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
4,4'-Thiobisbenzenethiol	C₁₂H₁₀S₃	Molecular Weight:250.403 Density:1.3±0.1 g/cm3 Boiling Point:431.2±30.0 °C at 760 mmHg Melting Point:112-114 °C(lit.)	19362-77-7
p-methylthioanisole	C₈H₁₀OS	Molecular Weight:154.229 Density:1.1±0.1 g/cm3 Boiling Point:253.4±0.0 °C at 760 mmHg Melting Point:22-23 °C	1879-16-9
Bis(3-chlorophenyl) disulfide	C₁₂H₈Cl₂S₂	Molecular Weight:287.228 Density:1.4±0.1 g/cm3 Boiling Point:373.4±27.0 °C at 760 mmHg Melting Point:N/A	19742-92-8
2,4-Difluorothiophenol	C₆H₄F₂S	Molecular Weight:146.158 Density:1.3±0.1 g/cm3 Boiling Point:155.5±20.0 °C at 760 mmHg Melting Point:N/A	1996-44-7
Mesityl phenyl sulfide	C₁₅H₁₆S	Molecular Weight:228.352 Density:1.1±0.1 g/cm3 Boiling Point:305.7±11.0 °C at 760 mmHg Melting Point:N/A	33667-80-0
3-Chlorothiophenol	C₆H₅ClS	Molecular Weight:144.622 Density:1.3±0.1 g/cm3 Boiling Point:206.8±13.0 °C at 760 mmHg Melting Point:N/A	2037-31-2
2,2′-Dipyridyl disulfide	C₁₀H₈N₂S₂	Molecular Weight:220.31 Density:1.3±0.1 g/cm3 Boiling Point:356.1±17.0 °C at 760 mmHg Melting Point:56-58 °C(lit.)	2127-03-9
Bis(pentachlorophenyl) disulfide	C₁₂Cl₁₀S₂	Molecular Weight:562.788 Density:2.0±0.1 g/cm3 Boiling Point:539.2±50.0 °C at 760 mmHg Melting Point:N/A	22441-21-0
3-Fluorothiophenol	C₆H₅FS	Molecular Weight:128.167 Density:1.2±0.1 g/cm3 Boiling Point:162.7±13.0 °C at 760 mmHg Melting Point:N/A	2557-77-9
2-methylthioaniline	C₇H₉NS	Molecular Weight:139.218 Density:1.1±0.1 g/cm3 Boiling Point:234.7±13.0 °C at 760 mmHg Melting Point:N/A	2987-53-3
2-(1,1-Dimethyl-propyl)-anthraquinone	C₁₉H₁₈O₂	Molecular Weight:278.345 Density:1.1±0.1 g/cm3 Boiling Point:432.9±35.0 °C at 760 mmHg Melting Point:60-65ºC	32588-54-8
3-Bromo-2-chlorothiophene	C₄H₂BrClS	Molecular Weight:197.481 Density:1.8±0.1 g/cm3 Boiling Point:197.3±20.0 °C at 760 mmHg Melting Point:N/A	40032-73-3
2,5-Dichlorothiophene	C₄H₂Cl₂S	Molecular Weight:153.030 Density:1.5±0.1 g/cm3 Boiling Point:158.9±20.0 °C at 760 mmHg Melting Point:-41--40°C	3172-52-9
2-Nitrodiphenyl sulfone	C₁₂H₉NO₄S	Molecular Weight:263.269 Density:1.4±0.1 g/cm3 Boiling Point:462.3±28.0 °C at 760 mmHg Melting Point:145-148 °C(lit.)	31515-43-2
Bis(4-chlorophenyl) sulfoxide	C₁₂H₈Cl₂OS	Molecular Weight:271.162 Density:1.5±0.1 g/cm3 Boiling Point:406.2±30.0 °C at 760 mmHg Melting Point:141-144 °C(lit.)	3085-42-5
3-Methyl-4-methylthiophenol	C₈H₁₀OS	Molecular Weight:154.229 Density:1.2±0.1 g/cm3 Boiling Point:263.5±33.0 °C at 760 mmHg Melting Point:56-60°C	3120-74-9
Methyl phenyl sulfone	C₇H₈O₂S	Molecular Weight:156.202 Density:1.2±0.1 g/cm3 Boiling Point:302.6±15.0 °C at 760 mmHg Melting Point:85-87 °C	3112-85-4
2-Iodothiophene	C₄H₃IS	Molecular Weight:210.036 Density:2.1±0.1 g/cm3 Boiling Point:181.8±13.0 °C at 760 mmHg Melting Point:−40 °C(lit.)	3437-95-4
3-Bromophenyl methyl sulfone	C₇H₇BrO₂S	Molecular Weight:235.098 Density:1.6±0.1 g/cm3 Boiling Point:362.8±34.0 °C at 760 mmHg Melting Point:100-104ºC	34896-80-5
4-Bromophenyl methyl sulfone	C₇H₇BrO₂S	Molecular Weight:235.098 Density:1.6±0.1 g/cm3 Boiling Point:348.6±34.0 °C at 760 mmHg Melting Point:103-107 °C(lit.)	3466-32-8
1,4-Dibromo-2-nitrobenzene	C₆H₃Br₂NO₂	Molecular Weight:280.901 Density:2.1±0.1 g/cm3 Boiling Point:266.4±20.0 °C at 760 mmHg Melting Point:82-84 °C(lit.)	3460-18-2
3,5-dibromopyridin-2-amine	C₅H₄Br₂N₂	Molecular Weight:251.907 Density:2.1±0.1 g/cm3 Boiling Point:253.9±35.0 °C at 760 mmHg Melting Point:104-105 °C(lit.)	35486-42-1
4-Fluoro thioanisole	C₇H₇FS	Molecular Weight:142.194 Density:1.1±0.1 g/cm3 Boiling Point:184.8±23.0 °C at 760 mmHg Melting Point:N/A	371-15-3
2-[(4-Chlorophenyl)thio]aniline	C₁₂H₁₀ClNS	Molecular Weight:235.732 Density:1.3±0.1 g/cm3 Boiling Point:371.6±27.0 °C at 760 mmHg Melting Point:32℃(Solv:ethanol(64-17-5);water(7732-18-5))	37750-29-1
4-Methylphenyl phenyl sulfide	C₁₃H₁₂S	Molecular Weight:200.299 Density:1.1±0.1 g/cm3 Boiling Point:317.6±11.0 °C at 760 mmHg Melting Point:16 °C	3699-01-2
4-Hydroxy-2,2,6,6-tetramethyl-piperidinooxy sebacate	C₂₈H₅₀N₂O₆	Molecular Weight:510.706 Density:N/A Boiling Point:523.5ºC at 760 mmHg Melting Point:101 °C	2516-92-9
2-Chlorothiosanisole	C₇H₇ClS	Molecular Weight:158.648 Density:1.2±0.1 g/cm3 Boiling Point:211.1±23.0 °C at 760 mmHg Melting Point:N/A	39718-00-8
2,5-DIMETHYLTHIOPHENOL	C₈H₁₀S	Molecular Weight:138.230 Density:1.0±0.1 g/cm3 Boiling Point:205.0±0.0 °C at 760 mmHg Melting Point:15 °C	4001-61-0
4-Mercaptophenol	C₆H₆OS	Molecular Weight:126.176 Density:1.3±0.1 g/cm3 Boiling Point:256.3±23.0 °C at 760 mmHg Melting Point:16-17 °C(lit.)	40248-84-8
Methyl 2-benzoylbenzoate	C₁₅H₁₂O₃	Molecular Weight:240.254 Density:1.2±0.1 g/cm3 Boiling Point:351.5±15.0 °C at 760 mmHg Melting Point:48-53 °C(lit.)	606-28-0
2-Bromo-1-[4-(methylsulfonyl)phenyl]ethanone	C₉H₉BrO₃S	Molecular Weight:277.135 Density:1.6±0.1 g/cm3 Boiling Point:428.4±41.0 °C at 760 mmHg Melting Point:126 °C	50413-24-6
2-Aminothiophenol	C₆H₇NS	Molecular Weight:125.191 Density:1.2±0.1 g/cm3 Boiling Point:234.9±13.0 °C at 760 mmHg Melting Point:23 °C	137-07-5
4-Isopropylthiophenol	C₉H₁₂S	Molecular Weight:152.257 Density:1.0±0.1 g/cm3 Boiling Point:215.1±19.0 °C at 760 mmHg Melting Point:N/A	4946-14-9
2-Methylbenzothiazole	C₈H₇NS	Molecular Weight:149.213 Density:1.2±0.1 g/cm3 Boiling Point:238.0±9.0 °C at 760 mmHg Melting Point:11-14 °C(lit.)	120-75-2
Diphenyl(2,4,6-trimethylbenzoyl)phosphine oxide	C₂₂H₂₁O₂P	Molecular Weight:348.375 Density:1.2±0.1 g/cm3 Boiling Point:519.6±60.0 °C at 760 mmHg Melting Point:88-92 °C(lit.)	75980-60-8
2-Aminodiphenylsulfone	C₁₂H₁₁NO₂S	Molecular Weight:233.286 Density:1.3±0.1 g/cm3 Boiling Point:439.6±28.0 °C at 760 mmHg Melting Point:120-122 °C(lit.)	4273-98-7
2-Picolinic acid	C₆H₅NO₂	Molecular Weight:123.109 Density:1.3±0.1 g/cm3 Boiling Point:292.5±13.0 °C at 760 mmHg Melting Point:139-142 °C(lit.)	98-98-6
2-Chlorobenzophenone	C₁₃H₉ClO	Molecular Weight:216.66 Density:1.2±0.1 g/cm3 Boiling Point:330.6±15.0 °C at 760 mmHg Melting Point:44-47 °C(lit.)	5162-03-8
10,11-Dihydrocarbamazepine	C₁₅H₁₄N₂O	Molecular Weight:238.28 Density:1.2±0.1 g/cm3 Boiling Point:394.5±52.0 °C at 760 mmHg Melting Point:205-210ºC	3564-73-6
UNII:JR71SUM5E9	C₆H₁₂O₂	Molecular Weight:116.158 Density:1.0±0.1 g/cm3 Boiling Point:183.9±8.0 °C at 760 mmHg Melting Point:187°C	100-72-1
1,1,2-trifluorobut-1-ene	C₄H₅F₃	Molecular Weight:110.07800 Density:1.057g/cm3 Boiling Point:29.2ºC at 760mmHg Melting Point:N/A	383-84-6
1-(4-BROMO-BENZOYL)-PIPERIDIN-4-ONE	C₁₀H₁₂Br₂O	Molecular Weight:308.01000 Density:1.601g/cm3 Boiling Point:336.7ºC at 760mmHg Melting Point:N/A	105212-11-1
5,5,8,8-TETRAMETHYL-5,6,7,8-TETRAHYDRONAPHTHALENE-2-CARBOXYLIC ACID	C₁₅H₂₀O₂	Molecular Weight:232.31800 Density:1.029g/cm3 Boiling Point:346.1ºC at 760mmHg Melting Point:197ºC	103031-30-7
1,2-BIS(TERT-BUTYLTHIO)ETHANE:DIBORANE COMPLEX	C₁₀H₂₆B₂S₂	Molecular Weight:232.065 Density:N/A Boiling Point:269.8ºC at 760 mmHg Melting Point:-77ºC (dec.)	71522-78-6
Cyclotrimethylene Dichlorosilane	C₃H₆Cl₂Si	Molecular Weight:141.07100 Density:1.19g/cm3 Boiling Point:113-115ºC(lit.) Melting Point:<0ºC	2351-33-9
3-ethylpent-1-yn-3-amine	C₇H₁₃N	Molecular Weight:111.18500 Density:0.845 g/cm3 Boiling Point:132.7ºC at 760 mmHg Melting Point:N/A	3234-64-8
Sterigmatocystine	C₁₈H₁₂O₆	Molecular Weight:324.284 Density:1.5±0.1 g/cm3 Boiling Point:569.7±50.0 °C at 760 mmHg Melting Point:246ºC with decomp	10048-13-2
(-)-3-OXO-6-BETA-TRITYLOXYMETHYL-7-ALPHA-BENZOYL-OXY-2-OXABICYCLO[3.3.0!OCTANE	C₃₄H₃₀O₅	Molecular Weight:518.59900 Density:1.27g/cm3 Boiling Point:660ºC at 760mmHg Melting Point:181-185ºC	101208-17-7
1,2-aceanthrylenedione	C₁₆H₈O₂	Molecular Weight:232.23400 Density:1.433g/cm3 Boiling Point:462.6ºC at 760 mmHg Melting Point:270-273ºC(lit.)	6373-11-1
1,2-Ethanediamine,N1,N1-diethyl-N2-methyl-	C₇H₁₈N₂	Molecular Weight:130.23100 Density:0.805 g/mL at 25 °C(lit.) Boiling Point:157-160 °C(lit.) Melting Point:N/A	104-79-0