亚洲毛片免费在线观看|一级做a爱片久久蜜桃|欧美日韩加勒比精品一区|欧美乱偷一区二区三区在线|国产午夜无码片在线观看影|久久久久国色av∨免费看|久久精品国产亚洲av高清热|国产成人亚洲精品无码综合原创


官方移動(dòng)平臺(tái)
P-Phenylenediamine
    Spec
    ≥99.5%
    Packing Details
   25kg/pp bag; 25kg/drum
    Use
    Intermediates, the preparation of dyes, fur dyes, rubber antioxidant, photos reagent
    CAS NO.
    106-50-3
    Molecular Structure
     C6H8N2
    Molecular Weight
     108.1411
    Molecular Formula