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
2,2-Difluoro-1-(3-methylpyridin-2-yl)ethan-1-amine 2090650-67-0
2-Pyridinesulfonamide, 5-(chloromethyl)-4-(difluoromethyl)- 1805305-16-1
3-(2,2,3,3-Tetrafluoropropyl)azetidin-3-ol 1935580-18-9
Methyl 3,5-Difluoro-2,6-dimethoxybenzoate 2116770-98-8
[4-(2-Bromo-1,3-thiazol-4-yl)phenyl]methanol 2090261-89-3
2-(Bromomethyl)-1,1-difluorocyclobutane 2624135-87-9
4-Bromo-2-chloro-5-iodobenzaldehyde 2091701-35-6
B-(1-Ethyl-1,2-dihydro-2-oxo-4-pyridinyl)boronic acid 1588769-26-9
(3R)-3-(Propan-2-yl)-1,4-diazepan-2-one 2090218-87-2
6-Methyl-2-[(methylamino)methyl]-3,4-dihydropyrimidin-4-one 1281488-46-7
3-Bromo-2-fluoro-5-iodobenzaldehyde 2091143-73-4
5,8-Dioxaspiro[3.5]nonan-9-one 2138075-46-2
2-(Propan-2-yl)-4-(pyrrolidin-1-yl)pyrrolidine 2138245-90-4
4-(Difluoromethyl)piperidine-1-sulfonyl chloride 1934840-56-8
4-(3-Oxocyclobutyl)benzoic acid 2138072-56-5
1-Methyl-4-[4-(trifluoromethyl)-1,3-thiazol-2-yl]-1,4-diazepane 2548992-24-9
Benzoic acid, 3-(bromomethyl)-6-cyano-2-(trifluoromethyl)-, ethyl ester 1805591-07-4
Benzoic acid, 2-chloro-3-cyano-5-(difluoromethoxy)-, ethyl ester 1805469-85-5
1-chloro-1-[2-chloro-4-(fluoromethyl)phenyl]propan-2-one 1803760-69-1
Ethyl 2-chloro-3-cyano-4-fluorobenzoate 1807006-43-4
Ethyl 2-chloro-3-cyano-6-fluorobenzoate 1807165-53-2
4-(Trifluoromethyl)thiophene-3-carbothioamide 2225136-18-3
2-Azabicyclo[2.1.1]hexane-2-carbonyl chloride 2225146-34-7
Ethyl 2-(2-((5-hydroxypentyl)oxy)ethoxy)acetate 2361118-26-3
3-[(Dimethylamino)methyl]azetidine-1-carbonyl chloride 1856671-99-2
(Pyrrolidin-3-yl)methanesulfonyl fluoride 1934637-70-3
Benzenesulfonyl chloride, 3-(chloromethyl)-4-cyano-2-ethyl- 1807144-56-4
5-(3-methyl-1,2-oxazol-5-yl)-1H-pyrazole-4-carboxylic acid 2091458-84-1
5-(5-methyl-1,2-oxazol-3-yl)-1H-pyrazole-4-carboxylic acid 2091110-96-0
2-[1-(Aminomethyl)-2-methylcyclopentyl]propan-2-ol 1855770-43-2
1-[(2-Chlorophenyl)amino]-3-fluoropropan-2-ol 1860983-30-7
2-(Bromomethyl)-2-methyloxane 1934399-84-4
4-[4-[(Trimethylsilyl)ethynyl]phenyl]morpholine 1583305-71-8
2-((4-Chlorophenyl)ethynyl)-5-fluorobenzaldehyde 1939148-83-0
5-Fluoro-2-((4-fluorophenyl)ethynyl)benzaldehyde 1814960-21-8
3-Hydroxy-4-iodobenzo[b]thiophene-2-carboxylic acid 1935643-33-6
Ethyl 1-oxadispiro[2.0.3^{4}.3^{3}]decane-2-carboxylate 1866027-13-5
7-Hydroxy-8-[2-[2-nitro-4-[[2-(sulfooxy)ethyl]sulfonyl]phenyl]diazenyl]-2-naphthalenesulfonic acid 28535-20-8
4-Hydroxy-3-[2-[2-nitro-4-[[2-(sulfooxy)ethyl]sulfonyl]phenyl]diazenyl]-2,7-naphthalenedisulfonic acid 28535-16-2
N-[5-[[1-(5-Acetyl-4-hydroxy-2,6-dioxo-2H-pyran-3(6H)-ylidene)ethyl]amino]-2-hydroxyphenyl]acetamide 64353-89-5
7-Methyl-4-oxo-3,4-dihydropyrido[2,3-d]pyrimidine-6-carboxylic acid 1282105-06-9
N-(6-(4-mercaptophenyl)pyridazin-3-yl)acetamide 1286706-01-1
methyl 2-{4-oxo-1H,4H,5H-pyrazolo[3,4-d]pyrimidin-1-yl}acetate 1311316-89-8
1-tert-butyl-6-hydrazinyl-1H,4H,5H-pyrazolo[3,4-d]pyrimidin-4-one 1311316-36-5
1-tert-butyl-6-hydrazinyl-1H,4H,5H-pyrazolo[3,4-d]pyrimidine 1311316-97-8
11-Nitro-8lambda6-thia-2,3,5,7-tetraazatricyclo[7.4.0.0,2,6]trideca-1(13),3,5,9,11-pentaene-8,8-dione 1311315-45-3
2-(3-Chlorophenyl)-5-methyl-7-(2,4,5-trimethoxyphenyl)-4,7-dihydro-[1,2,4]triazolo[1,5-a]pyrimidine-6-carboxamide 539815-51-5
9,9-Dimethyl-3,6-dinitrofluorene-2,7-diol 1189567-59-6
2-(2,3,4,5,6-pentafluorophenyl)-5-(trifluoromethyl)-4H-pyrazol-3-one 1191255-55-6
5-Bromo-1-ethyl-6-methylpyridin-2(1H)-one 1611464-85-7

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