poronovideos人初重口_黑人粗大a片在线观看_美女末成年视频黄是免费网址_另类maturetube富婆

市場(chǎng)價(jià):元價(jià)格:元

  • 中文名稱:八苯基環(huán)四硅氧烷
  • CAS RN:546-56-5
  • EINECS號(hào):208-904-9
  • 分 子 式:C48H40O4Si4
  • 分 子 量:795.19
  • 分子式:
外觀與性狀:白色粉末
密度:1.185g/mL
熔點(diǎn):196-198 °C(lit.)
沸點(diǎn):334 °C
閃點(diǎn):200 °C

折射率:1.66


海關(guān)編碼:2916399090
WGK Germany:1
安全說(shuō)明:S22-S24/25
RTECS號(hào):GZ4398500
? ? ? 用于醫(yī)藥中間體或其它高分子的合成等


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