CAS Number Index

A CAS Registry Number,also referred to as CASRN or CAS Number, is a unique numerical identifier assigned by the Chemical Abstracts Service (CAS) to every chemical substance described in the open scientific literature (currently including all substances described from 1957 through the present, plus some substances from the early or mid 1900s), including organic and inorganiccompounds, minerals, isotopes, alloys and nonstructurable materials (UVCBs, of unknown, variable composition, or biological origin).The registry maintained by CAS is an authoritative collection of disclosed chemical substance information. It currently identifies more than 144 million unique organic and inorganic substances and 67 million protein and DNA sequences,plus additional information about each substance. It is updated with around 15,000 additional new substances daily.（information coming from wikipedia.org)

Name CAS Number
3-[(Propan-2-yloxy)methyl]-5-{4-[5-(trifluoromethyl)-1,2,4-oxadiazol-3-yl]phenyl}-1,2,4-oxadiazole 1955520-19-0
rac-(2R,3R)-2-(1-phenyl-1H-imidazol-2-yl)oxolan-3-amine 2031242-27-8
(2R,3R)-2-(1-methyl-1H-pyrazol-5-yl)tetrahydrofuran-3-carbaldehyde 1932259-66-9
(3S,4R)-3-Bromo-4-methoxythiolane 1,1-dioxide 2109277-80-5
2,2-Dimethylbut-3-en-1-yl methanesulfonate 70074-03-2
5-methyl-5H,6H,7H-pyrrolo[1,2-a]imidazol-7-amine 1880457-10-2
4-Methyl-4,5,6,7-tetrahydro-1-benzothiophen-7-one 1864061-40-4
5-(Hydroxymethyl)-5-methylpiperidin-2-one 1909336-03-3
5-(Hydroxymethyl)-5-phenylpiperidin-2-one 1909308-61-7
Tert-butyl 4-cyano-4-(4-oxooxolan-3-yl)piperidine-1-carboxylate 1909336-54-4
tert-butyl N-(5,5-dimethyl-1-oxohexan-2-yl)carbamate 1909348-64-6
2-Methyl-2-{1,4,7-trioxaspiro[4.4]nonan-9-yl}propanenitrile 1909327-19-0
2-Methyl-2-{1,4,7-trioxaspiro[4.4]nonan-9-yl}propan-1-amine 1909326-62-0
4-methyl-4H-pyran-2,6-dicarboxylic acid 23046-94-8
5-(Aminomethyl)-6-methylpyridine-3-sulfonamide 1871876-14-0
rac-methyl (2R,3R)-1-ethyl-5-oxo-2-(pyridin-3-yl)pyrrolidine-3-carboxylate, trans 1909286-43-6
3-(Propan-2-yl)-2-azaspiro[3.4]octan-1-one 1870091-13-6
(1S,2S,7R)-2-Methyl-4-azatricyclo[5.2.1.0,2,6]decane-3,5-dione 1909301-29-6
3-(Oxan-4-yl)-2-azaspiro[3.3]heptan-1-one 1864319-13-0
3-Phenyl-2-azaspiro[3.4]octan-1-one 1876227-20-1
{1-[Amino(phenyl)methyl]cyclopentyl}methanol 1859652-90-6
3-(Thiophen-2-yl)-2-azaspiro[3.3]heptan-1-one 1857256-49-5
tert-Butyl N-({6-azaspiro[3.4]octan-8-yl}methyl)carbamate 1909336-06-6
2-amino-3,3,3-trifluoro-2-(1H-pyrrol-2-yl)propanoic acid 1909327-30-5
5-Carbamoyl-4-methylpyridine-2-carboxylic acid 1909314-03-9
rac-(5R,6R)-5-amino-1-methyl-6-(1-methyl-1H-imidazol-5-yl)piperidin-2-one 1909286-78-7
(Z)-3-(1,2,2,3-Tetramethylcyclopentyl)prop-2-enoic acid 861316-86-1
(2S,3R)-3-Ethoxy-2-phenylsulfanylcyclobutan-1-one 1909287-95-1
(2R,4R)-2-Pyridin-2-yloxan-4-amine 2102953-07-9
(4S,5S)-1-ethyl-4-(hydroxymethyl)-5-(pyridin-3-yl)pyrrolidin-2-one 1909287-81-5
7-chloro-1,3-dimethyl-1H-pyrazolo[3,4-d]pyridazine 1909320-06-4
3-(2-Hydroxy-4-(trifluoromethoxy)phenyl)acrylic acid 1262018-21-2
3-(3,5-dimethyl-1-{[2-(trimethylsilyl)ethoxy]methyl}-1H-pyrazol-4-yl)propanoic acid 1909311-89-2
rac-benzyl N-[(1R,3S)-3-[(chlorosulfonyl)methyl]cyclopentyl]carbamate 2307772-89-8
Methyl 2-fluoro-3-hydrazinylbenzoate 1388029-04-6
[(4-Amino-2-bromo-5-chlorophenyl)sulfanyl]formonitrile 1909326-34-6
4-Amino-2-bromo-5-chlorobenzene-1-thiol 1909309-30-3
2-(Aminomethyl)oxolane-3-carboxylic acid 1909319-62-5
rac-(5R,6R)-5-amino-1-cyclopropyl-6-(1-methyl-1H-imidazol-5-yl)piperidin-2-one 1909294-74-1
Ethyl 4-cyano-2-(2-cyanoethyl)-2-cyclopropanecarbonylbutanoate 1909305-87-8
1-tert-Butyl 2-methyl 5-oxo-3-(trifluoromethyl)pyrrolidine-1,2-dicarboxylate 1909305-82-3
Methyl (2S,5S)-5-methyltetrahydrofuran-2-carboxylate 1847423-09-9
rac-(2R,3R)-2-[1-(3-methoxypropyl)-1H-pyrazol-5-yl]oxolane-3-carboxylic acid 1909286-75-4
3-Bromo-2-hydroxy-2-phenylpropanamide 1909319-68-1
Tert-butyl 3-(hydroxymethyl)-3-(methoxymethyl)pyrrolidine-1-carboxylate 1909325-67-2
4,5-Bis[(methylamino)methyl]thiophene-2-carboxylic acid 1909317-19-6
cyclopropyl(1,5-dimethyl-1H-pyrazol-3-yl)methanol 1702445-11-1
N-[(furan-2-yl)(4-methoxyphenyl)methyl]-4-methylbenzene-1-sulfonamide 1631738-40-3
(4R,5S)-4-amino-1-cyclopropyl-5-pyridin-3-ylpyrrolidin-2-one 2307782-82-5
2-(4-benzoylphenoxy)-N-{1-[(4-hydroxyphenyl)methyl]piperidin-4-yl}acetamide 1909324-98-6

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