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 2248312-34-5|1,3-dioxo-2,3-dihydro-1H-isoindol-2-yl 2-{bicyclo[4.1.0]heptan-3-yl}acetate CAS 2229473-58-7|1-[2-(Morpholin-4-yl)phenyl]prop-2-en-1-one CAS 56059-34-8|4-Chloro-2-[(4-chlorophenyl)sulfonyl]phenol CAS 2228522-73-2|1-[5-(Methoxymethyl)furan-2-yl]prop-2-en-1-one CAS 2228976-14-3|3-[2-(Pyrrolidin-1-yl)pyridin-3-yl]but-3-en-1-amine CAS 2228815-75-4|tert-butyl N-(3-ethoxy-2-methyl-1-oxobutan-2-yl)carbamate CAS 2248343-40-8|1,3-dioxo-2,3-dihydro-1H-isoindol-2-yl 4-(trifluoromethoxy)benzoate CAS 2229226-27-9|tert-butyl N-[1-(2-chloro-6-fluorophenyl)-2-oxoethyl]-N-methylcarbamate CAS 2229649-94-7|1-(4-Nitrobut-3-en-2-yl)-4-(trifluoromethyl)benzene CAS 2137795-83-4|[5-(1,3-Thiazol-4-yl)-1,2-oxazol-3-yl]methanethiol CAS 2137620-65-4|[5-(Oxolan-2-yl)-1,2-oxazol-3-yl]methanethiol CAS 2138243-19-1|{4H,6H,7H-thiopyrano[3,4-d][1,2]oxazol-3-yl}methanethiol CAS 2229156-36-7|2-(4-Methyl-1,3-thiazol-5-yl)prop-2-en-1-amine CAS 2227680-25-1|2-[(2R)-oxiran-2-yl]imidazo[1,2-a]pyridine CAS 2680536-26-7|Methyl 3-formyl-5-isopropylbenzoate CAS 2137981-28-1|{8-bromo-4H-chromeno[3,4-d][1,2]oxazol-3-yl}methanethiol CAS 2229247-62-3|1-amino-3-(1-ethyl-1H-pyrazol-5-yl)propan-2-ol CAS 2138024-61-8|[5-(2,3-Dichlorophenyl)-1,2-oxazol-3-yl]methanethiol CAS 2137831-42-4|Tert-butyl 2-(3,8-dimethyl-1,2,3,4-tetrahydroquinolin-4-yl)acetate CAS 2228492-62-2|2-(4-Bromo-2-methoxyphenyl)-1-methylpiperazine CAS 2137902-78-2|5-(5-Bromo-2-fluorophenyl)-1,2,3,6-tetrahydropyridin-3-amine CAS 2751615-63-9|3,3-Difluoro-2-methoxycyclobut-1-ene-1-carbonitrile CAS 2138028-85-8|tert-butyl N-[5-(prop-2-enoyl)-1,3-thiazol-2-yl]carbamate CAS 2171996-26-0|2-{4-[3-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)propanamido]oxan-3-yl}acetic aci CAS 2227923-11-5|rac-(1R,2S)-2-[2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)butanamido]cyclohexane- CAS 2227928-54-1|rac-(1R,2S)-2-[2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)propanamido]cyclohexane CAS 2171850-85-2|3-[4-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-3,3-dimethylbutanamido]-1-methyl-1 CAS 2138174-82-8|Ethyl[(4-iodo-2,5-dimethylphenyl)methyl](2-methylpropyl)amine CAS 2171440-15-4|1-[(2S)-2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-3-methoxypropanoyl]-2-methylp CAS 2171450-03-4|4-[(2S)-2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-3-methoxypropanamido]-3-metho CAS 2648932-50-5|(2S)-2-[(2R)-2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)pentanamido]-3-methylpent CAS 2172219-90-6|2-{4-[3-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-2-methylpropanoyl]thiomorpholin CAS 2137680-22-7|1-[(4-Iodo-2,5-dimethylphenyl)methyl]-4-(2-methylpropyl)piperazine CAS 2172219-47-3|3-{[5-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-1,2-oxazol-3-yl]formamido}propano CAS 2171870-76-9|5-{[2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)cyclopentyl]formamido}hexanoic aci CAS 2171339-65-2|(3R)-3-{2-[({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)methyl]-3-methylbutanamido}he CAS 2171850-45-4|2-{2-[({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)methyl]-3,3,3-trifluoro-N-methylpr CAS 2171599-28-1|4-[2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)pent-4-ynamido]-3-hydroxy-3-methylb CAS 2171940-06-8|2-{1-[1-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)cyclopropaneamido]cyclopentyl}ac CAS 2171737-99-6|2-cyclopropyl-2-{[5-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)pyridin-2-yl]formami CAS 2171235-19-9|(2S,3S)-2-[(3R)-3-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)hexanamido]-3-methylpe CAS 2171197-97-8|(2S,3R)-2-[(3R)-3-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)hexanamido]-3-hydroxyb CAS 2749769-66-0|N,2-dimethyl-N-[(piperidin-4-yl)methyl]pyrimidin-5-amine CAS 2172222-90-9|3-{N-cyclopropyl-2-[2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)acetamido]acetamid CAS 2171869-92-2|2-[3-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)butanamido]cyclohexane-1-carboxylic CAS 2171648-52-3|3-[2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-2-phenylacetamido]butanoic acid CAS 2172479-48-8|3-[N-ethyl-3-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-2-(propan-2-yl)butanamido] CAS 2105716-53-6|2-[2-(Pyrrolidin-1-yl)pyridin-3-yl]acetonitrile CAS 2137676-31-2|5-Bromo-6-ethyl-3-(2-methoxyethyl)-3,4-dihydropyrimidin-4-one CAS 2138168-24-6|2-(2,2-Dichlorocyclopropyl)ethane-1-sulfinamide CAS 2792186-67-3|[2-(Azepan-1-yl)ethyl](propan-2-yl)aminedihydrochloride CAS 2137722-05-3|1-(2-formylphenyl)-3-methyl-1H-pyrazole-4-carboxylic acid CAS 2138429-21-5|1-(8-formylquinolin-5-yl)-3-methyl-1H-pyrazole-4-carboxylic acid CAS 2137649-80-8|1-(3-fluoro-4-formylpyridin-2-yl)-1H-pyrazole-3-carboxylic acid CAS 2137056-64-3|2-chloro-N-[(3R,4S)-4-hydroxy-2-oxooxolan-3-yl]acetamide CAS 1874012-49-3|tert-butyl N-[2-amino-1-(5-fluoro-2-methoxyphenyl)ethyl]carbamate CAS 2680782-24-3|1-Oxa-7-azaspiro[4.5]decan-9-one CAS 2137825-46-6|3-(Bromomethyl)-5-(2,4-dimethylpentan-3-yl)pyridine CAS 2138170-91-7|2-methyl-5-(1-methyl-1H-imidazol-2-yl)-3-(trifluoromethyl)aniline CAS 2137861-10-8|5-(5-Fluoro-2-methylphenyl)-1,2,3,6-tetrahydropyridin-3-ol CAS 2138208-04-3|6-bromo-4,4-dimethyl-1,1-dioxo-3,4-dihydro-2H-1lambda6-benzothiopyran-2-carboxylic CAS 2172588-57-5|2,2-dimethyl-3-(1-methyl-1H-pyrazol-3-yl)morpholine CAS 2137781-90-7|rac-(1R,2S)-1-methyl-2-(2,2,2-trifluoroethyl)cyclopropane-1-carboxylic acid CAS 2757961-27-4|tert-butyl(3R)-3-(2-diazoacetyl)pyrrolidine-1-carboxylate CAS 138173-75-8|Cyclobutanone, 2,3-dimethyl-3-phenyl-, cis- CAS 2167839-94-1|1-(Aminomethyl)-7,7-dimethyl-2-oxaspiro[4.4]nonan-3-one CAS 2116086-48-5|3-[4-(Methoxymethyl)phenyl]propanenitrile CAS 2228735-60-0|2-Methyl-5-(2-nitroethyl)-2,3-dihydro-1-benzofuran CAS 2229354-51-0|2-(1-ethyl-1H-imidazol-5-yl)-2-methylpropan-1-ol CAS 2228004-43-9|(3S)-3-{bicyclo[2.2.1]hept-5-en-2-yl}-3-hydroxypropanoic acid CAS 2228637-58-7|3-(2-Bromoethyl)-6-chloro-2-methoxypyridine CAS 2172160-65-3|3-(2-Sulfanylpyrimidin-4-yl)pyrrolidin-3-ol CAS 2418729-39-0|Methyl 3-[(fluorosulfonyl)oxy]-5-sulfanylbenzoate CAS 2138508-10-6|6-bromo-1-(trifluoromethyl)-2,3-dihydro-1H-indole CAS 2229141-97-1|1-Methyl-4-(2-methylbut-3-yn-2-yl)cyclohexane CAS 2228745-27-3|3-{4H,5H,6H-cyclopenta[b]thiophen-2-yl}oxolane-2,5-dione CAS 2137805-45-7|1-Chloro-3,3,5,5-tetramethylcyclohexane-1-carbonyl chloride CAS 2228386-31-8|2,2-Dimethyl-3-[(methylsulfanyl)methyl]cyclopropan-1-amine CAS 2228513-80-0|4-(1H-pyrazol-4-yl)benzene-1,2,3-triol CAS 2227793-66-8|rac-(1R,3R)-2,2-dimethyl-3-[(methylsulfanyl)methyl]cyclopropane-1-carboxylic acid CAS 2137589-93-4|1-Chloro-3-(trifluoromethyl)cyclohexane-1-carboxylic acid CAS 2649084-16-0|1-Fluoro-2-(2-isocyanatoethyl)-4-methylbenzene CAS 2137857-52-2|2-(Chloromethyl)-4-methyl-2-propyloxolane CAS 2228901-11-7|1-Bromo-4-chloro-2-(nitromethyl)benzene CAS 2228589-78-2|4-(1H-indol-2-yl)oxane-2,6-dione CAS 2757959-20-7|(2-Bromo-3-chlorophenyl)methyl 4-methylbenzene-1-sulfonate CAS 1823506-59-7|4-[5-(Trifluoromethyl)furan-2-yl]-1,3-oxazolidin-2-one CAS 2229672-64-2|1-(2-Methylhex-3-en-2-yl)cyclopropan-1-amine CAS 2229663-48-1|3-(But-1-en-1-yl)pentanedioic acid CAS 2757833-91-1|(2R,4S)-4-carbamoyl-4-fluoro-2-(2,2,2-trifluoroacetamido)butanoic acid CAS 2228794-37-2|Methyl 4-(dimethylamino)-3-(hydrazinylmethyl)benzoate CAS 2229450-49-9|3-[(4,6-Dichloropyridin-3-yl)oxy]propan-1-amine CAS 2227812-38-4|methyl 3-[(2S)-2-aminopropyl]-4-(dimethylamino)benzoate CAS 2680839-94-3|3,4-Dichloro-2-{[(prop-2-en-1-yloxy)carbonyl]amino}benzoic acid CAS 2680839-67-0|2,3-Dichloro-5-{[(prop-2-en-1-yloxy)carbonyl]amino}benzoic acid CAS 2228560-58-3|3,3-Difluoro-2-(4-methylpyridin-2-yl)propan-1-amine CAS 2229271-90-1|1-[2-(6-Methylpyridin-3-yl)ethyl]cyclopropan-1-ol CAS 2229125-73-7|3-[4-(2-Methylpropyl)phenoxy]azetidine CAS 2137700-51-5|1-({[(Tert-butoxy)carbonyl]amino}methyl)-3,3-diethylcyclobutane-1-carboxylic acid CAS 2229553-87-9|4-(1-ethyl-1H-imidazol-2-yl)-2-methylbutan-2-amine
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