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
2-Pyridinecarbonitrile, 5-phenyl-	C₁₂H₈N₂	Molecular Weight:180.20500 Density:1.17g/cm3 Boiling Point:363ºC at 760mmHg Melting Point:93-94 °C	39065-45-7
4-amino-2,6-dinitrotoluene	C₇H₇N₃O₄	Molecular Weight:197.14800 Density:1.497 g/cm3 Boiling Point:382.6ºC at 760 mmHg Melting Point:N/A	19406-51-0
Lucidin	C₁₅H₁₀O₅	Molecular Weight:270.237 Density:1.6±0.1 g/cm3 Boiling Point:585.0±29.0 °C at 760 mmHg Melting Point:330ºC	478-08-0
para-Acetyl-L-phenylalanine	C₁₁H₁₄ClNO₃	Molecular Weight:243.687 Density:1.2±0.1 g/cm3 Boiling Point:396.7±37.0 °C at 760 mmHg Melting Point:N/A	22888-49-9
3-[(E)-[(2,4-dinitrophenyl)hydrazinylidene]methyl]phenol	C₁₃H₁₀N₄O₅	Molecular Weight:302.24200 Density:1.49g/cm3 Boiling Point:526.2ºC at 760mmHg Melting Point:N/A	1160-77-6
2,5-Heptanedione	C₇H₁₂O₂	Molecular Weight:128.16900 Density:0.926 g/cm3 Boiling Point:208.3ºC at 760 mmHg Melting Point:N/A	1703-51-1
heptane-2,6-dione	C₇H₁₂O₂	Molecular Weight:128.16900 Density:0.926g/cm3 Boiling Point:212.5ºC at 760mmHg Melting Point:N/A	13505-34-5
3-(4-HYDROXYPHENYL)-2H-1-BENZOPYRAN-6,7-DIOL	C₁₅H₁₂O₄	Molecular Weight:256.25300 Density:1.439g/cm3 Boiling Point:526.8ºC at 760 mmHg Melting Point:N/A	145917-93-7
3,4,5,2',4'-Pentahydroxychalcone	C₁₅H₁₂O₆	Molecular Weight:288.252 Density:1.6±0.1 g/cm3 Boiling Point:658.1±55.0 °C at 760 mmHg Melting Point:N/A	2679-65-4
5-Methoxy-N-methyl-N-(1-methylethyl)-1H-indole-3-ethanamine	C₁₅H₂₂N₂O	Molecular Weight:246.348 Density:1.1±0.1 g/cm3 Boiling Point:390.3±32.0 °C at 760 mmHg Melting Point:N/A	96096-55-8
1H-Indole-5,6-diol	C₈H₇NO₂	Molecular Weight:149.147 Density:1.5±0.1 g/cm3 Boiling Point:411.2±25.0 °C at 760 mmHg Melting Point:N/A	3131-52-0
BENZOFURAN-2-CARBONITRILE	C₉H₅NO	Molecular Weight:143.14200 Density:1.228g/cm3 Boiling Point:260.846ºC at 760 mmHg Melting Point:N/A	41717-32-2
2-methylacetoacetic acid	C₅H₈O₃	Molecular Weight:116.11500 Density:1.125g/cm3 Boiling Point:227.9ºC at 760mmHg Melting Point:N/A	2382-59-4
N-(5-Fluoro-4-methyl-2-pyridinyl)acetamide	C₈H₉FN₂O	Molecular Weight:168.168 Density:1.2±0.1 g/cm3 Boiling Point:321.4±42.0 °C at 760 mmHg Melting Point:N/A	475060-21-0
6-Methoxy-1,3-benzothiazole-2-carboxylic acid	C₉H₇NO₃S	Molecular Weight:209.222 Density:1.5±0.1 g/cm3 Boiling Point:412.3±37.0 °C at 760 mmHg Melting Point:119-120ºC	946-13-4
4-Chloro-3-iodopyridine	C₅H₃ClIN	Molecular Weight:239.441 Density:2.1±0.1 g/cm3 Boiling Point:248.6±20.0 °C at 760 mmHg Melting Point:69-70ºC	89167-34-0
N-Succinimidyl-S-acetylthioacetate	C₈H₉NO₅S	Molecular Weight:231.226 Density:1.5±0.1 g/cm3 Boiling Point:337.3±44.0 °C at 760 mmHg Melting Point:84-89ºC	76931-93-6
S-Acetylthioacetic Acid	C₄H₆O₃S	Molecular Weight:134.15400 Density:1.337g/cm3 Boiling Point:251.1ºC at 760mmHg Melting Point:N/A	1190-93-8
3-(2-Hydroxypropan-2-yl)phenol	C₉H₁₂O₂	Molecular Weight:152.19000 Density:1.122g/cm3 Boiling Point:288.2ºC at 760 mmHg Melting Point:105-106°C	7765-97-1
3-Pyridyl Diethylcarbamate	C₁₀H₁₄N₂O₂	Molecular Weight:194.23000 Density:1.096g/cm3 Boiling Point:290.6ºC at 760 mmHg Melting Point:N/A	51581-40-9
2-NITRO-ALPHA-[(2,2,2-TRIFLUOROETHOXY)METHYL]-IMIDAZOLE-1-ETHANOL	C₈H₁₀F₃N₃O₄	Molecular Weight:269.17800 Density:1.56g/cm3 Boiling Point:449.1ºC at 760mmHg Melting Point:N/A	21787-91-7
2-(2,2,2-trifluoroethoxymethyl)oxirane	C₅H₇F₃O₂	Molecular Weight:156.10300 Density:1.288g/cm3 Boiling Point:132.7ºC at 760 mmHg Melting Point:N/A	1535-91-7
TETRAHYDRO-5-OXO-2-PHENYLFURAN-3-CARBOXYLIC ACID	C₁₁H₁₀O₄	Molecular Weight:206.19500 Density:1.35g/cm3 Boiling Point:467.5ºC at 760mmHg Melting Point:N/A	13389-88-3
4-HYDROXY-3,5-DIIODOBENZONITRILE BENZOATE	C₁₄H₇I₂NO₂	Molecular Weight:475.02000 Density:N/A Boiling Point:N/A Melting Point:N/A	3861-43-6
Ethyl carbamimidate hydrochloride	C₃H₉ClN₂O	Molecular Weight:124.569 Density:N/A Boiling Point:95.3ºC at 760mmHg Melting Point:N/A	31407-74-6
4-Propyl-pyridin-2-ylamine	C₈H₁₂N₂	Molecular Weight:136.19400 Density:1.014 g/cm3 Boiling Point:257.4ºC at 760 mmHg Melting Point:N/A	61702-15-6
(2-PHENOXYETHYL)(TRIPHENYL)PHOSPHONIUMBROMIDE	C₁₄H₁₁NO	Molecular Weight:209.24300 Density:1.203g/cm3 Boiling Point:397.163ºC at 760 mmHg Melting Point:N/A	77084-15-2
2-methyl-1-benzofuran-5-amine	C₉H₉NO	Molecular Weight:147.17400 Density:1.178g/cm3 Boiling Point:282.9ºC at 760mmHg Melting Point:N/A	26210-75-3
7-Benzofurancarboxylicacid, 2-methyl-	C₁₀H₈O₃	Molecular Weight:176.16900 Density:1.303g/cm3 Boiling Point:342.7ºC at 760mmHg Melting Point:N/A	31457-07-5
(2-PHENOXYETHYLTHIO)ACETICACIDHYDRAZIDE	C₁₄H₁₁NO	Molecular Weight:209.24300 Density:1.203g/cm3 Boiling Point:397.163ºC at 760 mmHg Melting Point:N/A	77083-99-9
7-Methoxy-2,3-dimethyl-4-nitrobenzofuran	C₁₁H₁₁NO₄	Molecular Weight:221.20900 Density:1.265g/cm3 Boiling Point:373.8ºC at 760mmHg Melting Point:N/A	15868-62-9
3-methyl-1-benzofuran-5-carboxylic acid	C₁₀H₈O₃	Molecular Weight:176.16900 Density:1.303g/cm3 Boiling Point:346ºC at 760 mmHg Melting Point:N/A	501892-99-5
2,3-dimethyl-1-benzofuran-5-carboxylic acid	C₁₁H₁₀O₃	Molecular Weight:190.19500 Density:1.256g/cm3 Boiling Point:368.7ºC at 760mmHg Melting Point:N/A	3781-93-9
N-(2-chloro-1-benzofuran-3-yl)acetamide	C₁₀H₈ClNO₂	Molecular Weight:209.62900 Density:1.384g/cm3 Boiling Point:391.2ºC at 760 mmHg Melting Point:N/A	67382-11-0
2-Oxo-7-indolinecarboxylic acid	C₉H₇NO₃	Molecular Weight:177.157 Density:1.4±0.1 g/cm3 Boiling Point:445.0±45.0 °C at 760 mmHg Melting Point:N/A	25369-43-1
ethyl 2-(methylcarbamoyl)pyridine-4-carboxylate	C₁₀H₁₂N₂O₃	Molecular Weight:208.21400 Density:1.173g/cm3 Boiling Point:371.4ºC at 760mmHg Melting Point:N/A	332013-42-0
2,4,6-Trimethoxy-5-nitropyrimidine	C₇H₉N₃O₅	Molecular Weight:215.16300 Density:1.347g/cm3 Boiling Point:407.959ºC at 760 mmHg Melting Point:N/A	83356-02-9
6-Chloro-2-cyano-3-nitropyridine	C₆H₂ClN₃O₂	Molecular Weight:183.552 Density:1.6±0.1 g/cm3 Boiling Point:347.2±42.0 °C at 760 mmHg Melting Point:N/A	93683-65-9
dehydro-ar-ionene	C₁₃H₁₆	Molecular Weight:172.266 Density:0.9±0.1 g/cm3 Boiling Point:242.2±30.0 °C at 760 mmHg Melting Point:N/A	30364-38-6
(-)-(1S,4R)-N-FMOC-4-AMINOCYCLOPENT-2-ENECARBOXYLICACID	C₁₁H₁₇NO₂	Molecular Weight:195.25800 Density:N/A Boiling Point:N/A Melting Point:N/A	137588-59-1
2-DIMETHYLAMINO-7-NITROFLUORENE	C₁₅H₁₄N₂O₂	Molecular Weight:254.28400 Density:1.283g/cm3 Boiling Point:440.1ºC at 760mmHg Melting Point:N/A	19221-04-6
1-METHYL-5-NITROINDOLINE	C₉H₁₀N₂O₂	Molecular Weight:178.18800 Density:1.259g/cm3 Boiling Point:334.7ºC at 760mmHg Melting Point:N/A	18711-25-6
ETHYL 5-CYANONICOTINATE	C₉H₈N₂O₂	Molecular Weight:176.17200 Density:1.21g/cm3 Boiling Point:283.8ºC at 760mmHg Melting Point:88 °C	90417-31-5
6-(Trifluoromethyl)picolinic acid	C₇H₄F₃NO₂	Molecular Weight:191.107 Density:1.5±0.1 g/cm3 Boiling Point:263.0±40.0 °C at 760 mmHg Melting Point:154-158 °C	131747-42-7
4-N-PROPYLPYRIDINE-2-CARBOXYLIC ACID	C₉H₁₁NO₂	Molecular Weight:165.18900 Density:1.143g/cm3 Boiling Point:327.5ºC at 760 mmHg Melting Point:N/A	87999-87-9
4-butylpyridine-2-carboxylic acid	C₁₀H₁₃NO₂	Molecular Weight:179.21600 Density:1.113 g/cm3 Boiling Point:338.6ºC at 760 mmHg Melting Point:N/A	83282-39-7
4-(4-MORPHOLINYL)-PICOLINIC ACID	C₁₀H₁₂N₂O₃	Molecular Weight:208.21400 Density:1.313g/cm3 Boiling Point:454.1ºC at 760 mmHg Melting Point:N/A	66933-68-4
3,5-Dibromopicolinic acid	C₆H₃Br₂NO₂	Molecular Weight:280.901 Density:2.2±0.1 g/cm3 Boiling Point:337.6±42.0 °C at 760 mmHg Melting Point:N/A	61830-40-8
4-tert-butylpyridine-2-carboxylic acid	C₁₀H₁₃NO₂	Molecular Weight:179.21600 Density:1.107g/cm3 Boiling Point:321.3ºC at 760 mmHg Melting Point:N/A	42205-74-3
4-Methoxy-2-pyridinecarboxylic acid	C₇H₇NO₃	Molecular Weight:153.135 Density:1.3±0.1 g/cm3 Boiling Point:331.0±22.0 °C at 760 mmHg Melting Point:197-198ºC	29082-91-5