CAS号是公开的化学物质信息的最权威的集合。CAS号涵盖从1957年至今的科学文献中确定的物质,其他物质可追溯到20世纪初。它也称CAS编号(CAS Registry Number,或称CAS Number,CAS Rn,CAS #),又称CAS登录号或CAS登记号码,是某种物质(化合物、高分子材料、生物序列(Biological sequences)、混合物或合金)的唯一的数字识别号码。美国化学会的下设组织化学文摘社(Chemical Abstracts Service,简称CAS)负责为每一种出现在文献中的物质分配一个CAS编号,其目的是为了避免化学物质有多种名称的麻烦,使数据库的检索更为方便。如今几乎所有的化学数据库都允许用CAS编号检索。
名称 |
英文名 |
物理化学性质 |
CAS号 |
分子式 |
2-氯-5-硝基苯甲酰胺 |
Benzamide,2-chloro-5-nitro- |
分子量:200.57900 密度:1.52 g/cm3 沸点:299ºC at 760 mmHg 熔点:178 °C |
16588-15-1 |
C7H5ClN2O3 |
6-(叔丁基)-2-氯-3-氰基异烟酸乙酯 |
ETHYL 6-(TERT-BUTYL)-2-CHLORO-3-CYANOISONICOTINATE |
分子量:266.72300 密度:1.2g/cm3 沸点:387.7ºC at 760mmHg 熔点:N/A |
175204-47-4 |
C13H15ClN2O2 |
1-(二氟甲氧基)-2-硝基苯 |
1-(Difluoromethoxy)-2-nitrobenzene |
分子量:189.116 密度:1.4±0.1 g/cm3 沸点:249.4±30.0 °C at 760 mmHg 熔点:N/A |
22225-77-0 |
C7H5F2NO3 |
6-溴-1-(氯甲基)-2-甲氧基萘 |
6-BROMO-1-(CHLOROMETHYL)-2-METHOXYNAPHTHALENE |
分子量:285.56400 密度:1.491g/cm3 沸点:379.5ºC at 760mmHg 熔点:144ºC |
92643-16-8 |
C12H10BrClO |
4-甲醛-N-甲基吡咯-2-甲酸甲酯 |
Methyl 4-formyl-1-methyl-1H-pyrrole-2-carboxylate |
分子量:167.162 密度:1.2±0.1 g/cm3 沸点:293.1±25.0 °C at 760 mmHg 熔点:100ºC |
67858-47-3 |
C8H9NO3 |
3-(1-四氢吡咯基)苯甲酸 |
3-(1-Pyrrolidinyl)benzoic acid |
分子量:191.226 密度:1.2±0.1 g/cm3 沸点:384.1±25.0 °C at 760 mmHg 熔点:215 ℃ |
72548-79-9 |
C11H13NO2 |
3-(1H-吡唑-1-基甲基)苯甲酸 |
3-(1H-PYRAZOL-1-YLMETHYL)BENZOIC ACID |
分子量:202.20900 密度:1.24g/cm3 沸点:426.1ºC at 760 mmHg 熔点:151ºC |
562803-68-3 |
C11H10N2O2 |
4-(三氟甲基)烟酰胺 |
4-(TRIFLUOROMETHYL)-3-PYRIDINECARBOTHIOAMIDE |
分子量:206.18800 密度:1.484g/cm3 沸点:290.4ºC at 760mmHg 熔点:153ºC |
158063-54-8 |
C7H5F3N2S |
苯并[c][1,2,5]恶二唑-4-基甲醇 |
2,1,3-BENZOXADIAZOL-4-YLMETHANOL |
分子量:150.13500 密度:1.408g/cm3 沸点:300.1ºC at 760mmHg 熔点:71ºC |
175609-19-5 |
C7H6N2O2 |
[3-(1H-1,2,4-噻唑-1-甲基)苯基]甲醇 |
[3-(1H-1,2,4-TRIAZOL-1-YLMETHYL)PHENYL]METHANOL |
分子量:189.21400 密度:1.22g/cm3 沸点:411.9ºC at 760 mmHg 熔点:56ºC |
871825-54-6 |
C10H11N3O |
5,6-二苯基-2,3-二羟基吡嗪 |
Pyrazine,2,3-dihydro-5,6-diphenyl- |
分子量:234.29600 密度:1.09g/cm3 沸点:382.9ºC at 760mmHg 熔点:160ºC |
1489-06-1 |
C16H14N2 |
4-异氰基-5-甲基-1-苯基-吡唑 |
4-ISOCYANATO-5-METHYL-1-PHENYL-1H-PYRAZOLE |
分子量:199.20900 密度:1.17g/cm3 沸点:314.4ºC at 760 mmHg 熔点:56-60ºC |
799283-97-9 |
C11H9N3O |
2-乙酰基-3-氨基-5-苯基噻吩 |
2-Acetyl-3-amino-5-phenylthiophene |
分子量:217.287 密度:1.2±0.1 g/cm3 沸点:446.7±45.0 °C at 760 mmHg 熔点:135 °C |
105707-24-2 |
C12H11NOS |
2-(4-甲氧苯氧基)-3-硝基吡啶 |
2-(4-methoxyphenoxy)-3-nitropyridine |
分子量:246.21900 密度:1.302 g/cm3 沸点:368.8ºCat 760 mmHg 熔点:95ºC |
76893-48-6 |
C12H10N2O4 |
1,2-二氯-4-(2,2-二乙氧基乙氧基)苯 |
1,2-dichloro-4-(2,2-diethoxyethoxy)benzene |
分子量:279.16000 密度:1.198g/cm3 沸点:352.1ºC at 760mmHg 熔点:N/A |
98919-15-4 |
C12H16Cl2O3 |
3-甲基-2-丁烯甲酸盐 |
prenyl formate |
分子量:114.14200 密度:0.915g/cm3 沸点:139.6ºC at 760mmHg 熔点:N/A |
68480-28-4 |
C6H10O2 |
1-甲基环丙烷-1-甲酸乙酯 |
Ethyl 1-methylcyclopropanecarboxylate |
分子量:128.169 密度:1.0±0.1 g/cm3 沸点:140.7±8.0 °C at 760 mmHg 熔点:N/A |
71441-76-4 |
C7H12O2 |
2-氯-3,4-二甲氧基苯甲酸 |
2-CHLORO-3,4-DIMETHOXYBENZOIC ACID |
分子量:216.618 密度:1.3±0.1 g/cm3 沸点:324.2±37.0 °C at 760 mmHg 熔点:200-204ºC(lit.) |
52009-53-7 |
C9H9ClO4 |
4-甲基硫代-6-哌啶-1,3,5-三嗪-2-胺 |
4-methylsulfanyl-6-piperidin-1-yl-1,3,5-triazin-2-amine |
分子量:225.31400 密度:1.3g/cm3 沸点:463.6ºC at 760mmHg 熔点:156ºC |
101071-66-3 |
C9H15N5S |
1-[2-(4-氯苯基)-7-甲基吡唑并[1,5-a]嘧啶-6-基]-1-乙酮 |
1-[2-(4-CHLOROPHENYL)-7-METHYLPYRAZOLO[1,5-A]PYRIMIDIN-6-YL]ETHAN-1-ONE |
分子量:285.72800 密度:1.33g/cm3 沸点:N/A 熔点:181ºC |
175201-63-5 |
C15H12ClN3O |
4-氨基-2-(4-甲基苯基)-6-甲基硫代嘧啶-5-甲腈 |
4-AMINO-2-(4-METHYLPHENYL)-6-(METHYLTHIO)PYRIMIDINE-5-CARBONITRILE |
分子量:256.32600 密度:1.31g/cm3 沸点:364.9ºC at 760 mmHg 熔点:213ºC |
287922-40-1 |
C13H12N4S |
3-氯-4-甲基-2-噻吩羰酰氯 |
3-CHLORO-4-METHYL-2-THIOPHENECARBONYLCHLORIDE |
分子量:195.06600 密度:1.46g/cm3 沸点:267.5ºC at 760 mmHg 熔点:N/A |
690632-13-4 |
C6H4Cl2OS |
2-氯-5-异氰基吡啶 |
2-chloro-5-isocyanatopyridine |
分子量:154.55400 密度:1.32g/cm3 沸点:76ºC 熔点:N/A |
125117-96-6 |
C6H3ClN2O |
4-(4-苄基哌嗪)-1H-吲哚双盐酸盐水合物 |
4-(4-benzylpiperazino)-1h-indole dihydrochloride monohydrate |
分子量:382.32700 密度:N/A 沸点:480.7ºC at 760 mmHg 熔点:220ºC |
690632-86-1 |
C19H25Cl2N3O |
5-(2-甲基-1,3-噻唑-4-基)-2-噻吩羰酰氯 |
5-(2-METHYL-1,3-THIAZOL-4-YL)-2-THIOPHENECARBONYL CHLORIDE |
分子量:243.73300 密度:1.437g/cm3 沸点:384.5ºC at 760 mmHg 熔点:107.5ºC |
690631-93-7 |
C9H6ClNOS2 |
5-(氯甲基)-1-甲基-3-苯基-1H-吡唑 |
5-(CHLOROMETHYL)-1-METHYL-3-PHENYL-1H-PYRAZOLE |
分子量:206.67100 密度:1.17g/cm3 沸点:338.1ºC at 760 mmHg 熔点:70ºC |
869901-14-4 |
C11H11ClN2 |
2-(2-甲基噻唑-4-基)乙酸 |
(2-Methyl-1,3-Thiazol-4-Yl)Acetic Acid |
分子量:157.19000 密度:1.356g/cm3 沸点:304.9ºC at 760mmHg 熔点:125-126 °C |
13797-62-1 |
C6H7NO2S |
吡咯烷-1-羰酰亚胺盐酸盐 |
Pyrrolidine-1-carboximidamide hydroiodide |
分子量:241.07300 密度:N/A 沸点:N/A 熔点:190ºC |
102392-83-6 |
C5H12IN3 |
2-溴-5-(异恶唑-5-基)噻吩 |
2-BROMO-5-(ISOXAZOL-5-YL)THIOPHENE |
分子量:230.08200 密度:1.686g/cm3 沸点:311.8ºC at 760 mmHg 熔点:N/A |
138716-31-1 |
C7H4BrNOS |
2-(乙胺基)-1,3,4-噻二唑 |
1,3,4-Thiadiazol-2-amine,N-ethyl- |
分子量:129.18300 密度:1.268g/cm3 沸点:253.9ºC at 760mmHg 熔点:N/A |
13275-68-8 |
C4H7N3S |
3-(4-甲氧基苯基)-5-甲基-4-异恶唑羰酰氯 |
3-(4-methoxyphenyl)-5-methyl-1,2-oxazole-4-carbonyl chloride |
分子量:251.66600 密度:1.274g/cm3 沸点:405.8ºC at 760 mmHg 熔点:79ºC |
465514-03-8 |
C12H10ClNO3 |
3-(5-溴-2-甲基-4-硝基-1H-咪唑)丙腈 |
3-(5-bromo-2-methyl-4-nitroimidazol-1-yl)propanenitrile |
分子量:259.06000 密度:1.77g/cm3 沸点:445.6ºC at 760mmHg 熔点:152-155ºC |
139975-78-3 |
C7H7BrN4O2 |
1-[2-[4-(三氟甲基)苯基]-1,3-噻唑-4-基]-1-乙酮 |
1-(2-[4-(TRIFLUOROMETHYL)PHENYL]-1,3-THIAZOL-4-YL)ETHAN-1-ONE |
分子量:271.25800 密度:1.339g/cm3 沸点:350.5ºC at 760mmHg 熔点:66ºC |
263564-37-0 |
C12H8F3NOS |
1-甲基吲唑-3-甲胺 |
(1-Methyl-1H-indazol-3-yl)methanamine |
分子量:161.20400 密度:1.224g/cm3 沸点:312.451ºC at 760 mmHg 熔点:55ºC |
739359-10-5 |
C9H11N3 |
3-[4-(三氟甲基)苯基]-1H-吡唑-4-甲醛 |
3-[4-(TRIFLUOROMETHYL)PHENYL]-1H-PYRAZOLE-4-CARBALDEHYDE |
分子量:240.18100 密度:1.11g/cm3 沸点:422.7ºC at 760mmHg 熔点:113ºC |
306936-65-2 |
C11H7F3N2O |
4-氯-5-(1-甲基肼基)-2-苯基-2,3-二氢哒嗪-3-酮 |
5-[amino(methyl)amino]-4-chloro-2-phenylpyridazin-3-one |
分子量:250.68400 密度:1.38g/cm3 沸点:351.7ºC at 760 mmHg 熔点:127ºC |
41932-99-4 |
C11H11ClN4O |
N-2-甲基-3-氨基-4-溴吡唑 |
3-Amino-4-bromo-1-methyl-1H-pyrazole |
分子量:176.01500 密度:1.91g/cm3 沸点:274.6ºC at 760mmHg 熔点:90ºC |
146941-72-2 |
C4H6BrN3 |
3-(1H-1,2,4-噻唑-1-甲基)苯甲醛 |
3-(1H-1,2,4-TRIAZOL-1-YLMETHYL)BENZALDEHYDE |
分子量:187.19800 密度:1.21g/cm3 沸点:397.4ºC at 760 mmHg 熔点:54ºC |
876316-30-2 |
C10H9N3O |
4-氯-2-(2,4-二氯苯基)-5-(1-甲基肼基)-2,3-二氢哒嗪-3-酮 |
4-CHLORO-2-(2,4-DICHLOROPHENYL)-5-(1-METHYLHYDRAZINO)-2,3-DIHYDROPYRIDAZIN-3-ONE |
分子量:319.57400 密度:1.59g/cm3 沸点:418.7ºC at 760 mmHg 熔点:N/A |
175135-85-0 |
C11H9Cl3N4O |
4-(5,5-二甲基-1,3-二噁烷)哌啶草酸盐 |
4-(5,5-dimethyl-1,3-dioxan-2-yl)piperidine oxalate |
分子量:289.32500 密度:N/A 沸点:273ºC at 760 mmHg 熔点:204ºC |
423768-60-9 |
C13H23NO6 |
1-[3-氨基-5-(4-氯苯基)-2-噻吩基]乙烷-1-酮 |
1-[3-AMINO-5-(4-CHLOROPHENYL)-2-THIENYL]ETHAN-1-ONE |
分子量:251.73200 密度:1.325g/cm3 沸点:475.5ºC at 760mmHg 熔点:138ºC |
175137-02-7 |
C12H10ClNOS |
4-氰基-5-(甲基硫代)-3-[3-(三氟甲基)苯基]噻吩-2-羧酸 |
4-CYANO-5-(METHYLTHIO)-3-[3-(TRIFLUOROMETHYL)PHENYL]THIOPHENE-2-CARBOXYLIC ACID |
分子量:343.34400 密度:1.54g/cm3 沸点:437.5ºC at 760mmHg 熔点:N/A |
116492-99-0 |
C14H8F3NO2S2 |
4-(硫代甲基)-6-(3-吡啶)-1,3,5-三嗪-2-胺 |
4-methylsulfanyl-6-pyridin-3-yl-1,3,5-triazin-2-amine |
分子量:219.26600 密度:1.41g/cm3 沸点:518.2ºC at 760 mmHg 熔点:243ºC |
175204-62-3 |
C9H9N5S |
4-[(4-甲基苯基)硫基]-3-硝基苯甲醛 |
4-[(4-METHYLPHENYL)THIO]-3-NITROBENZALDEHYDE |
分子量:273.30700 密度:1.33g/cm3 沸点:424.8ºC at 760mmHg 熔点:138ºC |
270262-89-0 |
C14H11NO3S |
3-溴噻吩-2-甲酰氯 |
3-BROMOTHIOPHENE-2-CARBONYL CHLORIDE |
分子量:225.49100 密度:1.855 g/cm3 沸点:257.2ºC at 760 mmHg 熔点:65-68ºC |
25796-68-3 |
C5H2BrClOS |
2-(4-氯苯氧基)-3-硝基吡啶 |
2-(4-chlorophenoxy)-3-nitropyridine |
分子量:250.63800 密度:1.415g/cm3 沸点:359.2ºC at 760 mmHg 熔点:89ºC |
76893-45-3 |
C11H7ClN2O3 |
2-氯甲基-5-(4-甲基苯基)-1,3,4-恶二唑 |
2-chloromethyl-5-(4-methylphenyl)-1,3,4-oxadiazole |
分子量:208.64400 密度:1.242g/cm3 沸点:327.8ºC at 760mmHg 熔点:117-119°C |
287197-95-9 |
C10H9ClN2O |
1-[5-(2,4,6-三氯苯基)-2-呋喃基]-1-乙酮 |
1-[5-(2,4,6-TRICHLOROPHENYL)-2-FURYL]ETHAN-1-ONE |
分子量:289.54200 密度:1.413g/cm3 沸点:379.3ºC at 760 mmHg 熔点:107.5ºC |
671192-08-8 |
C12H7Cl3O2 |
4-[(4-氯苯基)硫代]噻吩-3-羧酸 |
4-[(4-CHLOROPHENYL)THIO]THIOPHENE-3-CARBOXYLIC ACID |
分子量:270.75500 密度:1.53g/cm3 沸点:432.7ºC at 760mmHg 熔点:N/A |
149609-86-9 |
C11H7ClO2S2 |
3-氨基羰基-1H-吲哚-5-氯化铵 |
3-(AMINOCARBONYL)-1H-INDOL-5-AMINIUM CHLORIDE |
分子量:211.64800 密度:N/A 沸点:556.9ºC at 760mmHg 熔点:296ºC |
306936-36-7 |
C9H10ClN3O |