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
N-(4-acetamidophenyl)-2-(4-methyl-7-oxo-1-phenyl-1H-pyrazolo[3,4-d]pyridazin-6(7H)-yl)acetamide	N-(4-acetamidophenyl)-2-(4-methyl-7-oxo-1-phenyl-1H-pyrazolo[3,4-d]pyridazin-6(7H)-yl)acetamide	分子量：416.4 密度：N/A 沸点：N/A 熔点：N/A	942008-62-0	C₂₂H₂₀N₆O₃
N-cyclopentyl-2-(4-methyl-7-oxo-1-phenyl-1H-pyrazolo[3,4-d]pyridazin-6(7H)-yl)acetamide	N-cyclopentyl-2-(4-methyl-7-oxo-1-phenyl-1H-pyrazolo[3,4-d]pyridazin-6(7H)-yl)acetamide	分子量：351.4 密度：N/A 沸点：N/A 熔点：N/A	955781-04-1	C₁₉H₂₁N₅O₂
N-[(4-fluorophenyl)methyl]-2-(4-methyl-7-oxo-1-phenylpyrazolo[3,4-d]pyridazin-6-yl)acetamide	N-[(4-fluorophenyl)methyl]-2-(4-methyl-7-oxo-1-phenylpyrazolo[3,4-d]pyridazin-6-yl)acetamide	分子量：391.4 密度：N/A 沸点：N/A 熔点：N/A	941884-20-4	C₂₁H₁₈FN₅O₂
N-(benzo[d][1,3]dioxol-5-ylmethyl)-2-(4-methyl-7-oxo-1-phenyl-1H-pyrazolo[3,4-d]pyridazin-6(7H)-yl)acetamide	N-(benzo[d][1,3]dioxol-5-ylmethyl)-2-(4-methyl-7-oxo-1-phenyl-1H-pyrazolo[3,4-d]pyridazin-6(7H)-yl)acetamide	分子量：417.4 密度：N/A 沸点：N/A 熔点：N/A	941972-75-4	C₂₂H₁₉N₅O₄
2-(4-methyl-7-oxo-1-phenyl-1H-pyrazolo[3,4-d]pyridazin-6(7H)-yl)-N-((tetrahydrofuran-2-yl)methyl)acetamide	2-(4-methyl-7-oxo-1-phenyl-1H-pyrazolo[3,4-d]pyridazin-6(7H)-yl)-N-((tetrahydrofuran-2-yl)methyl)acetamide	分子量：367.4 密度：N/A 沸点：N/A 熔点：N/A	942008-65-3	C₁₉H₂₁N₅O₃
2-(4-methyl-7-oxo-1-phenyl-1H-pyrazolo[3,4-d]pyridazin-6(7H)-yl)-N-phenethylacetamide	2-(4-methyl-7-oxo-1-phenyl-1H-pyrazolo[3,4-d]pyridazin-6(7H)-yl)-N-phenethylacetamide	分子量：387.4 密度：N/A 沸点：N/A 熔点：N/A	941884-22-6	C₂₂H₂₁N₅O₂
N-(3,4-dimethoxyphenethyl)-2-(4-methyl-7-oxo-1-phenyl-1H-pyrazolo[3,4-d]pyridazin-6(7H)-yl)acetamide	N-(3,4-dimethoxyphenethyl)-2-(4-methyl-7-oxo-1-phenyl-1H-pyrazolo[3,4-d]pyridazin-6(7H)-yl)acetamide	分子量：447.5 密度：N/A 沸点：N/A 熔点：N/A	941972-78-7	C₂₄H₂₅N₅O₄
2-(4-methyl-7-oxo-1-phenyl-1H-pyrazolo[3,4-d]pyridazin-6(7H)-yl)-N-(5-methylisoxazol-3-yl)acetamide	2-(4-methyl-7-oxo-1-phenyl-1H-pyrazolo[3,4-d]pyridazin-6(7H)-yl)-N-(5-methylisoxazol-3-yl)acetamide	分子量：364.4 密度：N/A 沸点：N/A 熔点：N/A	941915-01-1	C₁₈H₁₆N₆O₃
ethyl 2-(2-(4-methyl-7-oxo-1-phenyl-1H-pyrazolo[3,4-d]pyridazin-6(7H)-yl)acetamido)-4,5,6,7-tetrahydrobenzo[b]thiophene-3-carboxylate	ethyl 2-(2-(4-methyl-7-oxo-1-phenyl-1H-pyrazolo[3,4-d]pyridazin-6(7H)-yl)acetamido)-4,5,6,7-tetrahydrobenzo[b]thiophene-3-carboxylate	分子量：491.6 密度：N/A 沸点：N/A 熔点：N/A	955781-17-6	C₂₅H₂₅N₅O₄S
ethyl 2-(2-(4-methyl-7-oxo-1-phenyl-1H-pyrazolo[3,4-d]pyridazin-6(7H)-yl)propanamido)-5,6-dihydro-4H-cyclopenta[b]thiophene-3-carboxylate	ethyl 2-(2-(4-methyl-7-oxo-1-phenyl-1H-pyrazolo[3,4-d]pyridazin-6(7H)-yl)propanamido)-5,6-dihydro-4H-cyclopenta[b]thiophene-3-carboxylate	分子量：491.6 密度：N/A 沸点：N/A 熔点：N/A	955781-22-3	C₂₅H₂₅N₅O₄S
4-(2-(4-methyl-7-oxo-1-phenyl-1H-pyrazolo[3,4-d]pyridazin-6(7H)-yl)acetamido)benzamide	4-(2-(4-methyl-7-oxo-1-phenyl-1H-pyrazolo[3,4-d]pyridazin-6(7H)-yl)acetamido)benzamide	分子量：402.4 密度：N/A 沸点：N/A 熔点：N/A	942008-68-6	C₂₁H₁₈N₆O₃
N,N-diethyl-2-(4-methyl-7-oxo-1-phenyl-1H-pyrazolo[3,4-d]pyridazin-6(7H)-yl)acetamide	N,N-diethyl-2-(4-methyl-7-oxo-1-phenyl-1H-pyrazolo[3,4-d]pyridazin-6(7H)-yl)acetamide	分子量：339.4 密度：N/A 沸点：N/A 熔点：N/A	955781-32-5	C₁₈H₂₁N₅O₂
6-(3-fluorobenzyl)-4-methyl-1-phenyl-1H-pyrazolo[3,4-d]pyridazin-7(6H)-one	6-(3-fluorobenzyl)-4-methyl-1-phenyl-1H-pyrazolo[3,4-d]pyridazin-7(6H)-one	分子量：334.3 密度：N/A 沸点：N/A 熔点：N/A	941884-24-8	C₁₉H₁₅FN₄O
4-methyl-1-phenyl-6-(3-(trifluoromethyl)benzyl)-1H-pyrazolo[3,4-d]pyridazin-7(6H)-one	4-methyl-1-phenyl-6-(3-(trifluoromethyl)benzyl)-1H-pyrazolo[3,4-d]pyridazin-7(6H)-one	分子量：384.4 密度：N/A 沸点：N/A 熔点：N/A	941972-81-2	C₂₀H₁₅F₃N₄O
4-methyl-1-phenyl-6-(4-(trifluoromethyl)benzyl)-1H-pyrazolo[3,4-d]pyridazin-7(6H)-one	4-methyl-1-phenyl-6-(4-(trifluoromethyl)benzyl)-1H-pyrazolo[3,4-d]pyridazin-7(6H)-one	分子量：384.4 密度：N/A 沸点：N/A 熔点：N/A	942008-71-1	C₂₀H₁₅F₃N₄O
methyl 5-({4-methyl-7-oxo-1-phenyl-1H,6H,7H-pyrazolo[3,4-d]pyridazin-6-yl}methyl)furan-2-carboxylate	methyl 5-({4-methyl-7-oxo-1-phenyl-1H,6H,7H-pyrazolo[3,4-d]pyridazin-6-yl}methyl)furan-2-carboxylate	分子量：364.4 密度：N/A 沸点：N/A 熔点：N/A	946203-82-3	C₁₉H₁₆N₄O₄
6-(2-fluorobenzyl)-4-methyl-1-phenyl-1H-pyrazolo[3,4-d]pyridazin-7(6H)-one	6-(2-fluorobenzyl)-4-methyl-1-phenyl-1H-pyrazolo[3,4-d]pyridazin-7(6H)-one	分子量：334.3 密度：N/A 沸点：N/A 熔点：N/A	941884-26-0	C₁₉H₁₅FN₄O
4-methyl-1-phenyl-6-(pyridin-3-ylmethyl)-1H-pyrazolo[3,4-d]pyridazin-7(6H)-one	4-methyl-1-phenyl-6-(pyridin-3-ylmethyl)-1H-pyrazolo[3,4-d]pyridazin-7(6H)-one	分子量：317.3 密度：N/A 沸点：N/A 熔点：N/A	955781-52-9	C₁₈H₁₅N₅O
4-methyl-1-phenyl-6-(pyridin-2-ylmethyl)-1H-pyrazolo[3,4-d]pyridazin-7(6H)-one	4-methyl-1-phenyl-6-(pyridin-2-ylmethyl)-1H-pyrazolo[3,4-d]pyridazin-7(6H)-one	分子量：317.3 密度：N/A 沸点：N/A 熔点：N/A	941915-05-5	C₁₈H₁₅N₅O
methyl 2-(4-methyl-7-oxo-1-phenyl-1H-pyrazolo[3,4-d]pyridazin-6(7H)-yl)acetate	methyl 2-(4-methyl-7-oxo-1-phenyl-1H-pyrazolo[3,4-d]pyridazin-6(7H)-yl)acetate	分子量：298.30 密度：N/A 沸点：N/A 熔点：N/A	955781-55-2	C₁₅H₁₄N₄O₃
2-(4-methyl-7-oxo-1-phenyl-1H-pyrazolo[3,4-d]pyridazin-6(7H)-yl)acetonitrile	2-(4-methyl-7-oxo-1-phenyl-1H-pyrazolo[3,4-d]pyridazin-6(7H)-yl)acetonitrile	分子量：265.27 密度：N/A 沸点：N/A 熔点：N/A	955781-67-6	C₁₄H₁₁N₅O
N-(tert-butyl)-2-(4-methyl-7-oxo-1-phenyl-1H-pyrazolo[3,4-d]pyridazin-6(7H)-yl)acetamide	N-(tert-butyl)-2-(4-methyl-7-oxo-1-phenyl-1H-pyrazolo[3,4-d]pyridazin-6(7H)-yl)acetamide	分子量：339.4 密度：N/A 沸点：N/A 熔点：N/A	955781-76-7	C₁₈H₂₁N₅O₂
N-(2-methoxyethyl)-2-(4-methyl-7-oxo-1-phenyl-1H-pyrazolo[3,4-d]pyridazin-6(7H)-yl)acetamide	N-(2-methoxyethyl)-2-(4-methyl-7-oxo-1-phenyl-1H-pyrazolo[3,4-d]pyridazin-6(7H)-yl)acetamide	分子量：341.4 密度：N/A 沸点：N/A 熔点：N/A	942008-74-4	C₁₇H₁₉N₅O₃
6-(3,5-dimethoxybenzyl)-4-methyl-1-phenyl-1H-pyrazolo[3,4-d]pyridazin-7(6H)-one	6-(3,5-dimethoxybenzyl)-4-methyl-1-phenyl-1H-pyrazolo[3,4-d]pyridazin-7(6H)-one	分子量：376.4 密度：N/A 沸点：N/A 熔点：N/A	941915-07-7	C₂₁H₂₀N₄O₃
6-(2-chloro-6-fluorobenzyl)-4-methyl-1-phenyl-1H-pyrazolo[3,4-d]pyridazin-7(6H)-one	6-(2-chloro-6-fluorobenzyl)-4-methyl-1-phenyl-1H-pyrazolo[3,4-d]pyridazin-7(6H)-one	分子量：368.8 密度：N/A 沸点：N/A 熔点：N/A	942008-77-7	C₁₉H₁₄ClFN₄O
1-(3-chlorophenyl)-4-methyl-6-(2-(4-methylpiperidin-1-yl)-2-oxoethyl)-1H-pyrazolo[3,4-d]pyridazin-7(6H)-one	1-(3-chlorophenyl)-4-methyl-6-(2-(4-methylpiperidin-1-yl)-2-oxoethyl)-1H-pyrazolo[3,4-d]pyridazin-7(6H)-one	分子量：399.9 密度：N/A 沸点：N/A 熔点：N/A	955800-14-3	C₂₀H₂₂ClN₅O₂
1-(3-chlorophenyl)-4-methyl-6-(2-oxo-2-(4-phenylpiperazin-1-yl)ethyl)-1H-pyrazolo[3,4-d]pyridazin-7(6H)-one	1-(3-chlorophenyl)-4-methyl-6-(2-oxo-2-(4-phenylpiperazin-1-yl)ethyl)-1H-pyrazolo[3,4-d]pyridazin-7(6H)-one	分子量：462.9 密度：N/A 沸点：N/A 熔点：N/A	955800-18-7	C₂₄H₂₃ClN₆O₂
1-(3-chlorophenyl)-6-(2-(3,4-dihydroquinolin-1(2H)-yl)-2-oxoethyl)-4-methyl-1H-pyrazolo[3,4-d]pyridazin-7(6H)-one	1-(3-chlorophenyl)-6-(2-(3,4-dihydroquinolin-1(2H)-yl)-2-oxoethyl)-4-methyl-1H-pyrazolo[3,4-d]pyridazin-7(6H)-one	分子量：433.9 密度：N/A 沸点：N/A 熔点：N/A	955800-29-0	C₂₃H₂₀ClN₅O₂
1-(3-chlorophenyl)-6-(2-(indolin-1-yl)-2-oxoethyl)-4-methyl-1H-pyrazolo[3,4-d]pyridazin-7(6H)-one	1-(3-chlorophenyl)-6-(2-(indolin-1-yl)-2-oxoethyl)-4-methyl-1H-pyrazolo[3,4-d]pyridazin-7(6H)-one	分子量：419.9 密度：N/A 沸点：N/A 熔点：N/A	955800-32-5	C₂₂H₁₈ClN₅O₂
2-(1-(3-chlorophenyl)-4-methyl-7-oxo-1H-pyrazolo[3,4-d]pyridazin-6(7H)-yl)acetamide	2-(1-(3-chlorophenyl)-4-methyl-7-oxo-1H-pyrazolo[3,4-d]pyridazin-6(7H)-yl)acetamide	分子量：317.73 密度：N/A 沸点：N/A 熔点：N/A	955800-35-8	C₁₄H₁₂ClN₅O₂
2-(1-(3-chlorophenyl)-4-methyl-7-oxo-1H-pyrazolo[3,4-d]pyridazin-6(7H)-yl)-N-(2-fluorophenyl)acetamide	2-(1-(3-chlorophenyl)-4-methyl-7-oxo-1H-pyrazolo[3,4-d]pyridazin-6(7H)-yl)-N-(2-fluorophenyl)acetamide	分子量：411.8 密度：N/A 沸点：N/A 熔点：N/A	941884-30-6	C₂₀H₁₅ClFN₅O₂
2-(1-(3-chlorophenyl)-4-methyl-7-oxo-1H-pyrazolo[3,4-d]pyridazin-6(7H)-yl)-N-(3-fluorophenyl)acetamide	2-(1-(3-chlorophenyl)-4-methyl-7-oxo-1H-pyrazolo[3,4-d]pyridazin-6(7H)-yl)-N-(3-fluorophenyl)acetamide	分子量：411.8 密度：N/A 沸点：N/A 熔点：N/A	941972-90-3	C₂₀H₁₅ClFN₅O₂
2-(1-(3-chlorophenyl)-4-methyl-7-oxo-1H-pyrazolo[3,4-d]pyridazin-6(7H)-yl)-N-(4-fluorophenyl)acetamide	2-(1-(3-chlorophenyl)-4-methyl-7-oxo-1H-pyrazolo[3,4-d]pyridazin-6(7H)-yl)-N-(4-fluorophenyl)acetamide	分子量：411.8 密度：N/A 沸点：N/A 熔点：N/A	941915-09-9	C₂₀H₁₅ClFN₅O₂
2-Benzofurancarboxamide, N-[5-[(2-fluorophenyl)methyl]-2-thiazolyl]-3-[(2-methylphenoxy)methyl]-	2-Benzofurancarboxamide, N-[5-[(2-fluorophenyl)methyl]-2-thiazolyl]-3-[(2-methylphenoxy)methyl]-	分子量：472.5 密度：N/A 沸点：N/A 熔点：N/A	890597-39-4	C₂₇H₂₁FN₂O₃S
N-(benzo[d][1,3]dioxol-5-yl)-2-(1-(3-chlorophenyl)-4-methyl-7-oxo-1H-pyrazolo[3,4-d]pyridazin-6(7H)-yl)acetamide	N-(benzo[d][1,3]dioxol-5-yl)-2-(1-(3-chlorophenyl)-4-methyl-7-oxo-1H-pyrazolo[3,4-d]pyridazin-6(7H)-yl)acetamide	分子量：437.8 密度：N/A 沸点：N/A 熔点：N/A	942008-80-2	C₂₁H₁₆ClN₅O₄
Dimethyl 2-(7-methyl-1-oxoisochroman-3-carboxamido)terephthalate	Dimethyl 2-(7-methyl-1-oxoisochroman-3-carboxamido)terephthalate	分子量：397.4 密度：N/A 沸点：N/A 熔点：N/A	890600-51-8	C₂₁H₁₉NO₇
7-methyl-1-oxo-N-(4-sulfamoylphenyl)-3,4-dihydro-1H-isochromene-3-carboxamide	7-methyl-1-oxo-N-(4-sulfamoylphenyl)-3,4-dihydro-1H-isochromene-3-carboxamide	分子量：360.4 密度：N/A 沸点：N/A 熔点：N/A	879569-11-6	C₁₇H₁₆N₂O₅S
(Z)-2-(5-((5-(4-methoxyphenyl)furan-2-yl)methylene)-4-oxo-2-thioxothiazolidin-3-yl)propanoic acid	(Z)-2-(5-((5-(4-methoxyphenyl)furan-2-yl)methylene)-4-oxo-2-thioxothiazolidin-3-yl)propanoic acid	分子量：389.4 密度：N/A 沸点：N/A 熔点：N/A	883469-82-7	C₁₈H₁₅NO₅S₂
(Z)-2-(5-((5-(2-chlorophenyl)furan-2-yl)methylene)-4-oxo-2-thioxothiazolidin-3-yl)propanoic acid	(Z)-2-(5-((5-(2-chlorophenyl)furan-2-yl)methylene)-4-oxo-2-thioxothiazolidin-3-yl)propanoic acid	分子量：393.9 密度：N/A 沸点：N/A 熔点：N/A	883474-70-2	C₁₇H₁₂ClNO₄S₂
(Z)-2-(5-((5-(4-chlorophenyl)furan-2-yl)methylene)-4-oxo-2-thioxothiazolidin-3-yl)propanoic acid	(Z)-2-(5-((5-(4-chlorophenyl)furan-2-yl)methylene)-4-oxo-2-thioxothiazolidin-3-yl)propanoic acid	分子量：393.9 密度：N/A 沸点：N/A 熔点：N/A	883474-96-2	C₁₇H₁₂ClNO₄S₂
(Z)-4-(4-oxo-2-thioxo-5-((5-(2-(trifluoromethyl)phenyl)furan-2-yl)methylene)thiazolidin-3-yl)butanoic acid	(Z)-4-(4-oxo-2-thioxo-5-((5-(2-(trifluoromethyl)phenyl)furan-2-yl)methylene)thiazolidin-3-yl)butanoic acid	分子量：441.4 密度：N/A 沸点：N/A 熔点：N/A	676643-69-9	C₁₉H₁₄F₃NO₄S₂
2-(1-(3-chlorophenyl)-4-methyl-7-oxo-1H-pyrazolo[3,4-d]pyridazin-6(7H)-yl)-N-(4-fluorobenzyl)acetamide	2-(1-(3-chlorophenyl)-4-methyl-7-oxo-1H-pyrazolo[3,4-d]pyridazin-6(7H)-yl)-N-(4-fluorobenzyl)acetamide	分子量：425.8 密度：N/A 沸点：N/A 熔点：N/A	941884-32-8	C₂₁H₁₇ClFN₅O₂
2-(1-(3-chlorophenyl)-4-methyl-7-oxo-1H-pyrazolo[3,4-d]pyridazin-6(7H)-yl)-N-(furan-2-ylmethyl)acetamide	2-(1-(3-chlorophenyl)-4-methyl-7-oxo-1H-pyrazolo[3,4-d]pyridazin-6(7H)-yl)-N-(furan-2-ylmethyl)acetamide	分子量：397.8 密度：N/A 沸点：N/A 熔点：N/A	941972-93-6	C₁₉H₁₆ClN₅O₃
2-(1-(3-chlorophenyl)-4-methyl-7-oxo-1H-pyrazolo[3,4-d]pyridazin-6(7H)-yl)-N-((tetrahydrofuran-2-yl)methyl)acetamide	2-(1-(3-chlorophenyl)-4-methyl-7-oxo-1H-pyrazolo[3,4-d]pyridazin-6(7H)-yl)-N-((tetrahydrofuran-2-yl)methyl)acetamide	分子量：401.8 密度：N/A 沸点：N/A 熔点：N/A	941915-11-3	C₁₉H₂₀ClN₅O₃
2-(1-(3-chlorophenyl)-4-methyl-7-oxo-1H-pyrazolo[3,4-d]pyridazin-6(7H)-yl)-N-(3,4-dimethoxyphenethyl)acetamide	2-(1-(3-chlorophenyl)-4-methyl-7-oxo-1H-pyrazolo[3,4-d]pyridazin-6(7H)-yl)-N-(3,4-dimethoxyphenethyl)acetamide	分子量：481.9 密度：N/A 沸点：N/A 熔点：N/A	955801-70-4	C₂₄H₂₄ClN₅O₄
2-(1-(3-chlorophenyl)-4-methyl-7-oxo-1H-pyrazolo[3,4-d]pyridazin-6(7H)-yl)-N-(5-methylisoxazol-3-yl)acetamide	2-(1-(3-chlorophenyl)-4-methyl-7-oxo-1H-pyrazolo[3,4-d]pyridazin-6(7H)-yl)-N-(5-methylisoxazol-3-yl)acetamide	分子量：398.8 密度：N/A 沸点：N/A 熔点：N/A	942008-83-5	C₁₈H₁₅ClN₆O₃
N-[2-(ethylsulfanyl)phenyl]-2,3-dihydro-1,4-benzodioxine-2-carboxamide	N-[2-(ethylsulfanyl)phenyl]-2,3-dihydro-1,4-benzodioxine-2-carboxamide	分子量：315.4 密度：N/A 沸点：N/A 熔点：N/A	890601-49-7	C₁₇H₁₇NO₃S
N-(4-iodo-2-methylphenyl)-2,3-dihydro-1,4-benzodioxine-2-carboxamide	N-(4-iodo-2-methylphenyl)-2,3-dihydro-1,4-benzodioxine-2-carboxamide	分子量：395.19 密度：N/A 沸点：N/A 熔点：N/A	890601-53-3	C₁₆H₁₄INO₃
1-(3-chlorophenyl)-6-(3-fluorobenzyl)-4-methyl-1H-pyrazolo[3,4-d]pyridazin-7(6H)-one	1-(3-chlorophenyl)-6-(3-fluorobenzyl)-4-methyl-1H-pyrazolo[3,4-d]pyridazin-7(6H)-one	分子量：368.8 密度：N/A 沸点：N/A 熔点：N/A	941884-34-0	C₁₉H₁₄ClFN₄O
1-(3-chlorophenyl)-6-(4-fluorobenzyl)-4-methyl-1H-pyrazolo[3,4-d]pyridazin-7(6H)-one	1-(3-chlorophenyl)-6-(4-fluorobenzyl)-4-methyl-1H-pyrazolo[3,4-d]pyridazin-7(6H)-one	分子量：368.8 密度：N/A 沸点：N/A 熔点：N/A	941972-96-9	C₁₉H₁₄ClFN₄O