CAS Number

A CAS number, also known as a CAS registry number or CAS log number, is a unique identification number assigned by the Chemicals Service (CAS), a division of the American Chemical Society, to chemical substances. It is an important tool for retrieving information on chemicals that have multiple names. Chemical substances can be described in many different ways, such as by molecular formula, structural formula, systematic name, generic name, or trade name. However, the CAS Registry Number is unique to a single substance.

CAS 2227737-38-2|rac-tert-butyl (3R,4S)-3-(but-3-yn-1-yl)-4-hydroxypyrrolidine-1-carboxylate CAS 2104600-40-8|4-[(Cyclopent-3-en-1-yl)methyl]oxolan-3-ol CAS 2171901-29-2|1-[2-Hydroxy-4-(methoxymethyl)cyclopentyl]ethan-1-one CAS 2154149-24-1|4-(3-Methoxypropyl)oxolan-3-ol CAS 2171645-18-2|1-(3-Aminooxan-3-yl)-3,5-dimethylcyclohexan-1-ol CAS 2171768-27-5|Tert-butyl 3-amino-3-(3-hydroxy-8,8-dioxo-8lambda6-thiabicyclo[3.2.1]octan-3-yl)pyr CAS 2171591-16-3|Tert-butyl 3-amino-3-(1-hydroxy-4,4-dimethylcycloheptyl)pyrrolidine-1-carboxylate CAS 2171591-09-4|Tert-butyl 3-amino-3-[1-hydroxy-3-(propan-2-yl)cyclohexyl]pyrrolidine-1-carboxylate CAS 2171642-88-7|Tert-butyl 3-amino-3-(3-hydroxy-1-methylpyrrolidin-3-yl)pyrrolidine-1-carboxylate CAS 2171631-24-4|Tert-butyl 3-amino-3-[1-hydroxy-4-(propan-2-yl)cyclohexyl]pyrrolidine-1-carboxylate CAS 2172072-69-2|2-{1-[3-(dimethylamino)propyl]-5-(oxan-4-yl)-1H-1,2,3-triazol-4-yl}acetonitrile CAS 2172059-64-0|2-[1-(2-hydroxyethyl)-5-(oxan-4-yl)-1H-1,2,3-triazol-4-yl]acetonitrile CAS 2172539-30-7|2-[5-(oxan-4-yl)-1-(oxolan-2-ylmethyl)-1H-1,2,3-triazol-4-yl]acetonitrile CAS 2172580-01-5|2-[5-(oxan-4-yl)-1-(propan-2-yl)-1H-1,2,3-triazol-4-yl]acetonitrile CAS 2172059-60-6|2-[5-(2-methoxyethyl)-1-(1,1,1-trifluoropropan-2-yl)-1H-1,2,3-triazol-4-yl]acetonit CAS 2172539-18-1|2-[1-(2,2-difluoro-3-hydroxypropyl)-5-(2-methoxyethyl)-1H-1,2,3-triazol-4-yl]aceton CAS 2172497-69-5|2-[1-(2-cyclopropylethyl)-5-(2-methoxyethyl)-1H-1,2,3-triazol-4-yl]acetonitrile CAS 2171910-23-7|2-[1-(2-cyclobutylethyl)-5-(2-methoxyethyl)-1H-1,2,3-triazol-4-yl]acetonitrile CAS 2172059-55-9|2-[1-(2,2-difluoroethyl)-5-(2-methoxyethyl)-1H-1,2,3-triazol-4-yl]acetonitrile CAS 2172000-00-7|2-[1-(3-hydroxybutyl)-5-(2-methoxyethyl)-1H-1,2,3-triazol-4-yl]acetonitrile CAS 2172037-69-1|2-[1-(2-ethoxyethyl)-5-(2-methoxyethyl)-1H-1,2,3-triazol-4-yl]acetonitrile CAS 2172059-48-0|2-[1-(1-methoxybutan-2-yl)-5-(2-methoxyethyl)-1H-1,2,3-triazol-4-yl]acetonitrile CAS 2172092-49-6|2-{1-[2-(2-hydroxyethoxy)ethyl]-5-(2-methoxyethyl)-1H-1,2,3-triazol-4-yl}acetonitri CAS 2172538-97-3|2-[5-(2-methoxyethyl)-1-propyl-1H-1,2,3-triazol-4-yl]acetonitrile CAS 2172072-38-5|2-[1-(3-ethoxypropyl)-5-(2-methoxyethyl)-1H-1,2,3-triazol-4-yl]acetonitrile CAS 2172497-55-9|2-[5-(2-methoxyethyl)-1-(pentan-3-yl)-1H-1,2,3-triazol-4-yl]acetonitrile CAS 2172459-59-3|2-[1-cyclopentyl-5-(2-methoxyethyl)-1H-1,2,3-triazol-4-yl]acetonitrile CAS 2171631-16-4|4-(1-Amino-3-methylbutyl)-2,2,6,6-tetramethylpiperidin-4-ol CAS 2172588-13-3|2-[1-cyclopropyl-5-(2-methoxyethyl)-1H-1,2,3-triazol-4-yl]acetonitrile CAS 2172037-61-3|3-Amino-2,5-dimethylheptan-2-ol CAS 2172072-11-4|1-(2-methylpropyl)-5-(trifluoromethyl)-1H-1,2,3-triazole-4-carbothioamide CAS 2171908-17-9|1-amino-2-methyl-1-(1-methyl-1H-1,2,3,4-tetrazol-5-yl)propan-2-ol CAS 2171901-11-2|1-cyclopropyl-5-(trifluoromethyl)-1H-1,2,3-triazole-4-carbothioamide CAS 2172092-37-2|1-amino-1-(1,2-dimethyl-1H-imidazol-4-yl)-2-methylpropan-2-ol CAS 2171919-51-8|1-[2-(dimethylamino)ethyl]-5-(trifluoromethyl)-1H-1,2,3-triazole-4-carbothioamide CAS 2172587-89-0|1-Amino-2-methyl-1-(1,2-thiazol-4-yl)propan-2-ol CAS 2172059-21-9|5-(difluoromethyl)-1-(2-methoxyethyl)-1H-1,2,3-triazole-4-carbothioamide CAS 2172459-49-1|5-(trifluoromethyl)-1-(1,1,1-trifluoropropan-2-yl)-1H-1,2,3-triazole-4-carbothioami CAS 2172529-27-8|1-(2-cyclopropyl-2-hydroxyethyl)-5-ethyl-1H-1,2,3-triazole-4-carbaldehyde CAS 2172037-33-9|5-ethyl-1-(2-methylcyclopropyl)-1H-1,2,3-triazole-4-carbaldehyde CAS 2227641-96-3|4-amino-1-ethyl-5-(1-ethyl-1H-pyrazol-4-yl)pyrrolidin-2-one CAS 2227860-23-1|4-amino-1-ethyl-5-(1-propyl-1H-pyrrol-2-yl)pyrrolidin-2-one CAS 2172092-07-6|5-(difluoromethyl)-1-(propan-2-yl)-1H-1,2,3-triazole-4-carbothioamide CAS 2227754-22-3|4-amino-1-ethyl-5-(1-methyl-1H-imidazol-5-yl)pyrrolidin-2-one CAS 2171999-71-4|5-ethyl-1-(4-hydroxypentyl)-1H-1,2,3-triazole-4-carbaldehyde CAS 2227860-17-3|3-(3-Amino-1-ethyl-5-oxopyrrolidin-2-yl)benzoic acid CAS 2227802-99-3|(4S,5S)-4-amino-1-ethyl-5-(trifluoromethyl)pyrrolidin-2-one CAS 2227722-74-7|4-amino-1-ethyl-5-(1-methyl-1H-pyrazol-4-yl)pyrrolidin-2-one CAS 2227754-09-6|4-Amino-1-ethyl-5-(2-methyl-1,3-thiazol-4-yl)pyrrolidin-2-one CAS 2172071-74-6|1-(3-methylbutyl)-5-(trifluoromethyl)-1H-1,2,3-triazole-4-carboxamide CAS 2172050-71-2|1-butyl-5-(trifluoromethyl)-1H-1,2,3-triazole-4-carboxamide CAS 2171907-62-1|benzyl N-({2-[(propan-2-yl)sulfamoyl]thiophen-3-yl}methyl)carbamate CAS 2172458-40-9|benzyl N-{[2-(ethylsulfamoyl)thiophen-3-yl]methyl}carbamate CAS 2172091-42-6|4-Bromo-3,5-difluorobenzene-1-sulfonyl fluoride CAS 2172578-60-6|1-(cyclopropylmethyl)-1H-pyrazole-5-sulfonyl fluoride CAS 2227875-12-7|rac-(1R,2R)-2-(4-bromo-1,3-thiazol-5-yl)cyclopentan-1-ol CAS 2227641-70-3|rac-(1R,2S)-2-(4-methylcyclohexyl)cyclopentan-1-ol CAS 2172057-91-7|Tert-butyl 3-hydroxy-4-[(4-methylthiophen-3-yl)methyl]pyrrolidine-1-carboxylate CAS 2227782-73-0|rac-(1R,2S)-2-[(thiophen-3-yl)methyl]cyclopentan-1-ol CAS 2172070-83-4|Tert-butyl 8,8,10,10-tetramethyl-4-oxa-1,9-diazaspiro[5.5]undecane-9-carboxylate CAS 2172578-05-9|Tert-butyl 8-azaspiro[bicyclo[3.3.1]nonane-2,2'-[1,3]oxazolidine]-8-carboxylate CAS 2172070-76-5|8lambda6-Thiaspiro[bicyclo[3.2.1]octane-3,2'-[1,3]oxazolidine]-8,8-dione CAS 2171652-87-0|Tert-butyl 8-azaspiro[bicyclo[3.3.1]nonane-2,3'-morpholine]-8-carboxylate CAS 2172090-79-6|4-[4-(aminomethyl)-5-(trifluoromethyl)-1H-1,2,3-triazol-1-yl]butan-2-ol CAS 2172594-54-4|[1-(3-methylbutan-2-yl)-5-(trifluoromethyl)-1H-1,2,3-triazol-4-yl]methanamine CAS 2172594-46-4|{1-[2-(dimethylamino)ethyl]-5-(trifluoromethyl)-1H-1,2,3-triazol-4-yl}methanamine CAS 2172496-78-3|2-[4-(aminomethyl)-5-(trifluoromethyl)-1H-1,2,3-triazol-1-yl]butan-1-ol CAS 2172090-61-6|4-[4-(aminomethyl)-5-(1-methoxyethyl)-1H-1,2,3-triazol-1-yl]pentan-1-ol CAS 2171919-11-0|3-(Hydroxymethyl)-3-(3-hydroxyoxan-3-yl)-1lambda6-thiane-1,1-dione CAS 2171797-47-8|5-(3,3-Dimethylpentyl)-1,8-dioxa-4-azaspiro[5.5]undecane CAS 2171616-84-3|5-(Cyclohexylmethyl)-1,8-dioxa-4-azaspiro[5.5]undecane CAS 2171652-67-6|5-(1-ethyl-1H-imidazol-4-yl)-1,8-dioxa-4-azaspiro[5.5]undecane CAS 2171773-22-9|5-(Ethoxymethyl)-1,8-dioxa-4-azaspiro[5.5]undecane CAS 2171781-89-6|5-(Oxolan-3-ylmethyl)-1,8-dioxa-4-azaspiro[5.5]undecane CAS 2171773-13-8|5-(2,2-Dimethylbutyl)-1,8-dioxa-4-azaspiro[5.5]undecane CAS 2171652-57-4|5-(2,4-Dimethylpentyl)-1,8-dioxa-4-azaspiro[5.5]undecane CAS 2171797-22-9|5-[(2,2-Difluorocyclopropyl)methyl]-1,8-dioxa-4-azaspiro[5.5]undecane CAS 2171900-77-7|1-{[1-(hydroxymethyl)cyclopropyl]methyl}-5-propyl-1H-1,2,3-triazole-4-carboxamide CAS 2172455-79-5|1-(1-hydroxypropan-2-yl)-5-propyl-1H-1,2,3-triazole-4-carboxamide CAS 2172594-09-9|1-(3-methoxy-2-methylpropyl)-5-propyl-1H-1,2,3-triazole-4-carboxamide CAS 2172583-82-1|1-[2-(2-hydroxyethoxy)ethyl]-5-propyl-1H-1,2,3-triazole-4-carboxamide CAS 2171918-98-0|1-(3-ethoxypropyl)-5-propyl-1H-1,2,3-triazole-4-carboxamide CAS 2172594-05-5|1-cyclopentyl-5-propyl-1H-1,2,3-triazole-4-carboxamide CAS 2172544-37-3|6,8-Dichloro-3,5-dimethylimidazo[1,2-a]pyridine CAS 2172583-70-7|4-(dimethyl-4H-1,2,4-triazol-3-yl)pyrrolidin-3-ol CAS 74629-80-4|2-(2-Chloroprop-2-en-1-yl)-1,2-dimethylcyclopentan-1-ol CAS 2227764-35-2|rac-tert-butyl (3R,4R)-3-hydroxy-4-(1-methyl-1H-pyrazol-3-yl)pyrrolidine-1-carboxyl CAS 2172593-83-6|1-[3-amino-3-(1-tert-butyl-1H-pyrazol-4-yl)pyrrolidin-1-yl]-2,2,2-trifluoroethan-1- CAS 2172583-55-8|1-[3-Amino-3-(thiophen-3-yl)pyrrolidin-1-yl]-2,2,2-trifluoroethan-1-one CAS 2172069-91-7|1-[3-Amino-3-(1,2-thiazol-5-yl)pyrrolidin-1-yl]-2,2,2-trifluoroethan-1-one CAS 2172593-80-3|1-[3-Amino-3-(1,2-thiazol-3-yl)pyrrolidin-1-yl]-2,2,2-trifluoroethan-1-one CAS 2137447-56-2|8-(Propan-2-yl)-1-oxa-8-azaspiro[4.5]decan-4-ol CAS 2172069-88-2|1-{3-Amino-3-[3-(propan-2-yl)phenyl]pyrrolidin-1-yl}-2,2,2-trifluoroethan-1-one CAS 2172090-40-1|1-{3-amino-3-[1-(propan-2-yl)-1H-1,2,3-triazol-5-yl]pyrrolidin-1-yl}-2,2,2-trifluor CAS 2172454-83-8|1-[1-(Hydroxymethyl)-4,4-dimethylcyclohexyl]cyclobutan-1-ol CAS 2172583-36-5|4-[1-(Hydroxymethyl)-4,4-dimethylcyclohexyl]piperidin-4-ol CAS 2172544-32-8|2-[1-(Hydroxymethyl)-4,4-dimethylcyclohexyl]propan-2-ol CAS 2172593-45-0|1-[1-(Hydroxymethyl)-3,5-dimethylcyclohexyl]-3,3-dimethylcyclobutan-1-ol CAS 2172069-62-2|3-[1-(Hydroxymethyl)-3,5-dimethylcyclohexyl]oxetan-3-ol CAS 2172454-73-6|3-[2-(Hydroxymethyl)bicyclo[2.2.2]octan-2-yl]thian-3-ol
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