|
Sr.
No. |
Characteristics |
Requirements |
|
1. |
Description |
Finely ground bright blue colored powder |
|
2. |
Solubility |
Insoluble in water and inorganic solvents. |
|
3. |
pH |
3.0-5.0 (2 % slurry in D.M. water) |
|
4. |
Loss on drying |
Not more than 20% |
|
5. |
Bulk Density |
Between 0.25-0.40 g/cc. |
|
6. |
Particle size |
Average particle size less than 10 micron |
|
7. |
Bleeding |
NMT 1.0 % if the dye content |
|
8. |
Dye Content |
NLT 7 % on dried basis. |
|
9. |
Arsenic |
NMT 2ppm. |
|
10. |
Heay metals |
NMT 20 ppm |
|
11. |
Lead |
NMT 20 ppm |
