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
4-(2-Fluorophenyl)piperidin-3-ol	4-(2-Fluorophenyl)piperidin-3-ol	分子量：195.23 密度：N/A 沸点：N/A 熔点：N/A	1239205-11-8	C₁₁H₁₄FNO
N-methyl-N-(2,2,2-trifluoroethyl)piperidine-3-carboxamide	N-methyl-N-(2,2,2-trifluoroethyl)piperidine-3-carboxamide	分子量：224.22 密度：N/A 沸点：N/A 熔点：N/A	1184429-01-3	C₉H₁₅F₃N₂O
Tert-butyl 3-(1,3-thiazol-5-yl)-2,5-dihydropyrrole-1-carboxylate	Tert-butyl 3-(1,3-thiazol-5-yl)-2,5-dihydropyrrole-1-carboxylate	分子量：252.33 密度：N/A 沸点：N/A 熔点：N/A	1239205-17-4	C₁₂H₁₆N₂O₂S
2-(6-chloro-3,4-dihydro-2H-1,4-benzoxazin-4-yl)acetic acid	2-(6-chloro-3,4-dihydro-2H-1,4-benzoxazin-4-yl)acetic acid	分子量：227.64 密度：N/A 沸点：N/A 熔点：N/A	1354962-23-4	C₁₀H₁₀ClNO₃
2-methanesulfonyl-N-methylcyclopentan-1-amine	2-methanesulfonyl-N-methylcyclopentan-1-amine	分子量：177.27 密度：N/A 沸点：N/A 熔点：N/A	1343125-83-6	C₇H₁₅NO₂S
3-(4-Methyl-3-nitrophenyl)-1,3-oxazolidin-2-one	3-(4-Methyl-3-nitrophenyl)-1,3-oxazolidin-2-one	分子量：222.20 密度：N/A 沸点：N/A 熔点：N/A	1354960-17-0	C₁₀H₁₀N₂O₄
5-Methyl-1-phenylpyrrolidin-3-amine	5-Methyl-1-phenylpyrrolidin-3-amine	分子量：176.26 密度：N/A 沸点：N/A 熔点：N/A	1354962-45-0	C₁₁H₁₆N₂
2-(4-Bromothiophen-2-yl)-2-(dimethylamino)acetic acid	2-(4-Bromothiophen-2-yl)-2-(dimethylamino)acetic acid	分子量：264.14 密度：N/A 沸点：N/A 熔点：N/A	1248050-64-7	C₈H₁₀BrNO₂S
Tert-butyl 4-(4-ethoxyphenyl)-3-hydroxypiperidine-1-carboxylate	Tert-butyl 4-(4-ethoxyphenyl)-3-hydroxypiperidine-1-carboxylate	分子量：321.4 密度：N/A 沸点：N/A 熔点：N/A	1354963-21-5	C₁₈H₂₇NO₄
Tert-butyl 3-oxo-4-[3-(trifluoromethyl)phenyl]piperidine-1-carboxylate	Tert-butyl 3-oxo-4-[3-(trifluoromethyl)phenyl]piperidine-1-carboxylate	分子量：343.34 密度：N/A 沸点：N/A 熔点：N/A	1354951-38-4	C₁₇H₂₀F₃NO₃
Tert-butyl 4-(4-ethylphenyl)-3-hydroxypiperidine-1-carboxylate	Tert-butyl 4-(4-ethylphenyl)-3-hydroxypiperidine-1-carboxylate	分子量：305.4 密度：N/A 沸点：N/A 熔点：N/A	1354957-71-3	C₁₈H₂₇NO₃
Tert-butyl 4-(4-fluoro-2-methylphenyl)-3-hydroxypiperidine-1-carboxylate	Tert-butyl 4-(4-fluoro-2-methylphenyl)-3-hydroxypiperidine-1-carboxylate	分子量：309.4 密度：N/A 沸点：N/A 熔点：N/A	1354951-72-6	C₁₇H₂₄FNO₃
Tert-butyl 3-amino-4-(4-fluoro-3-methylphenyl)piperidine-1-carboxylate	Tert-butyl 3-amino-4-(4-fluoro-3-methylphenyl)piperidine-1-carboxylate	分子量：308.4 密度：N/A 沸点：N/A 熔点：N/A	1354958-16-9	C₁₇H₂₅FN₂O₂
ethyl 4-((1E)-3-tert-butoxy-3-oxoprop-1-en-1-yl)benzoate	ethyl 4-((1E)-3-tert-butoxy-3-oxoprop-1-en-1-yl)benzoate	分子量：276.33 密度：N/A 沸点：N/A 熔点：N/A	500344-18-3	C₁₆H₂₀O₄
8-(piperidin-1-ylsulfonyl)[1,2,4]triazolo[4,3-a]pyridine-3(2H)-thione	8-(piperidin-1-ylsulfonyl)[1,2,4]triazolo[4,3-a]pyridine-3(2H)-thione	分子量：298.4 密度：N/A 沸点：N/A 熔点：N/A	1291486-49-1	C₁₁H₁₄N₄O₂S₂
1-(3-Fluorophenyl)-4-oxo-1,4-dihydropyridazine-3-carboxylic acid	1-(3-Fluorophenyl)-4-oxo-1,4-dihydropyridazine-3-carboxylic acid	分子量：234.18 密度：N/A 沸点：N/A 熔点：N/A	1291486-99-1	C₁₁H₇FN₂O₃
1-(3,4-Difluorophenyl)-4-oxo-1,4-dihydropyridazine-3-carboxylic acid	1-(3,4-Difluorophenyl)-4-oxo-1,4-dihydropyridazine-3-carboxylic acid	分子量：252.17 密度：N/A 沸点：N/A 熔点：N/A	1291487-13-2	C₁₁H₆F₂N₂O₃
(3,5-dimethyl-1H-pyrazol-1-yl)(3-{[4-(3-methoxyphenyl)piperazin-1-yl]sulfonyl}thiophen-2-yl)methanone	(3,5-dimethyl-1H-pyrazol-1-yl)(3-{[4-(3-methoxyphenyl)piperazin-1-yl]sulfonyl}thiophen-2-yl)methanone	分子量：460.6 密度：N/A 沸点：N/A 熔点：N/A	1291487-00-7	C₂₁H₂₄N₄O₄S₂
(3-{[4-(2-chlorophenyl)piperazin-1-yl]sulfonyl}thiophen-2-yl)(3,5-dimethyl-1H-pyrazol-1-yl)methanone	(3-{[4-(2-chlorophenyl)piperazin-1-yl]sulfonyl}thiophen-2-yl)(3,5-dimethyl-1H-pyrazol-1-yl)methanone	分子量：465.0 密度：N/A 沸点：N/A 熔点：N/A	1291487-01-8	C₂₀H₂₁ClN₄O₃S₂
3-{[(4-Bromophenyl)sulfonyl](methyl)amino}thiophene-2-carboxylic acid	3-{[(4-Bromophenyl)sulfonyl](methyl)amino}thiophene-2-carboxylic acid	分子量：376.3 密度：N/A 沸点：N/A 熔点：N/A	1291486-57-1	C₁₂H₁₀BrNO₄S₂
3-ethyl-N-phenyl-[1,2,4]triazolo[4,3-a]pyridine-8-sulfonamide	3-ethyl-N-phenyl-[1,2,4]triazolo[4,3-a]pyridine-8-sulfonamide	分子量：302.35 密度：N/A 沸点：N/A 熔点：N/A	1291487-06-3	C₁₄H₁₄N₄O₂S
N-(4-ethylphenyl)-[1,2,4]triazolo[4,3-a]pyridine-8-sulfonamide	N-(4-ethylphenyl)-[1,2,4]triazolo[4,3-a]pyridine-8-sulfonamide	分子量：302.35 密度：N/A 沸点：N/A 熔点：N/A	1291486-69-5	C₁₄H₁₄N₄O₂S
(7-methyl-4,4-dioxido-1H-4,1,2-benzothiadiazin-3-yl)(morpholin-4-yl)methanone	(7-methyl-4,4-dioxido-1H-4,1,2-benzothiadiazin-3-yl)(morpholin-4-yl)methanone	分子量：309.34 密度：N/A 沸点：N/A 熔点：N/A	1474055-37-2	C₁₃H₁₅N₃O₄S
azepan-1-yl(7-methyl-4,4-dioxido-1H-4,1,2-benzothiadiazin-3-yl)methanone	azepan-1-yl(7-methyl-4,4-dioxido-1H-4,1,2-benzothiadiazin-3-yl)methanone	分子量：321.4 密度：N/A 沸点：N/A 熔点：N/A	1474056-81-9	C₁₅H₁₉N₃O₃S
1-[4-(4-Hydroxy-1-butyn-1-yl)-3-methylphenyl]-2,5-pyrrolidinedione	1-[4-(4-Hydroxy-1-butyn-1-yl)-3-methylphenyl]-2,5-pyrrolidinedione	分子量：257.28 密度：N/A 沸点：N/A 熔点：N/A	1184200-71-2	C₁₅H₁₅NO₃
4-[4-(4-fluorophenyl)piperazino]-4-oxo-N-(3-pyridyl)butanamide	4-[4-(4-fluorophenyl)piperazino]-4-oxo-N-(3-pyridyl)butanamide	分子量：356.4 密度：N/A 沸点：N/A 熔点：N/A	1224128-73-7	C₁₉H₂₁FN₄O₂
1-(4-Phenylpiperazino)-4-[4-(2-pyridyl)piperazino]-1,4-butanedione	1-(4-Phenylpiperazino)-4-[4-(2-pyridyl)piperazino]-1,4-butanedione	分子量：407.5 密度：N/A 沸点：N/A 熔点：N/A	1232795-82-2	C₂₃H₂₉N₅O₂
N-(4-fluorobenzyl)-2-[3-(2-fluoro-4-methoxyphenyl)-6-oxopyridazin-1(6H)-yl]acetamide	N-(4-fluorobenzyl)-2-[3-(2-fluoro-4-methoxyphenyl)-6-oxopyridazin-1(6H)-yl]acetamide	分子量：385.4 密度：N/A 沸点：N/A 熔点：N/A	1232776-79-2	C₂₀H₁₇F₂N₃O₃
propyl 4-(2-oxo-4-{[4-(1H-1,2,4-triazol-1-ylmethyl)phenyl]carbamoyl}pyrrolidin-1-yl)benzoate	propyl 4-(2-oxo-4-{[4-(1H-1,2,4-triazol-1-ylmethyl)phenyl]carbamoyl}pyrrolidin-1-yl)benzoate	分子量：447.5 密度：N/A 沸点：N/A 熔点：N/A	1232802-82-2	C₂₄H₂₅N₅O₄
2,5-dichloro-N-(2-methyl-1H-benzimidazol-5-yl)benzenesulfonamide	2,5-dichloro-N-(2-methyl-1H-benzimidazol-5-yl)benzenesulfonamide	分子量：356.2 密度：N/A 沸点：N/A 熔点：N/A	1232798-27-4	C₁₄H₁₁Cl₂N₃O₂S
2-[acetyl(benzyl)amino]-N-(1H-indol-6-yl)-4-methyl-1,3-thiazole-5-carboxamide	2-[acetyl(benzyl)amino]-N-(1H-indol-6-yl)-4-methyl-1,3-thiazole-5-carboxamide	分子量：404.5 密度：N/A 沸点：N/A 熔点：N/A	1232693-54-7	C₂₂H₂₀N₄O₂S
2-[acetyl(tetrahydro-2-furanylmethyl)amino]-N-(1H-indol-5-yl)-4-methyl-1,3-thiazole-5-carboxamide	2-[acetyl(tetrahydro-2-furanylmethyl)amino]-N-(1H-indol-5-yl)-4-methyl-1,3-thiazole-5-carboxamide	分子量：398.5 密度：N/A 沸点：N/A 熔点：N/A	1224164-65-1	C₂₀H₂₂N₄O₃S
N-[3-(acetylamino)phenyl]-8-methoxy-4-oxo-1,4-dihydroquinoline-3-carboxamide	N-[3-(acetylamino)phenyl]-8-methoxy-4-oxo-1,4-dihydroquinoline-3-carboxamide	分子量：351.4 密度：N/A 沸点：N/A 熔点：N/A	1232793-37-1	C₁₉H₁₇N₃O₄
Methyl 2-bromo-4-(bromomethyl)-5-chlorobenzoate	Methyl 2-bromo-4-(bromomethyl)-5-chlorobenzoate	分子量：342.41 密度：N/A 沸点：N/A 熔点：N/A	1313513-41-5	C₉H₇Br₂ClO₂
N-[(2E)-5-(propan-2-yl)-1,3,4-thiadiazol-2(3H)-ylidene]-2-[1-(1H-tetrazol-1-ylmethyl)cyclohexyl]acetamide	N-[(2E)-5-(propan-2-yl)-1,3,4-thiadiazol-2(3H)-ylidene]-2-[1-(1H-tetrazol-1-ylmethyl)cyclohexyl]acetamide	分子量：349.5 密度：N/A 沸点：N/A 熔点：N/A	1246045-80-6	C₁₅H₂₃N₇OS
4-(8-Nitroquinolin-4-yloxy)phenylamine	4-(8-Nitroquinolin-4-yloxy)phenylamine	分子量：281.27 密度：N/A 沸点：N/A 熔点：N/A	1174997-03-5	C₁₅H₁₁N₃O₃
5'-Iodo-2,2'-bithiophene-5-carbaldehyde	5'-Iodo-2,2'-bithiophene-5-carbaldehyde	分子量：320.2 密度：N/A 沸点：N/A 熔点：N/A	18494-77-4	C₉H₅IOS₂
3-Butyl-4,4-dimethylcyclohexan-1-one	3-Butyl-4,4-dimethylcyclohexan-1-one	分子量：182.30 密度：N/A 沸点：N/A 熔点：N/A	109539-15-3	C₁₂H₂₂O
N-(3-methoxyphenyl)-2-([1,2,4]triazolo[4,3-b]pyridazin-6-ylsulfanyl)acetamide	N-(3-methoxyphenyl)-2-([1,2,4]triazolo[4,3-b]pyridazin-6-ylsulfanyl)acetamide	分子量：315.35 密度：N/A 沸点：N/A 熔点：N/A	1224166-39-5	C₁₄H₁₃N₅O₂S
2-(3-methoxyphenyl)-4-methyl-N-[(2E)-5-(tetrahydrofuran-2-yl)-1,3,4-thiadiazol-2(3H)-ylidene]-1,3-thiazole-5-carboxamide	2-(3-methoxyphenyl)-4-methyl-N-[(2E)-5-(tetrahydrofuran-2-yl)-1,3,4-thiadiazol-2(3H)-ylidene]-1,3-thiazole-5-carboxamide	分子量：402.5 密度：N/A 沸点：N/A 熔点：N/A	1232821-54-3	C₁₈H₁₈N₄O₃S₂
Ethyl 4-{[4-hydroxy-6-(trifluoromethoxy)quinolin-3-yl]carbonyl}piperazine-1-carboxylate	Ethyl 4-{[4-hydroxy-6-(trifluoromethoxy)quinolin-3-yl]carbonyl}piperazine-1-carboxylate	分子量：413.3 密度：N/A 沸点：N/A 熔点：N/A	1224165-78-9	C₁₈H₁₈F₃N₃O₅
2-[(tetrahydrofuran-2-ylmethyl)amino]-N-(1,3-thiazol-2-yl)-1,3-thiazole-4-carboxamide	2-[(tetrahydrofuran-2-ylmethyl)amino]-N-(1,3-thiazol-2-yl)-1,3-thiazole-4-carboxamide	分子量：310.4 密度：N/A 沸点：N/A 熔点：N/A	1232805-63-8	C₁₂H₁₄N₄O₂S₂
N-(5-butyl-1,3,4-thiadiazol-2-yl)-1-methyl-5-(1H-pyrrol-1-yl)-1H-pyrazole-4-carboxamide	N-(5-butyl-1,3,4-thiadiazol-2-yl)-1-methyl-5-(1H-pyrrol-1-yl)-1H-pyrazole-4-carboxamide	分子量：330.4 密度：N/A 沸点：N/A 熔点：N/A	1232825-21-6	C₁₅H₁₈N₆OS
1-[6-(3,4-Dichlorophenyl)-4-pyrimidinyl]-1,3-dihydro-2H-imidazol-2-one	1-[6-(3,4-Dichlorophenyl)-4-pyrimidinyl]-1,3-dihydro-2H-imidazol-2-one	分子量：307.13 密度：N/A 沸点：N/A 熔点：N/A	1319157-21-5	C₁₃H₈Cl₂N₄O
1-[6-(3,4-Dichlorophenyl)-4-pyrimidinyl]-1,3-dihydro-3-methyl-2H-imidazol-2-one	1-[6-(3,4-Dichlorophenyl)-4-pyrimidinyl]-1,3-dihydro-3-methyl-2H-imidazol-2-one	分子量：321.2 密度：N/A 沸点：N/A 熔点：N/A	1319157-23-7	C₁₄H₁₀Cl₂N₄O
N-[2-(methoxymethyl)-1H-benzimidazol-5-yl]-5-oxo-1-phenylpyrrolidine-3-carboxamide	N-[2-(methoxymethyl)-1H-benzimidazol-5-yl]-5-oxo-1-phenylpyrrolidine-3-carboxamide	分子量：364.4 密度：N/A 沸点：N/A 熔点：N/A	1232779-08-6	C₂₀H₂₀N₄O₃
2-{2-[4-(4-chlorophenyl)piperazino]-2-oxoethyl}-6-(4-fluoro-2-methoxyphenyl)-3(2H)-pyridazinone	2-{2-[4-(4-chlorophenyl)piperazino]-2-oxoethyl}-6-(4-fluoro-2-methoxyphenyl)-3(2H)-pyridazinone	分子量：456.9 密度：N/A 沸点：N/A 熔点：N/A	1232779-81-5	C₂₃H₂₂ClFN₄O₃
2-[3-(4-fluorophenyl)-6-oxopyridazin-1(6H)-yl]-N-[(2E)-1,3,4-thiadiazol-2(3H)-ylidene]acetamide	2-[3-(4-fluorophenyl)-6-oxopyridazin-1(6H)-yl]-N-[(2E)-1,3,4-thiadiazol-2(3H)-ylidene]acetamide	分子量：331.33 密度：N/A 沸点：N/A 熔点：N/A	1232819-92-9	C₁₄H₁₀FN₅O₂S
N-cyclopentyl-2-[3-(2-fluoro-4-methoxyphenyl)-6-oxopyridazin-1(6H)-yl]acetamide	N-cyclopentyl-2-[3-(2-fluoro-4-methoxyphenyl)-6-oxopyridazin-1(6H)-yl]acetamide	分子量：345.4 密度：N/A 沸点：N/A 熔点：N/A	1232797-38-4	C₁₈H₂₀FN₃O₃
2-[1-(1H-tetrazol-1-ylmethyl)cyclohexyl]-N-(1,3-thiazol-2-yl)acetamide	2-[1-(1H-tetrazol-1-ylmethyl)cyclohexyl]-N-(1,3-thiazol-2-yl)acetamide	分子量：306.39 密度：N/A 沸点：N/A 熔点：N/A	1232793-67-7	C₁₃H₁₈N₆OS