Item Quality index |
130 |
Moisture |
≤0.8% |
Residue after sifting (45um meshes) |
≤0.5% |
PH in extract water |
5-7 |
Soluble matter in water |
≤0.3% |
Fe2O3 Content |
≥95% |
Colour(compared with standard) |
Approximate |
Properties and appearance:Deep red powder,sistance to acids and alkais,fastness to light,heat;having the good chemical stability,excellent in tinting strenghth and hiding power.