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 |
Molecular Formula |
Chemical & Physical Properties |
CAS Number |
| 2,3-Diaminophenol
|
C6H8N2O
|
Molecular Weight:124.141
Density:1.3±0.1 g/cm3
Boiling Point:303.6±27.0 °C at 760 mmHg
Melting Point:161-165 °C(lit.)
|
59649-56-8
|
| Nialamide
|
C16H18N4O2
|
Molecular Weight:298.34000
Density:1.203g/cm3
Boiling Point:538.1ºC at 760mmHg
Melting Point:152-154ºC(lit.)
|
51-12-7
|
| 1-(4-Fluorophenyl)-2-(pyridin-4-yl)ethanone
|
C13H10FNO
|
Molecular Weight:215.223
Density:1.2±0.1 g/cm3
Boiling Point:362.6±22.0 °C at 760 mmHg
Melting Point:N/A
|
6576-05-2
|
| 2-(2-pyridylazo)-1-naphthol
|
C15H11N3O
|
Molecular Weight:249.26700
Density:1.24g/cm3
Boiling Point:444.8ºC at 760 mmHg
Melting Point:124-128ºC
|
10335-31-6
|
| 2-chloro-5-fluoro-4-iodo-3-methylpyridine
|
C6H4ClFIN
|
Molecular Weight:271.45900
Density:1.979g/cm3
Boiling Point:264.007ºC at 760 mmHg
Melting Point:N/A
|
884494-50-2
|
| 4-Fluoro-D-phenylalanine. HCl
|
C9H11ClFNO2
|
Molecular Weight:219.641
Density:N/A
Boiling Point:N/A
Melting Point:245-251ºC (dec.)(lit.)
|
64231-54-5
|
| 5-(1-methylpiperidin-4-yl)-1,3,4-oxadiazol-2-amine
|
C8H14N4O
|
Molecular Weight:182.22300
Density:N/A
Boiling Point:N/A
Melting Point:N/A
|
7659-03-2
|
| methyl 5-(2-chlorophenyl)furan-2-carboxylate
|
C12H9ClO3
|
Molecular Weight:236.65100
Density:N/A
Boiling Point:N/A
Melting Point:N/A
|
41019-38-9
|
| 5-(4-bromophenyl)pentanoic acid
|
C11H13BrO2
|
Molecular Weight:257.12400
Density:1.408g/cm3
Boiling Point:387.511ºC at 760 mmHg
Melting Point:N/A
|
22647-95-6
|
| 5-(4-bromophenyl)thiophene-2-carboxylic acid
|
C11H7BrO2S
|
Molecular Weight:283.14100
Density:1.637g/cm3
Boiling Point:438.8ºC at 760 mmHg
Melting Point:N/A
|
40133-13-9
|
| 3-(4-tert-butylphenyl)-2,5-diphenyl-3,4-dihydropyrazole
|
C25H26N2
|
Molecular Weight:354.48700
Density:1.04g/cm3
Boiling Point:493ºC at 760mmHg
Melting Point:N/A
|
152015-93-5
|
| 5-(4-CHLORO-3-NITRO)-FURAN-2-CARBOXYLIC ACID
|
C11H6ClNO5
|
Molecular Weight:267.62200
Density:N/A
Boiling Point:N/A
Melting Point:N/A
|
54023-03-9
|
| 5-(4-chlorophenyl)-2-(1,3-dioxolan-2-yl)-3-furoic acid
|
C14H11ClO5
|
Molecular Weight:294.68700
Density:N/A
Boiling Point:N/A
Melting Point:N/A
|
306936-13-0
|
| 5-(4-Chlorophenyl)-1,3,4-oxadiazole-2-thiol
|
C8H5ClN2OS
|
Molecular Weight:212.65600
Density:N/A
Boiling Point:N/A
Melting Point:N/A
|
203268-67-1
|
| 5-(4-Chlorophenyl)-3-p-tolyl-4,5-dihydro-1H-pyrazole-1-carboxamide
|
C17H16ClN3O
|
Molecular Weight:313.78100
Density:N/A
Boiling Point:N/A
Melting Point:N/A
|
885269-75-0
|
| 3-(4-chlorophenyl)-4-(2-methoxyethyl)-1H-1,2,4-triazole-5-thione
|
C11H12ClN3OS
|
Molecular Weight:269.75000
Density:1.37g/cm3
Boiling Point:350.9ºC at 760mmHg
Melting Point:N/A
|
26438-54-0
|
| 3-(4-chlorophenyl)-4-(4-methylphenyl)-1H-1,2,4-triazole-5-thione
|
C15H12ClN3S
|
Molecular Weight:301.79400
Density:1.33g/cm3
Boiling Point:419.8ºC at 760mmHg
Melting Point:N/A
|
41401-15-4
|
| methyl 5-(4-chlorophenyl)furan-2-carboxylate
|
C12H9ClO3
|
Molecular Weight:236.65100
Density:N/A
Boiling Point:N/A
Melting Point:N/A
|
41019-40-3
|
| 5-(4-ETHOXY-PHENYLAMINO)-[1,3,4]THIADIAZOLE-2-THIOL
|
C10H11N3OS2
|
Molecular Weight:253.34400
Density:1.41g/cm3
Boiling Point:371ºC at 760 mmHg
Melting Point:N/A
|
68161-60-4
|
| 5-(4-fluorobenzyl)-1,3,4-oxadiazol-2-amine
|
C9H8FN3O
|
Molecular Weight:193.17800
Density:1.336g/cm3
Boiling Point:364.7ºC at 760 mmHg
Melting Point:N/A
|
828911-26-8
|
| 5-(4-HYDROXY-PHENYL)-3H-[1,2,3]TRIAZOLE-4-CARBONITRILE
|
C9H6N4O
|
Molecular Weight:186.17000
Density:1.51g/cm3
Boiling Point:512.3ºC at 760 mmHg
Melting Point:N/A
|
39807-61-9
|
| 5-(4-ISOPROPYLPHENYL)-1,3,4-THIADIAZOL-2-AMINE
|
C11H13N3S
|
Molecular Weight:219.30600
Density:1.198g/cm3
Boiling Point:369.3ºC at 760mmHg
Melting Point:N/A
|
100987-89-1
|
| 5-(4-METHOXYBENZYL)-4,6-PYRIMIDINEDIOL
|
C12H12N2O3
|
Molecular Weight:232.23500
Density:1.3g/cm3
Boiling Point:447.9ºC at 760mmHg
Melting Point:N/A
|
16015-98-8
|
| 5-(4-METHOXY-PHENYL)-3H-[1,2,3]TRIAZOLE-4-CARBONITRILE
|
C10H8N4O
|
Molecular Weight:200.19700
Density:N/A
Boiling Point:N/A
Melting Point:N/A
|
39807-65-3
|
| 5-(4-METHOXY-PHENYL)-4-PHENYL-4H-[1,2,4]TRIAZOLE-3-THIOL
|
C15H13N3OS
|
Molecular Weight:283.34800
Density:1.27g/cm3
Boiling Point:402.8ºC at 760mmHg
Melting Point:N/A
|
91759-68-1
|
| 5-(4-METHYLPHENYL)FURAN-2-CARBOXYLIC ACID METHYL ESTER
|
C13H12O3
|
Molecular Weight:216.23300
Density:N/A
Boiling Point:N/A
Melting Point:N/A
|
52939-04-5
|
| 5-(4-Methylphenyl)thiophene-2-boronic acid
|
C11H11BO2S
|
Molecular Weight:218.08000
Density:1.259 g/cm3
Boiling Point:417.914ºC at 760 mmHg
Melting Point:N/A
|
296768-49-5
|
| 5-(4-TRIFLUOROMETHYL-PHENYL)-3,4-DIHYDRO2H-PYRROLE
|
C11H10F3N
|
Molecular Weight:213.19900
Density:1.24g/cm3
Boiling Point:228.7ºC at 760 mmHg
Melting Point:N/A
|
72216-08-1
|
| 2-methyl-5-(1,2-oxazol-5-yl)furan-3-sulfonyl chloride
|
C8H6ClNO4S
|
Molecular Weight:247.65600
Density:N/A
Boiling Point:N/A
Melting Point:N/A
|
924865-06-5
|
| 5-(5-methoxy-2-nitrophenyl)-1H-pyrimidine-2,4-dione
|
C11H9N3O5
|
Molecular Weight:263.20600
Density:N/A
Boiling Point:N/A
Melting Point:N/A
|
1005386-85-5
|
| 5-(5-Methyl-1H-imidazol-1-yl)-2-nitrobenzonitrile
|
C11H8N4O2
|
Molecular Weight:228.20700
Density:N/A
Boiling Point:N/A
Melting Point:N/A
|
1201902-35-3
|
| 5-(6-chloropyridin-3-yl)pyrazin-2-amine
|
C9H7ClN4
|
Molecular Weight:206.63200
Density:N/A
Boiling Point:N/A
Melting Point:N/A
|
835876-15-8
|
| 5-(ACETYLAMINO)THIOPHENE-2-CARBOXYLIC ACID
|
C7H7NO3S
|
Molecular Weight:185.20000
Density:1.487g/cm3
Boiling Point:471.3ºC at 760 mmHg
Melting Point:N/A
|
89499-46-7
|
| CYCLOHEXANE-1,3-DICARBOXYLIC ACID DIMETHYL ESTER
|
C6H12N2O
|
Molecular Weight:128.17200
Density:N/A
Boiling Point:N/A
Melting Point:N/A
|
67433-53-8
|
| 5-sulfamoylfuran-2-carboxylic acid
|
C5H5NO5S
|
Molecular Weight:191.16200
Density:N/A
Boiling Point:N/A
Melting Point:N/A
|
98027-63-5
|
| 5-benzyloxy-2-(chloromethyl)-4H-pyran-4-one
|
C13H11ClO3
|
Molecular Weight:250.67800
Density:N/A
Boiling Point:N/A
Melting Point:N/A
|
89539-54-8
|
| 5-(Bromomethyl)-1,3-dichloro-2-methoxybenzene
|
C8H7BrCl2O
|
Molecular Weight:269.95100
Density:1.618g/cm3
Boiling Point:301.6ºC at 760 mmHg
Melting Point:N/A
|
98544-66-2
|
| 5-(bromomethyl)pyrrolidin-2-one
|
C5H8BrNO
|
Molecular Weight:178.02700
Density:1.541 g/cm3
Boiling Point:336.1ºC at 760 mmHg
Melting Point:N/A
|
190271-85-3
|
| 5-(BROMOMETHYL)-3-(2,4-DICHLOROPHENYL)ISOXAZOLE
|
C10H6BrCl2NO
|
Molecular Weight:306.97100
Density:1.667g/cm3
Boiling Point:384.017ºC at 760 mmHg
Melting Point:N/A
|
5301-00-8
|
| 5-(Chloromethyl)-N-phenyl-1,3,4-thiadiazole-2-carboxamide
|
C10H8ClN3OS
|
Molecular Weight:253.70800
Density:N/A
Boiling Point:N/A
Melting Point:N/A
|
113940-13-9
|
| 5-(Furan-2-yl)-3-(thiophen-2-yl)-4,5-dihydro-1H-pyrazole-1-carboxamide
|
C12H11N3O2S
|
Molecular Weight:261.30000
Density:N/A
Boiling Point:N/A
Melting Point:N/A
|
885269-94-3
|
| 5-(Furan-2-yl)-3-p-tolyl-4,5-dihydro-1H-pyrazole-1-carboxamide
|
C15H15N3O2
|
Molecular Weight:269.29900
Density:N/A
Boiling Point:N/A
Melting Point:N/A
|
885269-83-0
|
| 5-(HYDROXYMETHYL)-2-METHYL-3-FUROIC ACID
|
C7H8O4
|
Molecular Weight:156.13600
Density:1.359g/cm3
Boiling Point:335.9ºC at 760mmHg
Melting Point:N/A
|
15341-68-1
|
| 5-(Methoxymethyl)pyridine-3-boronic acid pinacol ester
|
C13H20BNO3
|
Molecular Weight:249.11400
Density:N/A
Boiling Point:N/A
Melting Point:N/A
|
1174766-05-2
|
| 5-(Morpholinomethyl)isoxazole-3-carbaldehyde
|
C9H12N2O3
|
Molecular Weight:196.20300
Density:N/A
Boiling Point:N/A
Melting Point:N/A
|
893749-85-4
|
| 5-(2-methylphenyl)-1H-pyrimidine-2,4-dione
|
C11H10N2O2
|
Molecular Weight:202.20900
Density:N/A
Boiling Point:N/A
Melting Point:N/A
|
952402-53-8
|
| 5-(1-Piperazinyl)-1H-1,2,4-triazol-3-amine
|
C6H12N6
|
Molecular Weight:168.20000
Density:N/A
Boiling Point:N/A
Melting Point:N/A
|
118630-27-6
|
| 5-(Propoxymethyl)-2-furoic acid
|
C9H12O4
|
Molecular Weight:184.18900
Density:1.173g/cm3
Boiling Point:293.7ºC at 760 mmHg
Melting Point:N/A
|
758721-16-3
|
| 5-(PYRROLIDINE-1-SULFONYL)-1H-INDOLE-2,3-DIONE
|
C12H12N2O4S
|
Molecular Weight:280.30000
Density:N/A
Boiling Point:N/A
Melting Point:N/A
|
220510-17-8
|
| 1H-Indole, 5-(tributylstannyl)-
|
C20H33NSn
|
Molecular Weight:406.18400
Density:N/A
Boiling Point:N/A
Melting Point:N/A
|
143724-34-9
|