CAS号查询库

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
1-(4-tert-butylphenyl)-1H-pyrazole-5-sulfonyl chloride	1-(4-tert-butylphenyl)-1H-pyrazole-5-sulfonyl chloride	分子量：298.79 密度：N/A 沸点：N/A 熔点：N/A	2172577-46-5	C₁₃H₁₅ClN₂O₂S
2-(Difluoromethyl)-1,2-dimethylcyclopentan-1-ol	2-(Difluoromethyl)-1,2-dimethylcyclopentan-1-ol	分子量：164.19 密度：N/A 沸点：N/A 熔点：N/A	2171960-18-0	C₈H₁₄F₂O
1-[2-(4-Bromo-3-fluorophenyl)propan-2-yl]cyclopropan-1-amine	1-[2-(4-Bromo-3-fluorophenyl)propan-2-yl]cyclopropan-1-amine	分子量：272.16 密度：N/A 沸点：N/A 熔点：N/A	2229286-80-8	C₁₂H₁₅BrFN
tert-Butyl 1-(methoxymethyl)-3,8-diazabicyclo[3.2.1]octane-8-carboxylate	tert-Butyl 1-(methoxymethyl)-3,8-diazabicyclo[3.2.1]octane-8-carboxylate	分子量：256.34 密度：N/A 沸点：N/A 熔点：N/A	2852765-98-9	C₁₃H₂₄N₂O₃
4-chloro-2-(4,5-diiodo-1H-imidazol-1-yl)benzaldehyde	4-chloro-2-(4,5-diiodo-1H-imidazol-1-yl)benzaldehyde	分子量：458.42 密度：N/A 沸点：N/A 熔点：N/A	1881993-26-5	C₁₀H₅ClI₂N₂O
1-methyl-3-(3-methyl-1H-pyrazol-1-yl)-1H-pyrazole-4-carbaldehyde	1-methyl-3-(3-methyl-1H-pyrazol-1-yl)-1H-pyrazole-4-carbaldehyde	分子量：190.20 密度：N/A 沸点：N/A 熔点：N/A	2143024-13-7	C₉H₁₀N₄O
3-(2,4-dimethyl-1H-imidazol-1-yl)-5-fluoropyridine-4-carbaldehyde	3-(2,4-dimethyl-1H-imidazol-1-yl)-5-fluoropyridine-4-carbaldehyde	分子量：219.21 密度：N/A 沸点：N/A 熔点：N/A	2172223-79-7	C₁₁H₁₀FN₃O
4-formyl-1-(oxolan-3-yl)-1H-pyrazole-3-carboxylic acid	4-formyl-1-(oxolan-3-yl)-1H-pyrazole-3-carboxylic acid	分子量：210.19 密度：N/A 沸点：N/A 熔点：N/A	2169200-55-7	C₉H₁₀N₂O₄
4-[5-chloro-3-(methoxymethyl)-1H-pyrazol-1-yl]phenol	4-[5-chloro-3-(methoxymethyl)-1H-pyrazol-1-yl]phenol	分子量：238.67 密度：N/A 沸点：N/A 熔点：N/A	2167427-00-9	C₁₁H₁₁ClN₂O₂
4-{1H-pyrazolo[4,3-b]pyridin-1-yl}phenol	4-{1H-pyrazolo[4,3-b]pyridin-1-yl}phenol	分子量：211.22 密度：N/A 沸点：N/A 熔点：N/A	2168395-94-4	C₁₂H₉N₃O
2-amino-4-(2-methylcyclopropyl)-1H-pyrrole-3-carbonitrile	2-amino-4-(2-methylcyclopropyl)-1H-pyrrole-3-carbonitrile	分子量：161.20 密度：N/A 沸点：N/A 熔点：N/A	2169073-87-2	C₉H₁₁N₃
5-(1-Methylcyclobutyl)oxolan-2-one	5-(1-Methylcyclobutyl)oxolan-2-one	分子量：154.21 密度：N/A 沸点：N/A 熔点：N/A	2141349-09-7	C₉H₁₄O₂
3-(Chlorosulfonyl)-6-methoxy-2-methylbenzoic acid	3-(Chlorosulfonyl)-6-methoxy-2-methylbenzoic acid	分子量：264.68 密度：N/A 沸点：N/A 熔点：N/A	2166721-77-1	C₉H₉ClO₅S
4-(bromomethyl)-1-methyl-3-(3-methylbutyl)-1H-pyrazole	4-(bromomethyl)-1-methyl-3-(3-methylbutyl)-1H-pyrazole	分子量：245.16 密度：N/A 沸点：N/A 熔点：N/A	2168762-60-3	C₁₀H₁₇BrN₂
6-{[2-(Prop-2-yn-1-ylsulfanyl)ethyl]amino}pyrimidine-4-carboxylic acid	6-{[2-(Prop-2-yn-1-ylsulfanyl)ethyl]amino}pyrimidine-4-carboxylic acid	分子量：237.28 密度：N/A 沸点：N/A 熔点：N/A	1852756-35-4	C₁₀H₁₁N₃O₂S
5-[(Prop-2-en-1-yl)(prop-2-yn-1-yl)amino]pyridine-2-carboxylic acid	5-[(Prop-2-en-1-yl)(prop-2-yn-1-yl)amino]pyridine-2-carboxylic acid	分子量：216.24 密度：N/A 沸点：N/A 熔点：N/A	1876116-57-2	C₁₂H₁₂N₂O₂
3-[(2-Hydroxypent-4-yn-1-yl)amino]pyridine-4-carboxylic acid	3-[(2-Hydroxypent-4-yn-1-yl)amino]pyridine-4-carboxylic acid	分子量：220.22 密度：N/A 沸点：N/A 熔点：N/A	2162702-84-1	C₁₁H₁₂N₂O₃
Methyl 2-(1-bromobutyl)-1,3-thiazole-5-carboxylate	Methyl 2-(1-bromobutyl)-1,3-thiazole-5-carboxylate	分子量：278.17 密度：N/A 沸点：N/A 熔点：N/A	2169195-13-3	C₉H₁₂BrNO₂S
Methyl 2-(1-bromoethyl)-4-methyl-1,3-thiazole-5-carboxylate	Methyl 2-(1-bromoethyl)-4-methyl-1,3-thiazole-5-carboxylate	分子量：264.14 密度：N/A 沸点：N/A 熔点：N/A	2168000-93-7	C₈H₁₀BrNO₂S
Methyl 2-(1-bromo-2-cyanoethyl)-4-methyl-1,3-thiazole-5-carboxylate	Methyl 2-(1-bromo-2-cyanoethyl)-4-methyl-1,3-thiazole-5-carboxylate	分子量：289.15 密度：N/A 沸点：N/A 熔点：N/A	2167364-08-9	C₉H₉BrN₂O₂S
Methyl 2-(1-bromo-2-fluoro-2-methylpropyl)-1,3-thiazole-4-carboxylate	Methyl 2-(1-bromo-2-fluoro-2-methylpropyl)-1,3-thiazole-4-carboxylate	分子量：296.16 密度：N/A 沸点：N/A 熔点：N/A	2167485-69-8	C₉H₁₁BrFNO₂S
2-(1-Bromo-2-methoxypropyl)-4,5-dimethyl-1,3-thiazole	2-(1-Bromo-2-methoxypropyl)-4,5-dimethyl-1,3-thiazole	分子量：264.18 密度：N/A 沸点：N/A 熔点：N/A	2166790-79-8	C₉H₁₄BrNOS
1-(But-3-en-2-yl)-3-[3-(dimethylamino)propyl]thiourea	1-(But-3-en-2-yl)-3-[3-(dimethylamino)propyl]thiourea	分子量：215.36 密度：N/A 沸点：N/A 熔点：N/A	2166832-90-0	C₁₀H₂₁N₃S
1-(But-3-en-2-yl)-3-[2-(dimethylamino)ethyl]thiourea	1-(But-3-en-2-yl)-3-[2-(dimethylamino)ethyl]thiourea	分子量：201.33 密度：N/A 沸点：N/A 熔点：N/A	1862877-95-9	C₉H₁₉N₃S
Tert-butyl 3-(1,3-thiazol-4-yl)prop-2-ynoate	Tert-butyl 3-(1,3-thiazol-4-yl)prop-2-ynoate	分子量：209.27 密度：N/A 沸点：N/A 熔点：N/A	2138019-28-8	C₁₀H₁₁NO₂S
3-(But-3-en-2-yl)-1-[(4-chlorophenyl)methyl]thiourea	3-(But-3-en-2-yl)-1-[(4-chlorophenyl)methyl]thiourea	分子量：254.78 密度：N/A 沸点：N/A 熔点：N/A	2169627-38-5	C₁₂H₁₅ClN₂S
3-(But-3-en-2-yl)-1-[(3-fluorophenyl)methyl]thiourea	3-(But-3-en-2-yl)-1-[(3-fluorophenyl)methyl]thiourea	分子量：238.33 密度：N/A 沸点：N/A 熔点：N/A	2167016-80-8	C₁₂H₁₅FN₂S
3-(But-3-en-2-yl)-1-(3-iodophenyl)thiourea	3-(But-3-en-2-yl)-1-(3-iodophenyl)thiourea	分子量：332.21 密度：N/A 沸点：N/A 熔点：N/A	2168821-86-9	C₁₁H₁₃IN₂S
methyl 4-(4-aminopyridin-3-yl)-5-hydroxy-1-methyl-1H-pyrazole-3-carboxylate	methyl 4-(4-aminopyridin-3-yl)-5-hydroxy-1-methyl-1H-pyrazole-3-carboxylate	分子量：248.24 密度：N/A 沸点：N/A 熔点：N/A	2137994-84-2	C₁₁H₁₂N₄O₃
methyl 4-[3-(bromomethyl)phenyl]-5-hydroxy-1-methyl-1H-pyrazole-3-carboxylate	methyl 4-[3-(bromomethyl)phenyl]-5-hydroxy-1-methyl-1H-pyrazole-3-carboxylate	分子量：325.16 密度：N/A 沸点：N/A 熔点：N/A	2138267-47-5	C₁₃H₁₃BrN₂O₃
methyl 5-hydroxy-1-methyl-4-(1-methyl-1H-pyrazol-4-yl)-1H-pyrazole-3-carboxylate	methyl 5-hydroxy-1-methyl-4-(1-methyl-1H-pyrazol-4-yl)-1H-pyrazole-3-carboxylate	分子量：236.23 密度：N/A 沸点：N/A 熔点：N/A	2137994-92-2	C₁₀H₁₂N₄O₃
methyl 4-[4-(1-aminoethyl)phenyl]-5-hydroxy-1-methyl-1H-pyrazole-3-carboxylate	methyl 4-[4-(1-aminoethyl)phenyl]-5-hydroxy-1-methyl-1H-pyrazole-3-carboxylate	分子量：275.30 密度：N/A 沸点：N/A 熔点：N/A	2138519-47-6	C₁₄H₁₇N₃O₃
1-{5-[(Butylamino)methyl]furan-2-yl}piperidine-4-carboxylic acid	1-{5-[(Butylamino)methyl]furan-2-yl}piperidine-4-carboxylic acid	分子量：280.36 密度：N/A 沸点：N/A 熔点：N/A	2138519-59-0	C₁₅H₂₄N₂O₃
ethyl 2-[4-(3,4-dimethoxyphenyl)-1H-1,2,3-triazol-1-yl]acetate	ethyl 2-[4-(3,4-dimethoxyphenyl)-1H-1,2,3-triazol-1-yl]acetate	分子量：291.30 密度：N/A 沸点：N/A 熔点：N/A	2138519-91-0	C₁₄H₁₇N₃O₄
4-[4-(3,4-dimethoxyphenyl)-1H-1,2,3-triazol-1-yl]piperidine	4-[4-(3,4-dimethoxyphenyl)-1H-1,2,3-triazol-1-yl]piperidine	分子量：288.34 密度：N/A 沸点：N/A 熔点：N/A	2138250-36-7	C₁₅H₂₀N₄O₂
ethyl 3-[4-(3,4-dimethoxyphenyl)-1H-1,2,3-triazol-1-yl]-2-hydroxypropanoate	ethyl 3-[4-(3,4-dimethoxyphenyl)-1H-1,2,3-triazol-1-yl]-2-hydroxypropanoate	分子量：321.33 密度：N/A 沸点：N/A 熔点：N/A	2138250-37-8	C₁₅H₁₉N₃O₅
Tert-butyl 4-[4-(2-methylpropyl)piperazin-1-yl]azepane-1-carboxylate	Tert-butyl 4-[4-(2-methylpropyl)piperazin-1-yl]azepane-1-carboxylate	分子量：339.5 密度：N/A 沸点：N/A 熔点：N/A	2137789-04-7	C₁₉H₃₇N₃O₂
Tert-butyl 4-[4-(2-methoxyethyl)piperazin-1-yl]azepane-1-carboxylate	Tert-butyl 4-[4-(2-methoxyethyl)piperazin-1-yl]azepane-1-carboxylate	分子量：341.5 密度：N/A 沸点：N/A 熔点：N/A	2137996-31-5	C₁₈H₃₅N₃O₃
ethyl 2-[(4Z)-8-chloro-6-methyl-3,4-dihydro-2H-1-benzopyran-4-ylidene]acetate	ethyl 2-[(4Z)-8-chloro-6-methyl-3,4-dihydro-2H-1-benzopyran-4-ylidene]acetate	分子量：266.72 密度：N/A 沸点：N/A 熔点：N/A	2172632-08-3	C₁₄H₁₅ClO₃
4-(4-amino-1-methyl-1H-pyrazol-5-yl)-3-bromobenzamide	4-(4-amino-1-methyl-1H-pyrazol-5-yl)-3-bromobenzamide	分子量：295.14 密度：N/A 沸点：N/A 熔点：N/A	2137825-36-4	C₁₁H₁₁BrN₄O
ethyl 2-[(5E)-8-methyl-2,3,4,5-tetrahydro-1-benzoxepin-5-ylidene]acetate	ethyl 2-[(5E)-8-methyl-2,3,4,5-tetrahydro-1-benzoxepin-5-ylidene]acetate	分子量：246.30 密度：N/A 沸点：N/A 熔点：N/A	2172607-78-0	C₁₅H₁₈O₃
Ethyl 1-{1-oxaspiro[4.4]nonan-4-yl}piperidine-3-carboxylate	Ethyl 1-{1-oxaspiro[4.4]nonan-4-yl}piperidine-3-carboxylate	分子量：281.39 密度：N/A 沸点：N/A 熔点：N/A	2138010-15-6	C₁₆H₂₇NO₃
(1-{1-Oxaspiro[4.4]nonan-4-yl}piperidin-3-yl)methanol	(1-{1-Oxaspiro[4.4]nonan-4-yl}piperidin-3-yl)methanol	分子量：239.35 密度：N/A 沸点：N/A 熔点：N/A	2138380-37-5	C₁₄H₂₅NO₂
Methyl 1-{1-oxaspiro[4.4]nonan-4-yl}piperidine-4-carboxylate	Methyl 1-{1-oxaspiro[4.4]nonan-4-yl}piperidine-4-carboxylate	分子量：267.36 密度：N/A 沸点：N/A 熔点：N/A	2138380-52-4	C₁₅H₂₅NO₃
2-(Butan-2-yl)-3-hydrazinyl-5-methoxyquinoline	2-(Butan-2-yl)-3-hydrazinyl-5-methoxyquinoline	分子量：245.32 密度：N/A 沸点：N/A 熔点：N/A	2137592-96-0	C₁₄H₁₉N₃O
5-(2-Methylpropanesulfonyl)-2-oxo-1,2-dihydropyridine-3-carboxylic acid	5-(2-Methylpropanesulfonyl)-2-oxo-1,2-dihydropyridine-3-carboxylic acid	分子量：259.28 密度：N/A 沸点：N/A 熔点：N/A	2138268-39-8	C₁₀H₁₃NO₅S
5-(2-Methoxyethanesulfonyl)-2-oxo-1,2-dihydropyridine-3-carboxylic acid	5-(2-Methoxyethanesulfonyl)-2-oxo-1,2-dihydropyridine-3-carboxylic acid	分子量：261.25 密度：N/A 沸点：N/A 熔点：N/A	2138010-76-9	C₉H₁₁NO₆S
4-(2-Bromoethenyl)-2,6-dimethoxyphenyl acetate	4-(2-Bromoethenyl)-2,6-dimethoxyphenyl acetate	分子量：301.13 密度：N/A 沸点：N/A 熔点：N/A	2138805-39-5	C₁₂H₁₃BrO₄
propan-2-yl 2-[4-(2-bromoethenyl)-3,5-dimethyl-1H-pyrazol-1-yl]acetate	propan-2-yl 2-[4-(2-bromoethenyl)-3,5-dimethyl-1H-pyrazol-1-yl]acetate	分子量：301.18 密度：N/A 沸点：N/A 熔点：N/A	2138808-37-2	C₁₂H₁₇BrN₂O₂
(5S)-3-(but-3-en-2-yl)-5-tert-butyl-2-sulfanylideneimidazolidin-4-one	(5S)-3-(but-3-en-2-yl)-5-tert-butyl-2-sulfanylideneimidazolidin-4-one	分子量：226.34 密度：N/A 沸点：N/A 熔点：N/A	2166395-94-2	C₁₁H₁₈N₂OS