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	Molecular Formula	Chemical & Physical Properties	CAS Number
1,2-Dihydro-3H-pyrazol-3-one	C₃H₄N₂O	Molecular Weight:84.077 Density:1.4±0.1 g/cm3 Boiling Point:326.1±15.0 °C at 760 mmHg Melting Point:163 °C	137-45-1
2H-1-BENZOPYRAN-2-CARBOXYLIC ACID, 6-AMINO-3,4-DIHYDRO-	C₁₀H₁₁NO₃	Molecular Weight:193.19900 Density:N/A Boiling Point:N/A Melting Point:N/A	378252-02-9
OXAZOLE-2-CARBONITRILE	C₄H₂N₂O	Molecular Weight:94.07150 Density:1.25 g/cm3 Boiling Point:165.7ºC at 760 mmHg Melting Point:N/A	68776-60-3
2h-1-benzopyran-2-carboxylic acid, 3,4-dihydro-7-hydroxy-, ethyl ester	C₁₂H₁₄O₄	Molecular Weight:222.23700 Density:N/A Boiling Point:N/A Melting Point:N/A	124439-98-1
5-IODO-1H-BENZO[D]IMIDAZOLE-2(3H)-THIONE	C₇H₅IN₂S	Molecular Weight:276.09700 Density:N/A Boiling Point:N/A Melting Point:N/A	126174-81-0
2-hydroxy-2-phenyl-propionic acid ethyl ester	C₁₁H₁₄O₃	Molecular Weight:194.22700 Density:N/A Boiling Point:N/A Melting Point:N/A	32122-08-0
5-Nitrobenzotriazole	C₆H₄N₄O₂	Molecular Weight:164.12200 Density:1.638g/cm3 Boiling Point:392.7ºC at 760mmHg Melting Point:206-207ºC	2338-12-7
1-(2-Chloroethyl)-1H-1,2,4-triazole	C₄H₆ClN₃	Molecular Weight:131.56400 Density:1.34 g/cm3 Boiling Point:252.8ºC at 760 mmHg Melting Point:N/A	3236-66-6
2-(Chloromethyl)-1,3-oxazole	C₄H₄ClNO	Molecular Weight:117.534 Density:1.3±0.1 g/cm3 Boiling Point:143.5±23.0 °C at 760 mmHg Melting Point:N/A	185246-17-7
Boc-Dab(Alloc)-OH·DCHA	C₂₅H₄₅N₃O₆	Molecular Weight:483.641 Density:N/A Boiling Point:651.1ºC at 760 mmHg Melting Point:N/A	327156-92-3
BENZO[D]ISOXAZOLE-5-SULFONYL CHLORIDE	C₇H₄ClNO₃S	Molecular Weight:217.63000 Density:N/A Boiling Point:N/A Melting Point:N/A	16331-62-7
6-Methoxy-1H-indole-3-carbonitrile	C₁₀H₈N₂O	Molecular Weight:172.183 Density:1.3±0.1 g/cm3 Boiling Point:385.0±22.0 °C at 760 mmHg Melting Point:N/A	145692-57-5
Benzonitrile,4-(2-oxopropoxy)-	C₁₀H₉NO₂	Molecular Weight:175.18400 Density:1.14g/cm3 Boiling Point:328.1ºC at 760mmHg Melting Point:N/A	18859-28-4
3-(4-METHYLPHENYL)CYCLOPENTANONE	C₁₂H₁₄O	Molecular Weight:174.23900 Density:N/A Boiling Point:N/A Melting Point:N/A	86921-82-6
Methyl 4-((chlorosulfonyl)methyl)benzoate	C₉H₉ClO₄S	Molecular Weight:248.68300 Density:N/A Boiling Point:N/A Melting Point:116 â„ƒ	130047-14-2
(2S,4S)-4-FLUOROPYRROLIDINE-2-CARBOXYLIC ACID	C₅H₈FNO₂	Molecular Weight:133.121 Density:1.3±0.1 g/cm3 Boiling Point:265.1±40.0 °C at 760 mmHg Melting Point:N/A	2438-57-5
fmoc-(s)-3-amino-3-(4-methyl-phenyl)-propionic acid	C₂₅H₂₃NO₄	Molecular Weight:401.454 Density:1.3±0.1 g/cm3 Boiling Point:627.5±55.0 °C at 760 mmHg Melting Point:N/A	479064-99-8
3,4-Dichlorophenylalanine	C₉H₉Cl₂NO₂	Molecular Weight:234.079 Density:1.5±0.1 g/cm3 Boiling Point:370.6±42.0 °C at 760 mmHg Melting Point:N/A	52794-99-7
(R)-3-AMINO-4-(PYRIDIN-3-YL)BUTANOIC ACID DIHYDROCHLORIDE	C₉H₁₄Cl₂N₂O₂	Molecular Weight:253.12600 Density:N/A Boiling Point:415.6ºC at 760 mmHg Melting Point:N/A	269396-64-7
fmoc-gln(1-adamantyl)-oh	C₃₀H₃₄N₂O₅	Molecular Weight:502.60100 Density:N/A Boiling Point:N/A Melting Point:N/A	159926-84-8
3-(trifluoroacetylamino)-1-propanol	C₅H₈F₃NO₂	Molecular Weight:171.11800 Density:1.355 g/mL at 20ºC(lit.) Boiling Point:120-121ºC0.03 mm Hg(lit.) Melting Point:N/A	78008-15-8
ac-glu-nh2	C₇H₁₂N₂O₄	Molecular Weight:188.18100 Density:1.291 g/cm3 Boiling Point:582.76ºC at 760 mmHg Melting Point:N/A	25460-87-1
H-D-His(3-Me)-OH	C₇H₁₁N₃O₂	Molecular Weight:169.18100 Density:N/A Boiling Point:N/A Melting Point:N/A	163750-76-3
Z-Dehydro-Ala-OMe	C₁₂H₁₃NO₄	Molecular Weight:235.23600 Density:1.182g/cm3 Boiling Point:358ºC at 760 mmHg Melting Point:N/A	21149-17-7
(r)-3-amino-4-(3,4-dichlorophenyl)butanoic acid hydrochloride	C₁₀H₁₂Cl₃NO₂	Molecular Weight:284.567 Density:1.395 Boiling Point:416.6ºC at 760mmHg Melting Point:N/A	269396-55-6
Z-D-Lys(Boc)-OH	C₁₁H₂₂N₂O₄	Molecular Weight:246.303 Density:1.2±0.1 g/cm3 Boiling Point:412.9±40.0 °C at 760 mmHg Melting Point:61-63°C	66845-42-9
Boc-N-Me-Phg-OH	C₁₄H₁₉NO₄	Molecular Weight:265.305 Density:1.2±0.1 g/cm3 Boiling Point:404.5±40.0 °C at 760 mmHg Melting Point:118.9-124.4ºC	30925-11-2
H-Ala-PNA.HCL	C₉H₁₂ClN₃O₃	Molecular Weight:245.66300 Density:N/A Boiling Point:443.4ºC at 760 mmHg Melting Point:N/A	31796-55-1
Cbz-L-Valinol	C₁₃H₁₉NO₃	Molecular Weight:237.295 Density:1.1±0.1 g/cm3 Boiling Point:391.9±35.0 °C at 760 mmHg Melting Point:N/A	6216-65-5
3,5-Dibromo-L-tyrosine	C₉H₉Br₂NO₃	Molecular Weight:338.981 Density:2.0±0.1 g/cm3 Boiling Point:416.6±45.0 °C at 760 mmHg Melting Point:N/A	300-38-9
Boc-His(3-Me)-OH	C₁₂H₁₉N₃O₄	Molecular Weight:269.29700 Density:1.23 Boiling Point:502.2ºC at 760 mmHg Melting Point:N/A	61070-22-2
4-(Trifluoromethyl)phenylalanine	C₁₀H₁₀F₃NO₂	Molecular Weight:233.187 Density:1.4±0.1 g/cm3 Boiling Point:315.9±42.0 °C at 760 mmHg Melting Point:N/A	774178-39-1
N-Acetyl-L-valine	C₇H₁₃NO₃	Molecular Weight:159.183 Density:1.1±0.1 g/cm3 Boiling Point:362.2±25.0 °C at 760 mmHg Melting Point:148°C	3067-19-4
boc-(s)-3-amino-3-(2,4-dichloro-phenyl)-propionic acid	C₁₄H₁₇Cl₂NO₄	Molecular Weight:334.19500 Density:N/A Boiling Point:N/A Melting Point:N/A	499995-81-2
Boc-D-Arg(Pbf)-OH	C₂₄H₃₈N₄O₇S	Molecular Weight:526.64600 Density:N/A Boiling Point:N/A Melting Point:N/A	186698-61-3
Fmoc-His(1-Me)-OH	C₂₂H₂₁N₃O₄	Molecular Weight:391.42000 Density:N/A Boiling Point:N/A Melting Point:N/A	202920-22-7
L-Alanine 4-methoxy-β-naphthylamide hydrochloride	C₁₄H₁₇ClN₂O₂	Molecular Weight:280.75000 Density:N/A Boiling Point:N/A Melting Point:N/A	3438-14-0
Boc-L-Cyclopropylalanine-DCHA	C₂₃H₄₂N₂O₄	Molecular Weight:410.591 Density:1.21 Boiling Point:86 °C Melting Point:N/A	89483-07-8
Fmoc-Dab-OH	C₁₉H₂₀N₂O₄	Molecular Weight:340.37300 Density:1.294 g/cm3 Boiling Point:593.654ºC at 760 mmHg Melting Point:161 °C(dec.)	161420-87-7
Boc-His(Trt)-OH	C₃₀H₃₁N₃O₄	Molecular Weight:497.585 Density:1.2±0.1 g/cm3 Boiling Point:667.5±55.0 °C at 760 mmHg Melting Point:~130 °C (dec.)	32926-43-5
3-Amino-3-(4-hydroxyphenyl)propanoic acid	C₉H₁₁NO₃	Molecular Weight:181.189 Density:1.3±0.1 g/cm3 Boiling Point:378.7±32.0 °C at 760 mmHg Melting Point:N/A	73025-69-1
Fmoc-3-(4-thiazolyl)-Alanine	C₂₁H₁₈N₂O₄S	Molecular Weight:394.444 Density:1.4±0.1 g/cm3 Boiling Point:609.7±40.0 °C at 760 mmHg Melting Point:178.2 °C	205528-32-1
8-Aminooctanoic acid	C₈H₁₇NO₂	Molecular Weight:159.226 Density:1.0±0.1 g/cm3 Boiling Point:286.0±23.0 °C at 760 mmHg Melting Point:194 °C (dec.)(lit.)	1002-57-9
(S)-3-((((9H-Fluoren-9-yl)methoxy)carbonyl)amino)-4-(2,4-dichlorophenyl)butanoic acid	C₂₅H₂₁Cl₂NO₄	Molecular Weight:470.345 Density:1.4±0.1 g/cm3 Boiling Point:663.7±55.0 °C at 760 mmHg Melting Point:N/A	270063-49-5
(S)-tert-Butyl (1-cyclohexyl-2-hydroxyethyl)carbamate	C₁₃H₂₅NO₃	Molecular Weight:243.34200 Density:1.037 g/cm3 Boiling Point:371.2ºCat 760 mmHg Melting Point:83-87ºC(lit.)	107202-39-1
(Boc-aminooxy)acetic Acid	C₇H₁₃NO₅	Molecular Weight:191.18 Density:1.2±0.1 g/cm3 Boiling Point:N/A Melting Point:~115 °C (dec.)	42989-85-5
N-Formylglycine	C₃H₅NO₃	Molecular Weight:103.07700 Density:1.307 g/cm3 Boiling Point:450.2ºC at 760 mmHg Melting Point:149-151 °C	2491-15-8
boc-(s)-3-amino-3-(3-fluoro-phenyl)-propionic acid	C₁₄H₁₈FNO₄	Molecular Weight:283.295 Density:1.2±0.1 g/cm3 Boiling Point:422.1±40.0 °C at 760 mmHg Melting Point:N/A	500770-72-9
2-Methylphenyl-D-alanine	C₁₀H₁₃NO₂	Molecular Weight:179.216 Density:1.2±0.1 g/cm3 Boiling Point:326.2±30.0 °C at 760 mmHg Melting Point:N/A	80126-54-1
H-D-HomoPro-OMe.HCl	C₇H₁₄ClNO₂	Molecular Weight:179.645 Density:N/A Boiling Point:N/A Melting Point:N/A	18650-38-9