Pentamethylbenzene is an organic compound with the formula C6H(CH3)5. It is a colourless solid with a sweet odor. The compound is classified as an aromatic hydrocarbon. It is obtained by the methylation of xylene. Like durene (1,2,4,5-tetramethylbenzene), pentamethylbenzene is rather electron-rich and undergoes electrophilic substitution readily. The compound has little value outside of the research laboratory.

CAS：700-12-9
中文别名：戊甲基苯;五甲苯;
英文别名：Pentamethylbenzene;Benzene, pentamethyl-;
分子式：C11H16
分子量：148.245
精确质量：148.125
Psa：0.0
Logp：3.2286

EINECS号：211-837-8
MDL号：MFCD00008522

外观与性状：白色至淡黄色结晶粉末
密度：0.917g/mLat 25°C(lit.)
沸点：231°C(lit.)
熔点：49-51°C(lit.)
闪点：196°F
折射率：1.501

安全说明：S16-S26-S36
危险类别码：R11; R36/37/38
WGK Germany：3
危险品运输编码：UN 1325 4.1/PG 2
海关编码：2942000000
危险类别：4.1
包装等级：III
危险品标志：F; Xi

用途
主要用作杀菌剂。