1.  Name:  Sulphur Black

2.  Molecular formula:    C₆H₄N₂O₅

3.  Molecular weight:   184.10636

4.  Physical and Chemical property:  solubility(25℃): ≥160g/l    intensity:100% 　

5.  Specification:  200%501; 200%521; 200%522

6.  Appearance:  black powder and subtle grain