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
(3S,7AS)-3-(tert-butyl)tetrahydro-1H,3H-pyrrolo[1,2-c]oxazol-1-one	(3S,7AS)-3-(tert-butyl)tetrahydro-1H,3H-pyrrolo[1,2-c]oxazol-1-one	分子量：183.25 密度：N/A 沸点：N/A 熔点：N/A	172140-59-9	C₁₀H₁₇NO₂
1,1-Dimethylethyl 2-[(hydroxyamino)carbonyl]-3-oxo-1-piperidinecarboxylate	1,1-Dimethylethyl 2-[(hydroxyamino)carbonyl]-3-oxo-1-piperidinecarboxylate	分子量：258.27 密度：N/A 沸点：N/A 熔点：N/A	122019-54-9	C₁₁H₁₈N₂O₅
7-Chloro-2-hydrazino-4-methylquinoline hydrochloride	7-Chloro-2-hydrazino-4-methylquinoline hydrochloride	分子量：244.12 密度：N/A 沸点：N/A 熔点：N/A	1367706-41-9	C₁₀H₁₁Cl₂N₃
8-Bromo-2-hydrazino-4-methylquinoline hydrochloride	8-Bromo-2-hydrazino-4-methylquinoline hydrochloride	分子量：288.57 密度：N/A 沸点：N/A 熔点：N/A	1367706-59-9	C₁₀H₁₁BrClN₃
tert-Butyl 3-bromo-3-methyl-2-oxopyrrolidine-1-carboxylate	tert-Butyl 3-bromo-3-methyl-2-oxopyrrolidine-1-carboxylate	分子量：278.14 密度：N/A 沸点：N/A 熔点：N/A	171201-54-0	C₁₀H₁₆BrNO₃
2,3-Dichloro-5-(difluoromethoxy)cinnamic acid	2,3-Dichloro-5-(difluoromethoxy)cinnamic acid	分子量：283.05 密度：N/A 沸点：N/A 熔点：N/A	1807411-41-1	C₁₀H₆Cl₂F₂O₃
8-Bromo-4-hydroxyquinoline-3-carbohydrazide	8-Bromo-4-hydroxyquinoline-3-carbohydrazide	分子量：282.09 密度：N/A 沸点：N/A 熔点：N/A	1333255-49-4	C₁₀H₈BrN₃O₂
8-Chloro-3,4-dibromo-2-methylquinoline	8-Chloro-3,4-dibromo-2-methylquinoline	分子量：335.42 密度：N/A 沸点：N/A 熔点：N/A	1333255-38-1	C₁₀H₆Br₂ClN
2-Fluoro-2-[(oxan-2-yl)methyl]propanedioic acid	2-Fluoro-2-[(oxan-2-yl)methyl]propanedioic acid	分子量：220.19 密度：N/A 沸点：N/A 熔点：N/A	2098056-59-6	C₉H₁₃FO₅
N-(azetidin-3-yl)-6-chloro-2-methylpyrimidin-4-amine	N-(azetidin-3-yl)-6-chloro-2-methylpyrimidin-4-amine	分子量：198.65 密度：N/A 沸点：N/A 熔点：N/A	2090590-40-0	C₈H₁₁ClN₄
8-Fluoro-2-hydrazino-4-methylquinoline hydrochloride	8-Fluoro-2-hydrazino-4-methylquinoline hydrochloride	分子量：227.66 密度：N/A 沸点：N/A 熔点：N/A	1367706-46-4	C₁₀H₁₁ClFN₃
8-Methoxy-4-(piperazin-1-yl)quinoline hydrochloride	8-Methoxy-4-(piperazin-1-yl)quinoline hydrochloride	分子量：279.76 密度：N/A 沸点：N/A 熔点：N/A	1333252-19-9	C₁₄H₁₈ClN₃O
1-(6-Chloro-2-methylpyrimidin-4-yl)azetidine-3-carboxylic acid	1-(6-Chloro-2-methylpyrimidin-4-yl)azetidine-3-carboxylic acid	分子量：227.65 密度：N/A 沸点：N/A 熔点：N/A	2091160-18-6	C₉H₁₀ClN₃O₂
(R)-1-(4,4-Difluorocyclohexyl)-8'-methylhexahydro-1'H-spiro[azetidine-3,6'-pyrazino[2,1-c][1,4]oxazine]	(R)-1-(4,4-Difluorocyclohexyl)-8'-methylhexahydro-1'H-spiro[azetidine-3,6'-pyrazino[2,1-c][1,4]oxazine]	分子量：315.40 密度：N/A 沸点：N/A 熔点：N/A	2182755-99-1	C₁₆H₂₇F₂N₃O
5-Cyclopropyl-1-(3-nitrophenyl)-1H-1,2,4-triazole-3-carboxylic acid	5-Cyclopropyl-1-(3-nitrophenyl)-1H-1,2,4-triazole-3-carboxylic acid	分子量：274.23 密度：N/A 沸点：N/A 熔点：N/A	2060052-30-2	C₁₂H₁₀N₄O₄
3-Chloro-6-(3-methylphenyl)-4-(trifluoromethyl)pyridazine	3-Chloro-6-(3-methylphenyl)-4-(trifluoromethyl)pyridazine	分子量：272.65 密度：N/A 沸点：N/A 熔点：N/A	1271475-10-5	C₁₂H₈ClF₃N₂
3-{1-[(benzyloxy)carbonyl]piperidin-4-yl}-1-methyl-1H-pyrazole-5-carboxylic acid	3-{1-[(benzyloxy)carbonyl]piperidin-4-yl}-1-methyl-1H-pyrazole-5-carboxylic acid	分子量：343.4 密度：N/A 沸点：N/A 熔点：N/A	2059946-87-9	C₁₈H₂₁N₃O₄
(5R)-5-[(1R)-2-(Cyclohexylsulfanyl)-1-hydroxyethyl]-3,4-dihydroxy-2,5-dihydrofuran-2-one	(5R)-5-[(1R)-2-(Cyclohexylsulfanyl)-1-hydroxyethyl]-3,4-dihydroxy-2,5-dihydrofuran-2-one	分子量：274.34 密度：N/A 沸点：N/A 熔点：N/A	2059917-16-5	C₁₂H₁₈O₅S
1-{[1,2,4]Triazolo[4,3-a]pyrazin-8-yl}piperidine	1-{[1,2,4]Triazolo[4,3-a]pyrazin-8-yl}piperidine	分子量：203.24 密度：N/A 沸点：N/A 熔点：N/A	1878022-44-6	C₁₀H₁₃N₅
tert-Butyl 5-amino-8-cyano-1,2,3,4-tetrahydroisoquinoline-2-carboxylate	tert-Butyl 5-amino-8-cyano-1,2,3,4-tetrahydroisoquinoline-2-carboxylate	分子量：273.33 密度：N/A 沸点：N/A 熔点：N/A	2060060-35-5	C₁₅H₁₉N₃O₂
(5R)-3,4-Dihydroxy-5-[(1R)-1-hydroxy-2-[(5-methyl-4H-1,2,4-triazol-3-yl)sulfanyl]ethyl]-2,5-dihydrofuran-2-one	(5R)-3,4-Dihydroxy-5-[(1R)-1-hydroxy-2-[(5-methyl-4H-1,2,4-triazol-3-yl)sulfanyl]ethyl]-2,5-dihydrofuran-2-one	分子量：273.27 密度：N/A 沸点：N/A 熔点：N/A	2059911-40-7	C₉H₁₁N₃O₅S
6-Bromo-8-(trifluoromethyl)-1,2,3,4-tetrahydronaphthalen-1-amine	6-Bromo-8-(trifluoromethyl)-1,2,3,4-tetrahydronaphthalen-1-amine	分子量：294.11 密度：N/A 沸点：N/A 熔点：N/A	1337245-19-8	C₁₁H₁₁BrF₃N
8-Bromo-2,3,4,5-tetrahydro-1H-benzo[c]azepin-5-amine dihydrobromide	8-Bromo-2,3,4,5-tetrahydro-1H-benzo[c]azepin-5-amine dihydrobromide	分子量：402.95 密度：N/A 沸点：N/A 熔点：N/A	1798793-67-5	C₁₀H₁₅Br₃N₂
6,7-Dimethoxy-2-(propan-2-yl)-1,2-dihydrophthalazin-1-one	6,7-Dimethoxy-2-(propan-2-yl)-1,2-dihydrophthalazin-1-one	分子量：248.28 密度：N/A 沸点：N/A 熔点：N/A	2060027-67-8	C₁₃H₁₆N₂O₃
3-(3-Methyl-1,2-oxazol-5-yl)pentan-3-amine	3-(3-Methyl-1,2-oxazol-5-yl)pentan-3-amine	分子量：168.24 密度：N/A 沸点：N/A 熔点：N/A	2059971-69-4	C₉H₁₆N₂O
5-Ethynyl-1-methyl-1H-benzo[d]imidazole	5-Ethynyl-1-methyl-1H-benzo[d]imidazole	分子量：156.18 密度：N/A 沸点：N/A 熔点：N/A	1934871-82-5	C₁₀H₈N₂
rac-(2R,3S,4S)-4-hydroxy-1-methyl-2-(1-methyl-1H-pyrazol-4-yl)-5-oxopyrrolidine-3-carboxylic acid	rac-(2R,3S,4S)-4-hydroxy-1-methyl-2-(1-methyl-1H-pyrazol-4-yl)-5-oxopyrrolidine-3-carboxylic acid	分子量：239.23 密度：N/A 沸点：N/A 熔点：N/A	2089246-08-0	C₁₀H₁₃N₃O₄
tert-butyl 3-(aminomethyl)-1-methyl-1H-pyrazole-4-carboxylate	tert-butyl 3-(aminomethyl)-1-methyl-1H-pyrazole-4-carboxylate	分子量：211.26 密度：N/A 沸点：N/A 熔点：N/A	2060030-07-9	C₁₀H₁₇N₃O₂
4-Bromo-2-chloro-1-(2,2,2-trifluoroethyl)benzene	4-Bromo-2-chloro-1-(2,2,2-trifluoroethyl)benzene	分子量：273.48 密度：N/A 沸点：N/A 熔点：N/A	2080412-64-0	C₈H₅BrClF₃
6-chloro-4-hydrazinyl-1,3-dimethyl-1H-pyrazolo[3,4-b]pyridine	6-chloro-4-hydrazinyl-1,3-dimethyl-1H-pyrazolo[3,4-b]pyridine	分子量：211.65 密度：N/A 沸点：N/A 熔点：N/A	2080412-73-1	C₈H₁₀ClN₅
4-Chloro-5,6,7,8-tetrahydro-1,7-naphthyridine-2-carboxylic acid	4-Chloro-5,6,7,8-tetrahydro-1,7-naphthyridine-2-carboxylic acid	分子量：212.63 密度：N/A 沸点：N/A 熔点：N/A	2092852-06-5	C₉H₉ClN₂O₂
Rel-(3aR,3bS,5s,6aR,6bS)-2-(tert-butoxycarbonyl)decahydrocyclopenta[3,4]cyclobuta[1,2-c]pyrrole-5-carboxylic acid	Rel-(3aR,3bS,5s,6aR,6bS)-2-(tert-butoxycarbonyl)decahydrocyclopenta[3,4]cyclobuta[1,2-c]pyrrole-5-carboxylic acid	分子量：281.35 密度：N/A 沸点：N/A 熔点：N/A	2137102-10-2	C₁₅H₂₃NO₄
1-[(tert-Butoxy)carbonyl]-2-methyl-4,5-dihydro-1H-pyrrole-3-carboxylic acid	1-[(tert-Butoxy)carbonyl]-2-methyl-4,5-dihydro-1H-pyrrole-3-carboxylic acid	分子量：227.26 密度：N/A 沸点：N/A 熔点：N/A	2091166-85-5	C₁₁H₁₇NO₄
4-[2-(Piperidin-4-yl)pyrimidin-4-yl]morpholine	4-[2-(Piperidin-4-yl)pyrimidin-4-yl]morpholine	分子量：248.32 密度：N/A 沸点：N/A 熔点：N/A	2060043-10-7	C₁₃H₂₀N₄O
1,3-Dimethylazetidine-3-carbohydrazide	1,3-Dimethylazetidine-3-carbohydrazide	分子量：143.19 密度：N/A 沸点：N/A 熔点：N/A	2089255-13-8	C₆H₁₃N₃O
Glycine, N-[[4-[[(5-fluoro-6-methyl-2-benzothiazolyl)amino]carbonyl]-2-morpholinyl]methyl]-N-methyl-	Glycine, N-[[4-[[(5-fluoro-6-methyl-2-benzothiazolyl)amino]carbonyl]-2-morpholinyl]methyl]-N-methyl-	分子量：396.4 密度：N/A 沸点：N/A 熔点：N/A	2039230-00-5	C₁₇H₂₁FN₄O₄S
1-Cyclobutyl-3-methylazetidine-3-carbohydrazide	1-Cyclobutyl-3-methylazetidine-3-carbohydrazide	分子量：183.25 密度：N/A 沸点：N/A 熔点：N/A	2080412-60-6	C₉H₁₇N₃O
2-Amino-4-(trifluoromethyl)thiophene-3-carboxamide	2-Amino-4-(trifluoromethyl)thiophene-3-carboxamide	分子量：210.18 密度：N/A 沸点：N/A 熔点：N/A	2060031-38-9	C₆H₅F₃N₂OS
5-Amino-4-(ethoxycarbonyl)-3-(trifluoromethyl)thiophene-2-carboxylic acid	5-Amino-4-(ethoxycarbonyl)-3-(trifluoromethyl)thiophene-2-carboxylic acid	分子量：283.23 密度：N/A 沸点：N/A 熔点：N/A	2137815-60-0	C₉H₈F₃NO₄S
Tert-butyl 2-(aminomethyl)pyrimidine-5-carboxylate	Tert-butyl 2-(aminomethyl)pyrimidine-5-carboxylate	分子量：209.24 密度：N/A 沸点：N/A 熔点：N/A	2138152-08-4	C₁₀H₁₅N₃O₂
4-(4-Methylpiperazin-1-yl)-2-(pyridin-2-yl)thieno[2,3-d]pyrimidine-5-carboxylic acid	4-(4-Methylpiperazin-1-yl)-2-(pyridin-2-yl)thieno[2,3-d]pyrimidine-5-carboxylic acid	分子量：355.4 密度：N/A 沸点：N/A 熔点：N/A	2060000-39-5	C₁₇H₁₇N₅O₂S
6-Nitro-[1,2,4]triazolo[1,5-a]pyridine-2-sulfonyl fluoride	6-Nitro-[1,2,4]triazolo[1,5-a]pyridine-2-sulfonyl fluoride	分子量：246.18 密度：N/A 沸点：N/A 熔点：N/A	2092531-53-6	C₆H₃FN₄O₄S
3-(4-Fluoro-5,6,7,8-tetrahydronaphthalen-1-yl)propanoic acid	3-(4-Fluoro-5,6,7,8-tetrahydronaphthalen-1-yl)propanoic acid	分子量：222.25 密度：N/A 沸点：N/A 熔点：N/A	2089277-27-8	C₁₃H₁₅FO₂
3-{1-[(Tert-butoxy)carbonyl]azetidin-3-yl}prop-2-ynoic acid	3-{1-[(Tert-butoxy)carbonyl]azetidin-3-yl}prop-2-ynoic acid	分子量：225.24 密度：N/A 沸点：N/A 熔点：N/A	2059954-20-8	C₁₁H₁₅NO₄
3-(Bromomethyl)-4-chloropyridine-2-carboxylic acid	3-(Bromomethyl)-4-chloropyridine-2-carboxylic acid	分子量：250.48 密度：N/A 沸点：N/A 熔点：N/A	2090416-90-1	C₇H₅BrClNO₂
Tert-butyl 2-chloro-4-(difluoromethyl)-1,3-thiazole-5-carboxylate	Tert-butyl 2-chloro-4-(difluoromethyl)-1,3-thiazole-5-carboxylate	分子量：269.70 密度：N/A 沸点：N/A 熔点：N/A	2060024-91-9	C₉H₁₀ClF₂NO₂S
2-methyl-5-{5H,6H,7H,8H-pyrido[4,3-c]pyridazin-3-yl}-octahydropyrrolo[3,4-c]pyrrole, cis	2-methyl-5-{5H,6H,7H,8H-pyrido[4,3-c]pyridazin-3-yl}-octahydropyrrolo[3,4-c]pyrrole, cis	分子量：259.35 密度：N/A 沸点：N/A 熔点：N/A	2059908-10-8	C₁₄H₂₁N₅
Methyl 2-chloro-5H-pyrrolo[3,2-d]pyrimidine-4-carboxylate	Methyl 2-chloro-5H-pyrrolo[3,2-d]pyrimidine-4-carboxylate	分子量：211.60 密度：N/A 沸点：N/A 熔点：N/A	2089277-65-4	C₈H₆ClN₃O₂
2-(6-Fluoro-1H-indol-3-yl)-N-methyl-2-oxoacetamide	2-(6-Fluoro-1H-indol-3-yl)-N-methyl-2-oxoacetamide	分子量：220.20 密度：N/A 沸点：N/A 熔点：N/A	2089257-38-3	C₁₁H₉FN₂O₂
Methyl 8-methyl-1,2,3,4-tetrahydroquinoline-6-carboxylate	Methyl 8-methyl-1,2,3,4-tetrahydroquinoline-6-carboxylate	分子量：205.25 密度：N/A 沸点：N/A 熔点：N/A	2089256-99-3	C₁₂H₁₅NO₂