在线观看视频免费完整版,人人超人人超碰超国产香蕉,国产色综合色产在线视频,欧洲亚洲色视频综合在线,欧洲亚洲色视频综合在线

№A510
CAS Rn:【5192-03-0】
Molecular weight: 132.1
Simple formula: C₈H₆N₂
Chemical structure formula:
SPECIFICATIONS:
Appearance : crystal
Colour : brown
Purity : 98.0% min (HPLC)
Melting point : 134~136℃
Loss on drying : 0.5% max
Packing : In 25kg net drum with PE liners