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 2165181-37-1|4-Amino-4-(4-methylcyclohexyl)cyclohexan-1-ol CAS 2757921-63-2|6-Chloropyridin-3-yl 4-methylbenzene-1-sulfonate CAS 2228895-85-8|2-[2-Bromo-5-(trifluoromethyl)phenyl]oxirane CAS 2229496-71-1|1-{2-[4-(Propan-2-yloxy)phenyl]ethyl}cyclopropan-1-ol CAS 90418-22-7|5,5-Dichloro-1-(2-furanyl)-2,4-pentadien-1-one CAS 2228818-36-6|2-(3-Ethynylphenyl)-2-methylpropanal CAS 2168711-34-8|4-(chloromethyl)-1-cycloheptyl-3-methyl-1H-pyrazole CAS 2228748-10-3|2-(3,4-dihydro-2H-pyran-5-yl)acetaldehyde CAS 2229474-81-9|2-Amino-3-(4-bromo-3-methylphenyl)-2-methylpropan-1-ol CAS 2228950-58-9|5-(2-Methylfuran-3-yl)-1,2-oxazole-4-carboxylic acid CAS 2228160-48-1|{1-[(3-Methyloxetan-3-yl)methyl]cyclopropyl}methanol CAS 2757916-51-9|5-(Fluorosulfonyl)-2-methoxy-4-methylbenzoicacid CAS 2229319-68-8|1-methyl-3-(6-methylpyridin-2-yl)-1H-pyrazol-5-amine CAS 2172083-48-4|5-ethyl-1-(pentan-3-yl)-1H-1,2,3-triazole-4-carbothioamide CAS 2227663-93-4|(1S)-3-amino-1-(1,2,3-thiadiazol-4-yl)propan-1-ol CAS 2229089-36-3|4-(4-Methoxy-2-nitrophenyl)butan-2-one CAS 2229668-72-6|5-(Adamantan-1-yl)pent-3-en-2-amine CAS 2229629-42-7|2-Chloro-1-{5-[(dimethylamino)methyl]-1,3-thiazol-2-yl}ethan-1-ol CAS 2649055-44-5|2-Isothiocyanato-4-methoxybutanoic acid CAS 2228657-37-0|3-(3-Ethynylphenyl)-3-methylbutan-1-amine CAS 2992744-76-8|Tert-butyl 3-((5-cyanopyridin-3-yl)(methyl)amino)azetidine-1-carboxylate CAS 2992743-77-6|1-Piperazinecarboxylic acid, 4-(6-cyano-2-pyrazinyl)-, 1,1-dimethylethyl ester CAS 2137576-19-1|2-(1-Benzofuran-4-yl)-5-fluorobenzaldehyde CAS 2229659-03-2|3-(3,4-dihydro-1H-2-benzopyran-6-yl)prop-2-en-1-ol CAS 2138102-28-8|3-(5-Amino-2-methylcyclohexyl)pyridin-2-amine CAS 2229451-74-3|(2,6-Dimethoxy-4-methylphenyl)methanesulfonyl chloride CAS 2228794-29-2|2-(2-Hydroxy-4-methylphenyl)-2-methylpropanal CAS 2227662-91-9|(2S)-non-5-en-2-amine CAS 104295-84-3|1-Chloro-7-(ethylsulfonyl)naphthalene CAS 2227795-56-2|rac-[(1R,2R)-2-(1H-pyrazol-3-yl)cyclopropyl]methanamine CAS 2228072-18-0|(2S)-4-{bicyclo[2.2.1]hept-5-en-2-yl}butan-2-ol CAS 1213427-76-9|Methyl (I(2)R)-I(2)-amino-2-(4-chlorophenoxy)-3-pyridinepropanoate CAS 2227772-14-5|rac-(1R,2R)-2-(3,5-dimethoxy-4-methylphenyl)cyclopropane-1-carboxylic acid CAS 60669-71-8|5,5-Dimethoxy-1,3-bis(3-methylphenyl)-2,4-imidazolidinedione CAS 6990-17-6|3,7-Dimethyl-10-(1-methylethylidene)-3,6-cyclodecadien-1-one CAS 74635-70-4|Kaur-16-en-18-oic acid, 12-hydroxy-, methyl ester, (4I+/-,12I+/-)- CAS 1213653-04-3|Methyl (I(2)R)-I(2),4-diamino-3,5,6-trichloro-2-pyridinepropanoate CAS 1604026-73-4|2H-Pyran-3-amine, N-[3-(2-furanyl)-2-propen-1-yl]tetrahydro- CAS 32573-53-8|Iron, bis(3-acetyl-6-methyl-2H-pyran-2,4(3H)-dionato-O3,O4)- CAS 1213892-07-9|(I+/-S)-I+/--Butyl-5-(hexahydro-1H-azepin-1-yl)-2-furanmethanamine CAS 6989-23-7|6,6a(2)-Diapo-I,I-carotenedioic acid, dihexadecyl ester, 9-cis- CAS 874460-09-0|B-[4-[[(2-Pyridinylmethyl)amino]carbonyl]phenyl]boronic acid CAS 1388098-53-0|Benzeneethanol, I(2)-amino-2,4,6-trimethoxy-I+/--methyl-, (I+/-R,I(2)R)- CAS 91241-39-3|4-Amino-N-(6-chloro-5-methyl-3-pyridazinyl)benzenesulfonamide CAS 1207665-67-5|4-[2-[(5-Fluorothieno[2,3-d]pyrimidin-4-yl)amino]ethyl]phenol CAS 78156-37-3|1,6-Dihydro-5-methoxy-1-(phenylmethyl)-3(2H)-pyridinone oxime CAS 1379892-26-8|Piperazine, 1-[3-[4-(2-chlorophenoxy)phenyl]propyl]-4-methyl- CAS 467-35-6|Formosanan-2-one, 16,17-dihydro-17-hydroxy-19-methyl-, (19I+/-)- CAS 1969-45-5|1,4-Benzenediol, 2,5-bis(1,1-dimethylethyl)-, 1,4-dicarbamate CAS 20927-58-6|2,3-Dihydro-3-methyl-4-(4-methylphenyl)-1H-1,5-benzodiazepine CAS 34716-74-0|2-(1-Oxo-3-phenyl-2-propen-1-yl)-2,5-cyclohexadiene-1,4-dione CAS 131-34-0|2-(Dimethylamino)-1-phenylethyl I+/--methyl-1-naphthaleneacetate CAS 49552-25-2|Cyanamide, [1-(4-chlorophenyl)-4,5-dihydro-1H-imidazol-2-yl]- CAS 1212846-31-5|(2R)-2-[2-[(2-Chloro-6-fluorophenyl)methoxy]phenyl]piperazine CAS 498574-95-1|Hexanoic acid, 2-ethyl-, 2-(benzoyloxy)-1,3-propanediyl ester CAS 2228289-83-4|1-(But-3-yn-2-yl)-2-fluoro-4-nitrobenzene CAS 103681-99-8|Bicyclo[2.2.1]heptan-2-ol, 3-(phenylseleno)-, (2-endo,3-exo)- CAS 1185738-99-1|N-(3-Methoxypropyl)-10-oxo-15-oxa-2,9,11-triazahexadecanamide CAS 1175561-07-5|(4-((tert-Butylsulfonyl)methyl)phenyl)boronic acid CAS 2338-32-1|4,5,6-Trichloro-1-methyl-2-(trifluoromethyl)-1H-benzimidazole CAS 2228303-38-4|2-[1-(3-Ethynylphenyl)cyclopropyl]propan-2-amine CAS 37637-59-5|10-Ethyl-6-(hydroxymethyl)benzo[g]pteridine-2,4(3H,10H)-dione CAS 861897-67-8|5,10,15,20-Tetrakis(3-chloro-4-methylphenyl)-21H,23H-porphine CAS 107527-01-5|2-[(2,2-Diphenylacetyl)thio]-N,N-diethyl-N-methylethanaminium CAS 52000-34-7|Phosphinic acid, [(2,2,6,6-tetramethyl-1-piperidinyl)methyl]- CAS 58349-78-3|9,10-Dihydro-9-(2-nitroethenyl)-9,10[1a(2),2a(2)]-benzenoanthracene CAS 1092348-69-0|5,6,7,8-Tetrahydro-3-nitro-8-oxo-2-naphthalenecarboxylic acid CAS 1211-10-5|2,3,5,6-Tetrahydro-8-methoxy-1,5-imino-3-benzazocin-4(1H)-one CAS 2228155-90-4|2-methyl-2-(2-methyl-2H-indazol-3-yl)propanal CAS 20926-05-0|2,5-Dichloro-3,6-bis(dimethylamino)-1,4-benzenedicarbonitrile CAS 124136-45-4|Acetic acid, mercapto-, stearate, I+/--ester with chloramphenicol CAS 1080-01-9|2-(Dimethylamino)-6-[(2-hydroxyethyl)amino]-4(3H)-pyrimidinone CAS 2228302-97-2|4-(2-Bromo-5-methylphenyl)-2-methylbutanoic acid CAS 1236567-17-1|5-(1H-Benzotriazol-6-yl)-2,2-dimethyl-4H-1,3-benzodioxin-4-one CAS 74416-92-5|8-(Acetyloxy)-3,10-dimethylbenzo[g]pteridine-2,4(3H,10H)-dione CAS 58551-84-1|5-(2-Chlorophenyl)-N-cyclopropyl-1,2,4-oxadiazole-3-ethanamine CAS 18066-77-8|2-[2-(3,4,5-Trimethoxyphenyl)ethyl]-1H-isoindole-1,3(2H)-dione CAS 139336-75-7|Sulfonium, (2-ethoxy-2-oxo-1-phenylethyl)dimethyl-, inner salt CAS 98545-59-6|Methyl 5-(bromomethyl)-4-(chloromethyl)-2-thiophenecarboxylate CAS 90766-49-7|5-Bromo-2,3-dihydro-1-methyl-2-oxo-1H-indole-4-carboxylic acid CAS 1000415-59-7|3,6,9,12,19,22,25,28-Octaoxa-15,16-dithiatriacontane-1,30-diol CAS 681811-81-4|I+/--[(3,4-Dimethoxyphenyl)methylene]-3-methoxybenzeneacetic acid CAS 91362-62-8|3-(2,4-Dimethylphenyl)-2,4,10-trioxatricyclo[3.3.1.13,7]decane CAS 1216872-66-0|8-Bromo-2-(2-methoxyphenyl)imidazo[1,2-a]pyridine-3-ethanamine CAS 1563930-00-6|4-Thiazolemethanamine, 2-[2-[4-(1-methylethyl)phenyl]ethenyl]- CAS 1803716-14-4|Benzenepropanoic acid, 4-cyano-3-(hydroxymethyl)-, ethyl ester CAS 2145-28-0|Sulfur, [3-[(dicyanomethyl)azo]phenyl]pentafluoro-, (OC-6-21)- CAS 36412-15-4|2,3a,4,4a,6,8-Hexahydrobenzo[1,2-c:5,4-ca(2)]dipyrazole-3,5-dione CAS 1704121-34-5|Benzenemethanamine, 2-(difluoromethyl)-4-methoxy-I+/-,I+/--dimethyl- CAS 67594-68-7|6H-7I>>4-[1,2]Dithiolo[5,1-e]isothiazole, 2,5-dimethyl-6-phenyl- CAS 2171241-66-8|(3S)-1-[2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-1,3-thiazole-4-carbonyl]piper CAS 2138079-12-4|1-(Hydroxymethyl)-2-azabicyclo[2.2.1]heptan-3-one CAS 2172509-18-9|benzyl N-{4-[2-(chlorosulfonyl)ethyl]phenyl}carbamate CAS 2105705-61-9|3-Amino-3-{bicyclo[4.1.0]heptan-3-yl}propanoic acid CAS 2292858-46-7|2-(Trifluoroacetamido)hex-4-ynoic acid CAS 2280911-09-1|benzyl N-(2,3-dihydroxybutyl)carbamate CAS 2759141-82-5|3-Bromo-5,6,7-trifluoro-1H-indole CAS 1260017-56-8|3(2H)-Benzofuranone, 4,6-bis(trifluoromethyl)- CAS 2228385-87-1|2-[1-(Aminooxy)-2-methylpropan-2-yl]-6-methoxyphenol CAS 2228173-18-8|2-Methoxy-6-(prop-2-yn-1-yl)phenol
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