久久综合九色综合欧美狠狠,欧美日本免费一区二区三区,强奷漂亮少妇高潮A片久久,免费a级毛片无码

Appearance:Light yellow crystalline

Purity:99%min.

Melting point:232.0-234.0

3-Nitrosalicylic acid :0.5% max.

Single impurity  :  0.5% max.

Residue on ignition :0.5% max.

Packing: 25kgs cardboard drum