26421-32-9

• 常用中文名：2,5-二甲基噻吩-3-羧酸
• 常用英文名：2,5-dimethylthiophene-3-carboxylic acid
• CAS号：26421-32-9
• 分子式：C₇H₈O₂S
• 分子量：156.20200
• 相关类别： 医药中间体 杂环化合物 噻吩类化合物
• 发布时间：2018-04-08 08:00:00
• 更新时间：2024-01-14 19:22:53
• 下载msds

名称

• 中文名: 2,5-二甲基噻吩-3-羧酸
• 英文名: 2,5-dimethylthiophene-3-carboxylic acid
• 英文别名: 2,5-dimethyl-3-thiophenecarboxylic acid; 3-(Carboxy)-2,5-dimethylthiophene; 2,5-dimethyl-3-thenoic acid; 2,5-Dimethyl-thiophen-3-carbonsaeure; 2,5-Dimethyl-3-thiophencarboxylsaeure; 2,5-Dimethyl-3-thiophencarbonsaeure; 2,5-dimethyl-thiophene-3-carboxylic acid; 2,5-Dmethylthiophene-3-carboxylic acid

物化性质

• 密度: 1.259g/cm3
• 沸点: 278.8ºC at 760mmHg
• 分子式: C₇H₈O₂S
• 分子量: 156.20200
• 闪点: 122.4ºC
• 精确质量: 156.02500
• PSA: 65.54000
• LogP: 2.06310
• 蒸汽压: 0.00199mmHg at 25°C
• 折射率: 1.579
• 储存条件: 室温

MSDS

Material Safety Data Sheet Section1. Identification of the substance Product Name: 2,5-Dimethylthiophene-3-carboxylic acid Synonyms: Section2. Hazards identification Harmful by inhalation, in contact with skin, and if swallowed. Section3. Composition/information on ingredients. Ingredient name:2,5-Dimethylthiophene-3-carboxylic acid CAS number:26421-32-9 Section4. First aid measures Skin contact:Immediately wash skin with copious amounts of water for at least 15 minutes while removing contaminated clothing and shoes. If irritation persists, seek medical attention. Eye contact:Immediately wash skin with copious amounts of water for at least 15 minutes. Assure adequate flushing of the eyes by separating the eyelids with fingers. If irritation persists, seek medical attention. Inhalation:Remove to fresh air. In severe cases or if symptoms persist, seek medical attention. Ingestion:Wash out mouth with copious amounts of water for at least 15 minutes. Seek medical attention. Section5. Fire fighting measures In the event of a fire involving this material, alone or in combination with other materials, use dry powder or carbon dioxide extinguishers. Protective clothing and self-contained breathing apparatus should be worn. Section6. Accidental release measures Personal precautions: Wear suitable personal protective equipment which performs satisfactorily and meets local/state/national standards. Respiratory precaution:Wear approved mask/respirator Hand precaution:Wear suitable gloves/gauntlets Skin protection:Wear suitable protective clothing Eye protection:Wear suitable eye protection Methods for cleaning up: Mix with sand or similar inert absorbent material, sweep up and keep in a tightly closed container for disposal. See section 12. Environmental precautions: Do not allow material to enter drains or water courses. Section7. Handling and storage Handling:This product should be handled only by, or under the close supervision of, those properly qualified in the handling and use of potentially hazardous chemicals, who should take into account the fire, health and chemical hazard data given on this sheet. Store in closed vessels. Storage: Section8. Exposure Controls / Personal protection Engineering Controls: Use only in a chemical fume hood. Personal protective equipment: Wear laboratory clothing, chemical-resistant gloves and safety goggles. General hydiene measures: Wash thoroughly after handling. Wash contaminated clothing before reuse. Section9. Physical and chemical properties Appearance:Not specified Boiling point:No data No data Melting point: Flash point:No data Density:No data Molecular formula:C7H8O2S Molecular weight:156.2 Section10. Stability and reactivity Conditions to avoid: Heat, flames and sparks. Materials to avoid: Oxidizing agents. Possible hazardous combustion products: Carbon monoxide, sulfur oxides. Section11. Toxicological information No data. Section12. Ecological information No data. Section13. Disposal consideration Arrange disposal as special waste, by licensed disposal company, in consultation with local waste disposal authority, in accordance with national and regional regulations. Section14. Transportation information Non-harzardous for air and ground transportation. Section15. Regulatory information No chemicals in this material are subject to the reporting requirements of SARA Title III, Section 302, or have known CAS numbers that exceed the threshold reporting levels established by SARA Title III, Section 313. SECTION 16 - ADDITIONAL INFORMATION N/A

安全

• 危害码 (欧洲): Xi: Irritant;
• 风险声明 (欧洲): 36
• 安全声明 (欧洲): 26
• 海关编码: 2934999090

合成路线

26421-44-3 ~66% 26421-32-9

文献：Belen'kii; Gromova; Kolotaev; Nabatov; Krayushkin Russian Chemical Bulletin, 2005 , vol. 54, # 5 p. 1208 - 1213

638-02-8 ~% 26421-32-9

文献：Steinkopf et al. Justus Liebigs Annalen der Chemie, 1938 , vol. 536, p. 128,131

2530-10-1 ~% 26421-32-9

文献：Sprio; Madonia Gazzetta Chimica Italiana, 1957 , vol. 87, p. 454,465

13679-70-4 ~% 26421-32-9

文献：King; Nord Journal of Organic Chemistry, 1949 , vol. 14, p. 638,639

40197-02-2 ~% 26421-32-9

文献：Steinkopf et al. Justus Liebigs Annalen der Chemie, 1938 , vol. 536, p. 128,131

108372-51-6 ~% 26421-32-9

文献：Sprio; Madonia Gazzetta Chimica Italiana, 1957 , vol. 87, p. 454,465

98554-68-8 ~% 26421-32-9

文献：Sprio; Madonia Gazzetta Chimica Italiana, 1957 , vol. 87, p. 454,465

120265-67-0 ~% 26421-32-9

文献：Sprio; Madonia Gazzetta Chimica Italiana, 1957 , vol. 87, p. 454,465

59311-24-9 15719-64-9 ~% 26421-32-9

文献：Lecocq; Buu-Hoi Comptes Rendus Hebdomadaires des Seances de l'Academie des Sciences, 1947 , vol. 224, p. 658

上下游产品

上游产品  8
26421-44-3 638-02-8 2530-10-1 13679-70-4
40197-02-2 108372-51-6 120265-67-0 59311-24-9
下游产品  3
20225-24-5 57248-13-2 57248-16-5

海关

海关编码	2934999090
中文概述	2934999090. 其他杂环化合物. 增值税率:17.0%. 退税率:13.0%. 监管条件:无. 最惠国关税:6.5%. 普通关税:20.0%
申报要素	品名, 成分含量, 用途
Summary	2934999090. other heterocyclic compounds. VAT:17.0%. Tax rebate rate:13.0%. . MFN tariff:6.5%. General tariff:20.0%