fluorophenyl)-4,6-diphenyl-1,3,5-triazine 2-(3-Bromo-4-fluorophenyl)-4,6-diphenyl-1,3,5-triazine 2229864-75-7 C21H13BrFN3
4-BROMO-2,3-DIFLUOROBENZONITRILE 4-BROMO-2,3-DIFLUOROBENZONITRILE 126163-58-4 C7H2BrF2N
9H-Carbazol-9-ol 9H-Carbazol-9-ol 54989-33-2 C12H9NO
2'-(Methylthio)-7',8'-dihydro-6'H-spiro[cyclohexane-1,9'-pyrazino[1',2':1,5]pyrrolo[2,3-d]pyrimidin]-6'-one 2'-(Methylthio)-7',8'-dihydro-6'H-spiro[cyclohexane-1,9'-pyrazino[1',2':1,5]pyrrolo[2,3-d]pyrimidin]-6'-one 2170747-00-7 C15H18N4OS
6,7-Dihydro-5H-imidazo[2,1-b][1,3]oxazin-6-ol 6,7-Dihydro-5H-imidazo[2,1-b][1,3]oxazin-6-ol 1557178-09-2 C6H8N2O2
BOC-3-AMINO-5-(FMOC-AMINO)-BENZOIC ACID BOC-3-AMINO-5-(FMOC-AMINO)-BENZOIC ACID 779335-06-7 C27H26N2O6
t-Boc Amine PEG Succinimidyl Carboxymethyl Ester t-Boc Amine PEG Succinimidyl Carboxymethyl Ester
6-METHOXYQUINOXALINE 6-METHOXYQUINOXALINE 6639-82-3 C9H8N2O
(3R,4S)-Rel-1-[(tert-butoxy)carbonyl]-4-(thiophen-3-yl)pyrrolidine-3-carboxylic acid (3R,4S)-Rel-1-[(tert-butoxy)carbonyl]-4-(thiophen-3-yl)pyrrolidine-3-carboxylic acid 1820575-20-9 C14H19NO4S
methyl (2R)-2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-3-[(triphenylmethyl)sulfanyl]propanoate methyl (2R)-2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-3-[(triphenylmethyl)sulfanyl]propanoate 245088-56-6 C38H33NO4S
methyl (2R)-2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-3-[(triphenylmethyl)sulfanyl]propanoate methyl (2R)-2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-3-[(triphenylmethyl)sulfanyl]propanoate 245088-56-6 C38H33NO4S
methyl (2R)-2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-3-[(triphenylmethyl)sulfanyl]propanoate methyl (2R)-2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-3-[(triphenylmethyl)sulfanyl]propanoate 245088-56-6 C38H33NO4S
[1,1':3',1'':3'',1'''-Quaterphenyl]-4,4'''-dicarboxylic acid, 4'',6'-diamino-5',5''-bis(4-carboxyphenyl)- [1,1':3',1'':3'',1'''-Quaterphenyl]-4,4'''-dicarboxylic acid, 4'',6'-diamino-5',5''-bis(4-carboxyphenyl)- 1834576-53-2 C40H28N2O8
2R-Eriodictyol-7-O-β-D-glucopyranoside 2R-Eriodictyol-7-O-β-D-glucopyranoside 1021946-00-8 C21H22O11
(7S,8R)-1-(4-hydroxy-3-methoxyphenyl)-2-[4-(3-hydroxypropyl)-2,6-di-methoxyphenoxy]-1,3-propanediol (7S,8R)-1-(4-hydroxy-3-methoxyphenyl)-2-[4-(3-hydroxypropyl)-2,6-di-methoxyphenoxy]-1,3-propanediol 80292-57-5 C21H28O8
N-Isopropylacrylamide N-Isopropylacrylamide 2210-25-5 C6H11NO
4-METHOXYBENZYLAMINE HYDROCHLORIDE 4-METHOXYBENZYLAMINE HYDROCHLORIDE 17061-61-9 C8H12ClNO
tert-Butyl (3-((4-methyl-2-nitrophenyl)amino)propyl)carbamate tert-Butyl (3-((4-methyl-2-nitrophenyl)amino)propyl)carbamate 1699971-24-8 C15H23N3O4
(R)-tert-Butyl 2-amino-3-cyclopropylpropanoate (R)-tert-Butyl 2-amino-3-cyclopropylpropanoate 1997360-23-2 C10H19NO2
(R)-tert-Butyl 2-amino-3-cyclopropylpropanoate (R)-tert-Butyl 2-amino-3-cyclopropylpropanoate 1997360-23-2 C10H19NO2
(R)-tert-Butyl 2-amino-3-cyclopropylpropanoate (R)-tert-Butyl 2-amino-3-cyclopropylpropanoate 1997360-23-2 C10H19NO2
N-Fmoc-(R)-3-methoxy-homophenylalanine N-Fmoc-(R)-3-methoxy-homophenylalanine 1260610-30-7 C26H25NO5
1187450-49-2 1187450-49-2 1187450-49-2 C17H26N2O5
1H-Imidazole, 1,1'-(oxydi-4,1-phenylene)bis- 1H-Imidazole, 1,1'-(oxydi-4,1-phenylene)bis- 13120-43-9 C18H14N4O
Cyclohexanecarboxylic acid, 4-(hydroxymethyl)-, 1,1-dimethyl ester, trans- Cyclohexanecarboxylic acid, 4-(hydroxymethyl)-, 1,1-dimethyl ester, trans- 1943744-53-3 C12H22O3
(3R)-7-fluoro-1,2,3,4-tetrahydroisoquinoline-3-carboxylic acid (3R)-7-fluoro-1,2,3,4-tetrahydroisoquinoline-3-carboxylic acid 444583-25-9 C10H10FNO2
METHYL 3-AMINO-3-(2-METHYLPHENYL)PROPANOATE HYDROCHLORIDE METHYL 3-AMINO-3-(2-METHYLPHENYL)PROPANOATE HYDROCHLORIDE 1258651-74-9 C11H16ClNO2
METHYL 3-AMINO-3-(2-METHYLPHENYL)PROPANOATE HYDROCHLORIDE METHYL 3-AMINO-3-(2-METHYLPHENYL)PROPANOATE HYDROCHLORIDE 1258651-74-9 C11H16ClNO2
METHYL 3-AMINO-3-(2-METHYLPHENYL)PROPANOATE HYDROCHLORIDE METHYL 3-AMINO-3-(2-METHYLPHENYL)PROPANOATE HYDROCHLORIDE 1258651-74-9 C11H16ClNO2
Fmoc-3,4-difluoro-D-homophenylalanine Fmoc-3,4-difluoro-D-homophenylalanine 1260609-50-4 C25H21F2NO4
Fmoc-3,4-difluoro-D-homophenylalanine Fmoc-3,4-difluoro-D-homophenylalanine 1260609-50-4 C25H21F2NO4
N-Fmoc-N,O-dimethyl-D-serine N-Fmoc-N,O-dimethyl-D-serine 2243125-71-3 C20H21NO5
4-Isoquinolinecarboxylic acid, 2,3,5,6,7,8-
hexahydro-3,8-dioxo- 4-Isoquinolinecarboxylic acid, 2,3,5,6,7,8- hexahydro-3,8-dioxo- 2049011-15-4 C10H9NO4
Glycine, N-[(9H-fluoren-9-ylmethoxy)carbonyl]-N-(2-phenoxyethyl)- Glycine, N-[(9H-fluoren-9-ylmethoxy)carbonyl]-N-(2-phenoxyethyl)- 2255321-25-4 C25H23NO5
1,21-Heneicosanediol 1,21-Heneicosanediol 95008-70-1 C21H44O2
2-[9H-fluoren-9-ylmethoxycarbonyl(pyridin-3-ylmethyl)amino]acetic acid 2-[9H-fluoren-9-ylmethoxycarbonyl(pyridin-3-ylmethyl)amino]acetic acid 258332-47-7 C23H20N2O4
1H-Imidazole, 1,1'-(2,5-dimethyl-1,4-phenylene)bis- 1H-Imidazole, 1,1'-(2,5-dimethyl-1,4-phenylene)bis- 1347702-73-1 C14H14N4
1,1,4-Butanetricarboxylic acid, 4-[[(9H-fluoren-9-ylmethoxy)carbonyl]amino]-, 1,1-bis(1,1-dimethylethyl) ester, (4S)- 1,1,4-Butanetricarboxylic acid, 4-[[(9H-fluoren-9-ylmethoxy)carbonyl]amino]-, 1,1-bis(1,1-dimethylethyl) ester, (4S)- 912354-06-4 C30H37NO8
Butane gas Butane gas C4H10
sodium (2S)-2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-3-(4-{[(prop-2-en-1-yloxy)carbonyl]amino}phenyl)propanoate sodium (2S)-2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-3-(4-{[(prop-2-en-1-yloxy)carbonyl]amino}phenyl)propanoate C28H25N2NaO6
sodium (2S)-2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-3-(4-{[(prop-2-en-1-yloxy)carbonyl]amino}phenyl)propanoate sodium (2S)-2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-3-(4-{[(prop-2-en-1-yloxy)carbonyl]amino}phenyl)propanoate C28H25N2NaO6
sodium (2S)-2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-3-(4-{[(prop-2-en-1-yloxy)carbonyl]amino}phenyl)propanoate sodium (2S)-2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-3-(4-{[(prop-2-en-1-yloxy)carbonyl]amino}phenyl)propanoate C28H25N2NaO6
4,6- diisopropylpyrimidin-5-amine 4,6- diisopropylpyrimidin-5-amine 2168417-89-6 C10H17N3
(2S,3R)-3-(tert-butoxy)-2-[(2S)-2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-4-[(triphenylmethyl)carbamoyl]butanamido]butanoic acid (2S,3R)-3-(tert-butoxy)-2-[(2S)-2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-4-[(triphenylmethyl)carbamoyl]butanamido]butanoic acid C47H49N3O7
(3R)-3-(9H-fluoren-9-ylmethoxycarbonylamino)-3-pyridin-4-ylpropanoic acid (3R)-3-(9H-fluoren-9-ylmethoxycarbonylamino)-3-pyridin-4-ylpropanoic acid 511272-44-9 C23H20N2O4
4,4'-Bi-1H-pyrazole 4,4'-Bi-1H-pyrazole 25240-33-9 C6H6N4
3-Morpholineacetic acid, 4-[(9H-fluoren-9-ylmethoxy)carbonyl]-, (3S)- 3-Morpholineacetic acid, 4-[(9H-fluoren-9-ylmethoxy)carbonyl]-, (3S)- 2322623-47-0 C21H21NO5
(2R)-2-(9H-fluoren-9-ylmethoxycarbonylamino)-4-[4-(trifluoromethoxy)phenyl]butanoic acid (2R)-2-(9H-fluoren-9-ylmethoxycarbonylamino)-4-[4-(trifluoromethoxy)phenyl]butanoic acid 1260614-07-0 C26H22F3NO5
17β-Estradiolum ELISA KIT 17β-Estradiolum ELISA KIT
HomePage | Member Companies | Advertising | Contact us | Previous WebSite | MSDS | CAS Index | CAS DataBase
Copyright © 2016 ChemicalBook All rights reserved.