description： 2-Acetyl-5-methylthiophene is a volatile organic compound formed during the reaction between L-cysteine and dihydroxyacetone in glycerine or triglyceride solvent system. It can be prepared by reacting 2-methylthiophene with acetic anhydride. 2-Acetyl-5-methylthiophene undergoes palladium-catalyzed cross-coupling reaction with aryl bromides to form C-4 arylated product. It reacts with 1,2-bis(5-formyl-2-methylthiophen-3-yl)cyclopentene via Aldol condensation to form a chalcone with photochromic property. The standard molar enthalpies of combustion, formation and vaporization of 2-acetyl-5-methylthiophene are 4341.9 ± 1.8kJ/mol, 158.0 ± 2.1kJ/mol and 62.0 ± 2.6kJ/mol, respectively. application： 2-Acetyl-5-methylthiophene may be used in the preparation of: • 2-ethyl-5-methylthiophene • (5-methylthiophen-2-yl)glyoxal • (2E)-1-(5-methylthiophen-2-yl)-3-(pyridin-3-yl)prop-2-en-1-one • ethyl 3-(5-methylthiophen-2-yl)-3-oxopropanoate
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2-Acetyl-5-methylthiophene
Dangerous GoodsCAS number：13679-74-8 molecular formula：C7H8OS
overview
compound introduction
Specs
| Chinese alias | 2-乙酰基-5-甲基硫代苯 | ||
| English alias | DTXSID10159932 | MFCD00014529 | AKOS000200731 | 97YBD5W80B | 2HS3I278W9 | InChI=1/C7H8OS/c1-5-3-4-7(9-5)6(2)8/h3-4H,1-2H3 | PS-6271 | AB01148 | EINECS 237-181-2 | 4'-(Benzyloxy) acetophenone | FT-0610963 | Methylthienylcetone | 5-methyl-2-acetylthiophene | ||
| CAS number | 13679-74-8 | molecular formula | C7H8OS |
| molecular weight | 140.2 g/mol | Exact mass | ≥96%(GC) |
| PSA | 45.300 Ų | logp | 2.000 |
numbering system
No numbering system information yet
physicochemical properties
No physical and chemical property information yet
Safety information
pictogram：
GHS07
Signal word：
Warning
Hazard Statement：
H315: 引起皮肤刺激 H319: 引起严重眼睛刺激 H335: 可能引起呼吸道刺激 H302: 吞食有害 H312: 皮肤接触有害 H332: 吸入有害
Statement of Preventive Measures：
P261: 避免吸入灰尘/烟雾/气体/雾/蒸汽/喷雾 P305+P351+P338: 如进入眼睛：用水小心冲洗几分钟。如戴隐形眼镜并可方便地取出，取出隐形眼镜。继续冲洗。 P280: 戴防护手套/穿防护服/戴防护眼罩/戴防护面具。 P302+P352: 如皮肤沾染：用水充分清洗。 P321: 特殊处理（请参阅此标签上的...）。 P405: 密闭存放 P501: 将内容物/容器处理到。。。 P264: 处理后要彻底洗手。 P271: 仅在室外或通风良好的地方使用。 P270: 使用本产品时，请勿进食、饮水
WGK Germany：
3
Personal protective equipment：
Eyeshields,Gloves,type N95 (US),type P1 (EN143) respirator filter
RTECS：
OB4972000
UN Number：
3335
Production methods and uses
No production method and use information yet
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upstream information
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downstream information
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MSDS
Found 1 shareMSDS
13679-74-8 | 2-Acetyl-5-methylthiophene.pdf
