强 暴 疼 哭 处 女 身子视频,国产av无码专区亚洲av手机麻豆,被窝电影,metart极品人体

<noframes id="jvbjl">
<address id="jvbjl"></address>
<noframes id="jvbjl"><address id="jvbjl"></address>

    Ethylbenzene for industrial

    Ethylbenzene, an aromatic hydrocarbons,chemical formula C6H5C2H5, is flammable, its steam can form explosive mixtures with air. In open flame, high fever, or contact with antioxidant, is in danger of cause burning explosion.

    Ethylbenzene is an aromatic organic compounds, is primarily used in the petrochemical industry as intermediates of styrene production, which is generally used for the preparation of commonly used plastic products-polystyrene. Although there is a small amount of ethylbenzene in crude oil, but mass production is still rely on the acid catalytic reaction of benzene with ethylene. Ethylbenzene by catalytic dehydrogenation, generates hydrogen and styrene.

    NumberItemIndexTest Method
    Premium GradesFirst Grades
    1AppearanceColorless, transparent, even liquid, no mechanical impurities and free waterVisual
    2Density(20℃),kg/m3866-870GB/T 4472
    3PH value of water extract6.0-8.0SH/T 1146
    4Fineness,%(m/m) ≥99.7099.50SH/T 1148
    5Dimethylbenzene,%(m/m) ≤0.100.15SH/T 1148
    6Cumin,%(m/m) ≤0.030.05SH/T 1148
    7Diethylenzene,%(m/m) ≤0.0010.001SH/T 1148
    8Sulphur,%(m/m) ≤0.0003Not MeasureSH/T 1147

    Buy immediately

    <noframes id="jvbjl">
    <address id="jvbjl"></address>
    <noframes id="jvbjl"><address id="jvbjl"></address>

      强 暴 疼 哭 处 女 身子视频,国产av无码专区亚洲av手机麻豆,被窝电影,metart极品人体