CAS号是公开的化学物质信息的最权威的集合。CAS号涵盖从1957年至今的科学文献中确定的物质，其他物质可追溯到20世纪初。它也称CAS编号(CAS Registry Number，或称CAS
Number，CAS Rn，CAS #)，又称CAS登录号或CAS登记号码，是某种物质(化合物、高分子材料、生物序列(Biological
sequences)、混合物或合金)的唯一的数字识别号码。美国化学会的下设组织化学文摘社(Chemical Abstracts
Service，简称CAS)负责为每一种出现在文献中的物质分配一个CAS编号，其目的是为了避免化学物质有多种名称的麻烦，使数据库的检索更为方便。如今几乎所有的化学数据库都允许用CAS编号检索。
| 名称 |
英文名 |
物理化学性质 |
CAS号 |
分子式 |
| Ethyl 2,6-dimethylmorpholine-3-carboxylate
|
Ethyl 2,6-dimethylmorpholine-3-carboxylate
|
分子量：187.24
密度：N/A
沸点：N/A
熔点：N/A
|
2248258-79-7
|
C9H17NO3
|
| 7-Chloroquinolin-8-ol hydrobromide
|
7-Chloroquinolin-8-ol hydrobromide
|
分子量：260.51
密度：N/A
沸点：N/A
熔点：N/A
|
2287301-25-9
|
C9H7BrClNO
|
| Tert-butyl 2-anilino-2-methylpropanoate
|
Tert-butyl 2-anilino-2-methylpropanoate
|
分子量：235.32
密度：N/A
沸点：N/A
熔点：N/A
|
2248336-64-1
|
C14H21NO2
|
| 7-Amino-4H-pyrido[3,2-b][1,4]oxazin-3-one;hydrochloride
|
7-Amino-4H-pyrido[3,2-b][1,4]oxazin-3-one;hydrochloride
|
分子量：201.61
密度：N/A
沸点：N/A
熔点：N/A
|
2260931-80-2
|
C7H8ClN3O2
|
| 2-(4-methoxyphenyl)-1-[3-(1-methyl-1H-pyrazol-4-yl)piperidin-1-yl]ethan-1-one
|
2-(4-methoxyphenyl)-1-[3-(1-methyl-1H-pyrazol-4-yl)piperidin-1-yl]ethan-1-one
|
分子量：313.4
密度：N/A
沸点：N/A
熔点：N/A
|
2310147-06-7
|
C18H23N3O2
|
| 1-Acetyl-N-[6-(methylsulfonyl)-2-benzothiazolyl]-3-piperidinecarboxamide
|
1-Acetyl-N-[6-(methylsulfonyl)-2-benzothiazolyl]-3-piperidinecarboxamide
|
分子量：381.5
密度：N/A
沸点：N/A
熔点：N/A
|
1158750-71-0
|
C16H19N3O4S2
|
| 1-(2-phenylethenesulfonyl)-2,3-dihydro-1H-indole-2-carboxylic acid
|
1-(2-phenylethenesulfonyl)-2,3-dihydro-1H-indole-2-carboxylic acid
|
分子量：329.4
密度：N/A
沸点：N/A
熔点：N/A
|
2220212-90-6
|
C17H15NO4S
|
| 2-{[(Tert-butoxy)carbonyl]amino}-5-(propan-2-yloxy)pentanoic acid
|
2-{[(Tert-butoxy)carbonyl]amino}-5-(propan-2-yloxy)pentanoic acid
|
分子量：275.34
密度：N/A
沸点：N/A
熔点：N/A
|
2171734-49-7
|
C13H25NO5
|
| 5-Bromo-1-[(tert-butoxy)carbonyl]-1,2,3,4-tetrahydropyridine-2-carboxylic acid
|
5-Bromo-1-[(tert-butoxy)carbonyl]-1,2,3,4-tetrahydropyridine-2-carboxylic acid
|
分子量：306.15
密度：N/A
沸点：N/A
熔点：N/A
|
2169408-36-8
|
C11H16BrNO4
|
| 4-(1H-Imidazol-5-yl)-3,5-dimethyl-1,2-oxazole
|
4-(1H-Imidazol-5-yl)-3,5-dimethyl-1,2-oxazole
|
分子量：163.18
密度：N/A
沸点：N/A
熔点：N/A
|
2224269-57-0
|
C8H9N3O
|
| Rel-(5S,7R)-2-bromo-5-phenyl-6,7-dihydro-5H-pyrrolo[1,2-b][1,2,4]triazol-7-ol
|
Rel-(5S,7R)-2-bromo-5-phenyl-6,7-dihydro-5H-pyrrolo[1,2-b][1,2,4]triazol-7-ol
|
分子量：280.12
密度：N/A
沸点：N/A
熔点：N/A
|
2268741-27-9
|
C11H10BrN3O
|
| Quinolin-3-ylmethanesulfonylchloride
|
Quinolin-3-ylmethanesulfonylchloride
|
分子量：241.69
密度：N/A
沸点：N/A
熔点：N/A
|
1697144-88-9
|
C10H8ClNO2S
|
| Methyl3-methyl-3-(thietan-3-ylamino)butanoate
|
Methyl3-methyl-3-(thietan-3-ylamino)butanoate
|
分子量：203.30
密度：N/A
沸点：N/A
熔点：N/A
|
1864794-91-1
|
C9H17NO2S
|
| 2-Chloro-4-ethoxy-3-fluorobenzaldehyde
|
2-Chloro-4-ethoxy-3-fluorobenzaldehyde
|
分子量：202.61
密度：N/A
沸点：N/A
熔点：N/A
|
1936390-86-1
|
C9H8ClFO2
|
| Spiro[2.3]hexane-5-sulfonyl chloride
|
Spiro[2.3]hexane-5-sulfonyl chloride
|
分子量：180.65
密度：N/A
沸点：N/A
熔点：N/A
|
2225154-30-1
|
C6H9ClO2S
|
| 2,4-Dibromo-6-nitropyridine
|
2,4-Dibromo-6-nitropyridine
|
分子量：281.89
密度：N/A
沸点：N/A
熔点：N/A
|
1803817-49-3
|
C5H2Br2N2O2
|
| 1-Fluoro-2,3-dimethoxy-4-methylbenzene
|
1-Fluoro-2,3-dimethoxy-4-methylbenzene
|
分子量：170.18
密度：N/A
沸点：N/A
熔点：N/A
|
1803769-46-1
|
C9H11FO2
|
| 2-{[1-(2-{[1,1'-biphenyl]-4-yl}acetyl)piperidin-4-yl]methyl}-2H,3H,5H,6H,7H-cyclopenta[c]pyridazin-3-one
|
2-{[1-(2-{[1,1'-biphenyl]-4-yl}acetyl)piperidin-4-yl]methyl}-2H,3H,5H,6H,7H-cyclopenta[c]pyridazin-3-one
|
分子量：427.5
密度：N/A
沸点：N/A
熔点：N/A
|
2320858-01-1
|
C27H29N3O2
|
| 1-(2-Bromo-5-methoxyphenyl)-1-chloropropan-2-one
|
1-(2-Bromo-5-methoxyphenyl)-1-chloropropan-2-one
|
分子量：277.54
密度：N/A
沸点：N/A
熔点：N/A
|
1803847-35-9
|
C10H10BrClO2
|
| 2-Fluoro-6-methyl-3-(trifluoromethoxy)aniline
|
2-Fluoro-6-methyl-3-(trifluoromethoxy)aniline
|
分子量：209.14
密度：N/A
沸点：N/A
熔点：N/A
|
1803880-62-7
|
C8H7F4NO
|
| CID 137916872
|
CID 137916872
|
分子量：147.12
密度：N/A
沸点：N/A
熔点：N/A
|
2379945-32-9
|
C6H7F2NO
|
| Ethyl 5,5-dimethoxypiperidine-3-carboxylate
|
Ethyl 5,5-dimethoxypiperidine-3-carboxylate
|
分子量：217.26
密度：N/A
沸点：N/A
熔点：N/A
|
2248335-43-3
|
C10H19NO4
|
| (2-Methylidenecyclopropyl)methanamine;hydrochloride
|
(2-Methylidenecyclopropyl)methanamine;hydrochloride
|
分子量：119.59
密度：N/A
沸点：N/A
熔点：N/A
|
2253630-74-7
|
C5H10ClN
|
| 3-{[1-({4H,5H,6H-cyclopenta[d][1,3]thiazol-2-yl}methyl)piperidin-4-yl]methoxy}-6-cyclopropylpyridazine
|
3-{[1-({4H,5H,6H-cyclopenta[d][1,3]thiazol-2-yl}methyl)piperidin-4-yl]methoxy}-6-cyclopropylpyridazine
|
分子量：370.5
密度：N/A
沸点：N/A
熔点：N/A
|
2380068-64-2
|
C20H26N4OS
|
| 3-(2,5-Dihydroxyphenyl)propanenitrile
|
3-(2,5-Dihydroxyphenyl)propanenitrile
|
分子量：163.17
密度：N/A
沸点：N/A
熔点：N/A
|
1807049-83-7
|
C9H9NO2
|
| (R)-6-Bromo-5-chloro-1,2,3,4-tetrahydronaphthalen-1-amine
|
(R)-6-Bromo-5-chloro-1,2,3,4-tetrahydronaphthalen-1-amine
|
分子量：260.56
密度：N/A
沸点：N/A
熔点：N/A
|
1336229-66-3
|
C10H11BrClN
|
| N-Hydroxy-(6-methylpyridine)-2-carbonimidoyl chloride
|
N-Hydroxy-(6-methylpyridine)-2-carbonimidoyl chloride
|
分子量：170.59
密度：N/A
沸点：N/A
熔点：N/A
|
1265323-74-7
|
C7H7ClN2O
|
| (2E)-5-(2,5-dichlorobenzyl)-2-{(2E)-[1-(4-methylphenyl)ethylidene]hydrazinylidene}-1,3-thiazolidin-4-one
|
(2E)-5-(2,5-dichlorobenzyl)-2-{(2E)-[1-(4-methylphenyl)ethylidene]hydrazinylidene}-1,3-thiazolidin-4-one
|
分子量：406.3
密度：N/A
沸点：N/A
熔点：N/A
|
301175-32-6
|
C19H17Cl2N3OS
|
| 1-(2-Amino-3-mercaptophenyl)-1-bromopropan-2-one
|
1-(2-Amino-3-mercaptophenyl)-1-bromopropan-2-one
|
分子量：260.15
密度：N/A
沸点：N/A
熔点：N/A
|
1807105-36-7
|
C9H10BrNOS
|
| 3-Bromo-4-chloro-5-methoxybenzoylchloride
|
3-Bromo-4-chloro-5-methoxybenzoylchloride
|
分子量：283.93
密度：N/A
沸点：N/A
熔点：N/A
|
2167240-72-2
|
C8H5BrCl2O2
|
| 4-Methoxypyridine-2,6-bis(carboximidamide)
|
4-Methoxypyridine-2,6-bis(carboximidamide)
|
分子量：193.21
密度：N/A
沸点：N/A
熔点：N/A
|
1665340-57-7
|
C8H11N5O
|
| N-ethyl-5-methylpyridine-3-sulfonamide
|
N-ethyl-5-methylpyridine-3-sulfonamide
|
分子量：200.26
密度：N/A
沸点：N/A
熔点：N/A
|
1856141-60-0
|
C8H12N2O2S
|
| 3,5-Difluoro-4-(difluoromethyl)benzaldehyde
|
3,5-Difluoro-4-(difluoromethyl)benzaldehyde
|
分子量：192.11
密度：N/A
沸点：N/A
熔点：N/A
|
1443524-50-2
|
C8H4F4O
|
| 2-(2-Bromo-5-fluorophenyl)butanoic acid
|
2-(2-Bromo-5-fluorophenyl)butanoic acid
|
分子量：261.09
密度：N/A
沸点：N/A
熔点：N/A
|
1824009-21-3
|
C10H10BrFO2
|
| 1-Benzyl-3-(2,4-dimethylphenyl)pyrrolidin-3-amine
|
1-Benzyl-3-(2,4-dimethylphenyl)pyrrolidin-3-amine
|
分子量：280.4
密度：N/A
沸点：N/A
熔点：N/A
|
1824016-27-4
|
C19H24N2
|
| Ethyl 5-bromo-3-cyano-2-methoxybenzoate
|
Ethyl 5-bromo-3-cyano-2-methoxybenzoate
|
分子量：284.11
密度：N/A
沸点：N/A
熔点：N/A
|
1807208-96-3
|
C11H10BrNO3
|
| 4-(Diphenylamino)-N-hydroxy-6-(pyrrolidin-1-yl)-1,3,5-triazine-2-carboximidamide
|
4-(Diphenylamino)-N-hydroxy-6-(pyrrolidin-1-yl)-1,3,5-triazine-2-carboximidamide
|
分子量：375.4
密度：N/A
沸点：N/A
熔点：N/A
|
1164538-72-0
|
C20H21N7O
|
| N-(4-amino-2-((2-((2,3-dimethylphenyl)amino)-2-oxoethyl)thio)-6-oxo-1,6-dihydropyrimidin-5-yl)furan-2-carboxamide
|
N-(4-amino-2-((2-((2,3-dimethylphenyl)amino)-2-oxoethyl)thio)-6-oxo-1,6-dihydropyrimidin-5-yl)furan-2-carboxamide
|
分子量：413.5
密度：N/A
沸点：N/A
熔点：N/A
|
868226-00-0
|
C19H19N5O4S
|
| (4-Hydroxypyrimidin-2-yl)(imino)methyl-lambda6-sulfanone
|
(4-Hydroxypyrimidin-2-yl)(imino)methyl-lambda6-sulfanone
|
分子量：173.20
密度：N/A
沸点：N/A
熔点：N/A
|
2059988-82-6
|
C5H7N3O2S
|
| 3-Bromo-4-chloro-2-fluorobenzamide
|
3-Bromo-4-chloro-2-fluorobenzamide
|
分子量：252.47
密度：N/A
沸点：N/A
熔点：N/A
|
2090870-27-0
|
C7H4BrClFNO
|
| Methyl 3-(4-methoxyphenyl)pyrrolidine-3-carboxylate
|
Methyl 3-(4-methoxyphenyl)pyrrolidine-3-carboxylate
|
分子量：235.28
密度：N/A
沸点：N/A
熔点：N/A
|
2114695-73-5
|
C13H17NO3
|
| (1S,3R)-3-Cyclopropyl-2,2-difluorocyclopropane-1-carboxylic acid
|
(1S,3R)-3-Cyclopropyl-2,2-difluorocyclopropane-1-carboxylic acid
|
分子量：162.13
密度：N/A
沸点：N/A
熔点：N/A
|
2309431-51-2
|
C7H8F2O2
|
| 2-[(1S)-1-aminoethyl]-6-bromo-4-chlorophenol
|
2-[(1S)-1-aminoethyl]-6-bromo-4-chlorophenol
|
分子量：250.52
密度：N/A
沸点：N/A
熔点：N/A
|
1241683-56-6
|
C8H9BrClNO
|
| (S)-2-(5-Fluoro-2-iodophenyl)pyrrolidine
|
(S)-2-(5-Fluoro-2-iodophenyl)pyrrolidine
|
分子量：291.10
密度：N/A
沸点：N/A
熔点：N/A
|
1213147-21-7
|
C10H11FIN
|
| Benzo[b]thiophen-7-amine, 3,5-dibromo-
|
Benzo[b]thiophen-7-amine, 3,5-dibromo-
|
分子量：307.01
密度：N/A
沸点：N/A
熔点：N/A
|
1934563-00-4
|
C8H5Br2NS
|
| 3-[(3,5-Dimethylphenyl)amino]-1,2,4-triazin-5-ol
|
3-[(3,5-Dimethylphenyl)amino]-1,2,4-triazin-5-ol
|
分子量：216.24
密度：N/A
沸点：N/A
熔点：N/A
|
535981-68-1
|
C11H12N4O
|
| Cyclopentanecarboxylic acid, 2-formyl-5-hydroxy-, methyl ester, (1I+/-,2I(2),5I(2))-
|
Cyclopentanecarboxylic acid, 2-formyl-5-hydroxy-, methyl ester, (1I+/-,2I(2),5I(2))-
|
分子量：172.18
密度：N/A
沸点：N/A
熔点：N/A
|
79389-43-8
|
C8H12O4
|
| (Z)-3-(4-ethoxy-3-methoxyphenyl)-N'-(2-hydroxybenzylidene)-1H-pyrazole-5-carbohydrazide
|
(Z)-3-(4-ethoxy-3-methoxyphenyl)-N'-(2-hydroxybenzylidene)-1H-pyrazole-5-carbohydrazide
|
分子量：380.4
密度：N/A
沸点：N/A
熔点：N/A
|
1310343-80-6
|
C20H20N4O4
|
| 4-(azetidin-3-yl)-1-methyl-1H-imidazole
|
4-(azetidin-3-yl)-1-methyl-1H-imidazole
|
分子量：137.18
密度：N/A
沸点：N/A
熔点：N/A
|
1861943-22-7
|
C7H11N3
|
| 3-Pyridinecarboxamide, 5-amino-4-(difluoromethyl)-2-fluoro-
|
3-Pyridinecarboxamide, 5-amino-4-(difluoromethyl)-2-fluoro-
|
分子量：205.14
密度：N/A
沸点：N/A
熔点：N/A
|
1805210-38-1
|
C7H6F3N3O
|