It is mainly used as dyeing aid for wool and nylon, as well as electroplating, adhesive and metal washing.
Indication  | Index  | |||||
Liquid  | Solid  | |||||
Qualified  | Superior  | Qualified  | Superior  | |||
Content% ≥  | 70.0  | 70.0  | 99.0  | 99.5  | ||
Free acid% ≥  | 62.0  | 62.0  | ----  | ----  | ||
Water insoluble matter% ≤  | 0.01  | 0.01  | 0.01  | 0.01  | ||
Cl% ≤  | 1.0  | 0.001  | 0.001  | 0.0005  | ||
SO4% ≤  | 0.08  | 0.01  | 0.01  | 0.005  | ||
Burning residue% ≤  | ----  | 0.1  | 0.1  | 0.1  | ||
Fe% ≤  | 0.001  | 0.001  | 0.001  | 0.001  | ||
Pt% ≤  | 0.001  | 0.001  | 0.001  | 0.001  | ||
Chroma (platinum cobalt) black ≤  | 20  | 20  | ----  | ----  | ||