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
2-[4-(difluoromethyl)-1-(propan-2-yl)-1H-pyrazol-3-yl]-5-fluorobenzonitrile	2-[4-(difluoromethyl)-1-(propan-2-yl)-1H-pyrazol-3-yl]-5-fluorobenzonitrile	分子量：279.26 密度：N/A 沸点：N/A 熔点：N/A	2138226-69-2	C₁₄H₁₂F₃N₃
3-(2-chloro-1-methyl-1H-imidazol-5-yl)-4-(difluoromethyl)-1-(propan-2-yl)-1H-pyrazole	3-(2-chloro-1-methyl-1H-imidazol-5-yl)-4-(difluoromethyl)-1-(propan-2-yl)-1H-pyrazole	分子量：274.70 密度：N/A 沸点：N/A 熔点：N/A	2138226-74-9	C₁₁H₁₃ClF₂N₄
1-{4-[4-(difluoromethyl)-1-(propan-2-yl)-1H-pyrazol-3-yl]phenyl}ethan-1-amine	1-{4-[4-(difluoromethyl)-1-(propan-2-yl)-1H-pyrazol-3-yl]phenyl}ethan-1-amine	分子量：279.33 密度：N/A 沸点：N/A 熔点：N/A	2137638-79-8	C₁₅H₁₉F₂N₃
4-chloro-2-[4-(difluoromethyl)-1-(propan-2-yl)-1H-pyrazol-3-yl]aniline	4-chloro-2-[4-(difluoromethyl)-1-(propan-2-yl)-1H-pyrazol-3-yl]aniline	分子量：285.72 密度：N/A 沸点：N/A 熔点：N/A	2138226-77-2	C₁₃H₁₄ClF₂N₃
3-bromo-5-[4-(difluoromethyl)-1-(propan-2-yl)-1H-pyrazol-3-yl]-4-methylpyridine	3-bromo-5-[4-(difluoromethyl)-1-(propan-2-yl)-1H-pyrazol-3-yl]-4-methylpyridine	分子量：330.17 密度：N/A 沸点：N/A 熔点：N/A	2138226-99-8	C₁₃H₁₄BrF₂N₃
1-[4-(difluoromethyl)-1-(propan-2-yl)-1H-pyrazol-3-yl]cyclobutan-1-amine	1-[4-(difluoromethyl)-1-(propan-2-yl)-1H-pyrazol-3-yl]cyclobutan-1-amine	分子量：229.27 密度：N/A 沸点：N/A 熔点：N/A	2138245-45-9	C₁₁H₁₇F₂N₃
(2,1,3-Benzoxadiazol-5-yl)methanesulfonamide	(2,1,3-Benzoxadiazol-5-yl)methanesulfonamide	分子量：213.22 密度：N/A 沸点：N/A 熔点：N/A	2137638-89-0	C₇H₇N₃O₃S
methyl 1-[2-(thian-4-yloxy)ethyl]-1H-1,2,3-triazole-4-carboxylate	methyl 1-[2-(thian-4-yloxy)ethyl]-1H-1,2,3-triazole-4-carboxylate	分子量：271.34 密度：N/A 沸点：N/A 熔点：N/A	2138414-20-5	C₁₁H₁₇N₃O₃S
2-{1-[2-(thian-4-yloxy)ethyl]-1H-1,2,3-triazol-4-yl}ethan-1-ol	2-{1-[2-(thian-4-yloxy)ethyl]-1H-1,2,3-triazol-4-yl}ethan-1-ol	分子量：257.35 密度：N/A 沸点：N/A 熔点：N/A	2137639-02-0	C₁₁H₁₉N₃O₂S
2-{1-[2-(thian-4-yloxy)ethyl]-1H-1,2,3-triazol-4-yl}butan-2-ol	2-{1-[2-(thian-4-yloxy)ethyl]-1H-1,2,3-triazol-4-yl}butan-2-ol	分子量：285.41 密度：N/A 沸点：N/A 熔点：N/A	2137559-25-0	C₁₃H₂₃N₃O₂S
4-(2-chloroethyl)-1-[2-(thian-4-yloxy)ethyl]-1H-1,2,3-triazole	4-(2-chloroethyl)-1-[2-(thian-4-yloxy)ethyl]-1H-1,2,3-triazole	分子量：275.80 密度：N/A 沸点：N/A 熔点：N/A	2138227-03-7	C₁₁H₁₈ClN₃OS
4-[(butan-2-yl)amino]-4H,5H,6H,7H,8H-pyrazolo[1,5-a]azepine-2-carboxylic acid	4-[(butan-2-yl)amino]-4H,5H,6H,7H,8H-pyrazolo[1,5-a]azepine-2-carboxylic acid	分子量：251.32 密度：N/A 沸点：N/A 熔点：N/A	2138245-78-8	C₁₃H₂₁N₃O₂
4-(butylamino)-4H,5H,6H,7H,8H-pyrazolo[1,5-a]azepine-2-carboxylic acid	4-(butylamino)-4H,5H,6H,7H,8H-pyrazolo[1,5-a]azepine-2-carboxylic acid	分子量：251.32 密度：N/A 沸点：N/A 熔点：N/A	2137559-29-4	C₁₃H₂₁N₃O₂
4-(methylamino)-4H,5H,6H,7H,8H-pyrazolo[1,5-a]azepine-2-carboxylic acid	4-(methylamino)-4H,5H,6H,7H,8H-pyrazolo[1,5-a]azepine-2-carboxylic acid	分子量：209.24 密度：N/A 沸点：N/A 熔点：N/A	2138245-85-7	C₁₀H₁₅N₃O₂
4-[(2-methylpropyl)amino]-4H,5H,6H,7H,8H-pyrazolo[1,5-a]azepine-2-carboxylic acid	4-[(2-methylpropyl)amino]-4H,5H,6H,7H,8H-pyrazolo[1,5-a]azepine-2-carboxylic acid	分子量：251.32 密度：N/A 沸点：N/A 熔点：N/A	2137639-13-3	C₁₃H₂₁N₃O₂
4-[(1-carboxypropyl)amino]-4H,5H,6H,7H,8H-pyrazolo[1,5-a]azepine-2-carboxylic acid	4-[(1-carboxypropyl)amino]-4H,5H,6H,7H,8H-pyrazolo[1,5-a]azepine-2-carboxylic acid	分子量：281.31 密度：N/A 沸点：N/A 熔点：N/A	2137443-73-1	C₁₃H₁₉N₃O₄
4-[methyl(propan-2-yl)amino]-4H,5H,6H,7H,8H-pyrazolo[1,5-a]azepine-2-carboxylic acid	4-[methyl(propan-2-yl)amino]-4H,5H,6H,7H,8H-pyrazolo[1,5-a]azepine-2-carboxylic acid	分子量：251.32 密度：N/A 沸点：N/A 熔点：N/A	2137828-66-9	C₁₃H₂₁N₃O₂
4-[ethyl(propyl)amino]-4H,5H,6H,7H,8H-pyrazolo[1,5-a]azepine-2-carboxylic acid	4-[ethyl(propyl)amino]-4H,5H,6H,7H,8H-pyrazolo[1,5-a]azepine-2-carboxylic acid	分子量：265.35 密度：N/A 沸点：N/A 熔点：N/A	2138245-91-5	C₁₄H₂₃N₃O₂
4-[methyl(propyl)amino]-4H,5H,6H,7H,8H-pyrazolo[1,5-a]azepine-2-carboxylic acid	4-[methyl(propyl)amino]-4H,5H,6H,7H,8H-pyrazolo[1,5-a]azepine-2-carboxylic acid	分子量：251.32 密度：N/A 沸点：N/A 熔点：N/A	2137639-17-7	C₁₃H₂₁N₃O₂
2-(Difluoromethyl)-8-methoxy-1,2,3,4-tetrahydroquinolin-3-ol	2-(Difluoromethyl)-8-methoxy-1,2,3,4-tetrahydroquinolin-3-ol	分子量：229.22 密度：N/A 沸点：N/A 熔点：N/A	2137532-10-4	C₁₁H₁₃F₂NO₂
5-oxo-4H,5H,6H,7H,8H,9H-pyrazolo[1,5-a][1,3]diazocine-2-carboxylic acid	5-oxo-4H,5H,6H,7H,8H,9H-pyrazolo[1,5-a][1,3]diazocine-2-carboxylic acid	分子量：209.20 密度：N/A 沸点：N/A 熔点：N/A	2137639-19-9	C₉H₁₁N₃O₃
2-(1-{[(9H-fluoren-9-yl)methoxy]carbonyl}azetidin-3-yl)benzoic acid	2-(1-{[(9H-fluoren-9-yl)methoxy]carbonyl}azetidin-3-yl)benzoic acid	分子量：399.4 密度：N/A 沸点：N/A 熔点：N/A	2138246-71-4	C₂₅H₂₁NO₄
2-cyclobutyl-N-ethylbenzene-1-sulfonamide	2-cyclobutyl-N-ethylbenzene-1-sulfonamide	分子量：239.34 密度：N/A 沸点：N/A 熔点：N/A	2138414-30-7	C₁₂H₁₇NO₂S
4-(2-Bromo-6-fluorophenyl)-2-(difluoromethyl)pyridine	4-(2-Bromo-6-fluorophenyl)-2-(difluoromethyl)pyridine	分子量：302.09 密度：N/A 沸点：N/A 熔点：N/A	2138227-25-3	C₁₂H₇BrF₃N
4-(3-Bromo-2-methylphenyl)-2-(difluoromethyl)pyridine	4-(3-Bromo-2-methylphenyl)-2-(difluoromethyl)pyridine	分子量：298.13 密度：N/A 沸点：N/A 熔点：N/A	2138414-32-9	C₁₃H₁₀BrF₂N
4-(2,6-Dichloro-4-fluorophenyl)-2-(difluoromethyl)pyridine	4-(2,6-Dichloro-4-fluorophenyl)-2-(difluoromethyl)pyridine	分子量：292.08 密度：N/A 沸点：N/A 熔点：N/A	2138414-34-1	C₁₂H₆Cl₂F₃N
4-[3-(Bromomethyl)phenyl]-2-(difluoromethyl)pyridine	4-[3-(Bromomethyl)phenyl]-2-(difluoromethyl)pyridine	分子量：298.13 密度：N/A 沸点：N/A 熔点：N/A	2138414-40-9	C₁₃H₁₀BrF₂N
4-[4-(Bromomethyl)phenyl]-2-(difluoromethyl)pyridine	4-[4-(Bromomethyl)phenyl]-2-(difluoromethyl)pyridine	分子量：298.13 密度：N/A 沸点：N/A 熔点：N/A	2138227-38-8	C₁₃H₁₀BrF₂N
5-[2-(Difluoromethyl)pyridin-4-yl]pyrimidin-2-amine	5-[2-(Difluoromethyl)pyridin-4-yl]pyrimidin-2-amine	分子量：222.19 密度：N/A 沸点：N/A 熔点：N/A	2137639-27-9	C₁₀H₈F₂N₄
2-Chloro-4-[2-(difluoromethyl)pyridin-4-yl]benzonitrile	2-Chloro-4-[2-(difluoromethyl)pyridin-4-yl]benzonitrile	分子量：264.66 密度：N/A 沸点：N/A 熔点：N/A	2137639-29-1	C₁₃H₇ClF₂N₂
2-(Difluoromethyl)-4-(4-fluoro-2-nitrophenyl)pyridine	2-(Difluoromethyl)-4-(4-fluoro-2-nitrophenyl)pyridine	分子量：268.19 密度：N/A 沸点：N/A 熔点：N/A	2138414-43-2	C₁₂H₇F₃N₂O₂
5-[2-(Difluoromethyl)pyridin-4-yl]-2-methylbenzonitrile	5-[2-(Difluoromethyl)pyridin-4-yl]-2-methylbenzonitrile	分子量：244.24 密度：N/A 沸点：N/A 熔点：N/A	2138246-81-6	C₁₄H₁₀F₂N₂
Ethyl 5-[2-(difluoromethyl)pyridin-4-yl]pyridine-3-carboxylate	Ethyl 5-[2-(difluoromethyl)pyridin-4-yl]pyridine-3-carboxylate	分子量：278.25 密度：N/A 沸点：N/A 熔点：N/A	2137828-90-9	C₁₄H₁₂F₂N₂O₂
Methyl 3-[2-(difluoromethyl)pyridin-4-yl]-5-hydroxybenzoate	Methyl 3-[2-(difluoromethyl)pyridin-4-yl]-5-hydroxybenzoate	分子量：279.24 密度：N/A 沸点：N/A 熔点：N/A	2138246-90-7	C₁₄H₁₁F₂NO₃
1-[3-(5-Cyclobutyl-1,2,4-oxadiazol-3-yl)phenyl]ethan-1-one	1-[3-(5-Cyclobutyl-1,2,4-oxadiazol-3-yl)phenyl]ethan-1-one	分子量：242.27 密度：N/A 沸点：N/A 熔点：N/A	2137829-23-1	C₁₄H₁₄N₂O₂
2-methyl-N-(3-methylbutan-2-yl)-1-oxa-4,9-diazaspiro[5.5]undecane-9-carboxamide	2-methyl-N-(3-methylbutan-2-yl)-1-oxa-4,9-diazaspiro[5.5]undecane-9-carboxamide	分子量：283.41 密度：N/A 沸点：N/A 熔点：N/A	2137829-28-6	C₁₅H₂₉N₃O₂
2-methyl-N-(2-methylbutan-2-yl)-1-oxa-4,9-diazaspiro[5.5]undecane-9-carboxamide	2-methyl-N-(2-methylbutan-2-yl)-1-oxa-4,9-diazaspiro[5.5]undecane-9-carboxamide	分子量：283.41 密度：N/A 沸点：N/A 熔点：N/A	2138373-37-0	C₁₅H₂₉N₃O₂
N-tert-butyl-2-methyl-1-oxa-4,9-diazaspiro[5.5]undecane-4-carboxamide	N-tert-butyl-2-methyl-1-oxa-4,9-diazaspiro[5.5]undecane-4-carboxamide	分子量：269.38 密度：N/A 沸点：N/A 熔点：N/A	2137639-44-0	C₁₄H₂₇N₃O₂
2-methyl-N-propyl-1-oxa-4,9-diazaspiro[5.5]undecane-4-carboxamide	2-methyl-N-propyl-1-oxa-4,9-diazaspiro[5.5]undecane-4-carboxamide	分子量：255.36 密度：N/A 沸点：N/A 熔点：N/A	2138247-10-4	C₁₃H₂₅N₃O₂
2-Methyl-9-(propane-1-sulfonyl)-1-oxa-4,9-diazaspiro[5.5]undecane	2-Methyl-9-(propane-1-sulfonyl)-1-oxa-4,9-diazaspiro[5.5]undecane	分子量：276.40 密度：N/A 沸点：N/A 熔点：N/A	2138377-01-0	C₁₂H₂₄N₂O₃S
9-(Butane-1-sulfonyl)-2-methyl-1-oxa-4,9-diazaspiro[5.5]undecane	9-(Butane-1-sulfonyl)-2-methyl-1-oxa-4,9-diazaspiro[5.5]undecane	分子量：290.42 密度：N/A 沸点：N/A 熔点：N/A	2138373-56-3	C₁₃H₂₆N₂O₃S
2-Hydroxy-2-[1-(2-methyl-1,3-thiazol-5-yl)cyclopropyl]acetic acid	2-Hydroxy-2-[1-(2-methyl-1,3-thiazol-5-yl)cyclopropyl]acetic acid	分子量：213.26 密度：N/A 沸点：N/A 熔点：N/A	2229449-59-4	C₉H₁₁NO₃S
1-(5-Chloro-2-hydroxyphenyl)-3-oxocyclobutane-1-carboxylic acid	1-(5-Chloro-2-hydroxyphenyl)-3-oxocyclobutane-1-carboxylic acid	分子量：240.64 密度：N/A 沸点：N/A 熔点：N/A	2229202-74-6	C₁₁H₉ClO₄
5-(1H-1,3-benzodiazol-2-yl)-2-methylpentanoic acid	5-(1H-1,3-benzodiazol-2-yl)-2-methylpentanoic acid	分子量：232.28 密度：N/A 沸点：N/A 熔点：N/A	2228297-53-6	C₁₃H₁₆N₂O₂
3-(4-Bromofuran-2-yl)-2,2-dimethylpropan-1-ol	3-(4-Bromofuran-2-yl)-2,2-dimethylpropan-1-ol	分子量：233.10 密度：N/A 沸点：N/A 熔点：N/A	2228518-90-7	C₉H₁₃BrO₂
4-(3-Aminobut-1-en-1-yl)-3-chlorophenol	4-(3-Aminobut-1-en-1-yl)-3-chlorophenol	分子量：197.66 密度：N/A 沸点：N/A 熔点：N/A	2229654-29-7	C₁₀H₁₂ClNO
2-[1-(3-phenyl-1H-pyrazol-4-yl)cyclopropyl]propan-2-amine	2-[1-(3-phenyl-1H-pyrazol-4-yl)cyclopropyl]propan-2-amine	分子量：241.33 密度：N/A 沸点：N/A 熔点：N/A	2228514-73-4	C₁₅H₁₉N₃
rac-(1R,3R)-3-(1H-indazol-7-yl)-2,2-dimethylcyclopropan-1-amine	rac-(1R,3R)-3-(1H-indazol-7-yl)-2,2-dimethylcyclopropan-1-amine	分子量：201.27 密度：N/A 沸点：N/A 熔点：N/A	2227911-23-9	C₁₂H₁₅N₃
tert-butyl N-[5-(azetidin-2-yl)-2-chlorophenyl]carbamate	tert-butyl N-[5-(azetidin-2-yl)-2-chlorophenyl]carbamate	分子量：282.76 密度：N/A 沸点：N/A 熔点：N/A	2228267-78-3	C₁₄H₁₉ClN₂O₂
methyl (3S)-3-hydroxy-3-(1-methyl-4-nitro-1H-pyrazol-5-yl)propanoate	methyl (3S)-3-hydroxy-3-(1-methyl-4-nitro-1H-pyrazol-5-yl)propanoate	分子量：229.19 密度：N/A 沸点：N/A 熔点：N/A	2227828-42-2	C₈H₁₁N₃O₅