Sr. No.

Characteristics 

Requirements

1.

Description

Finely ground dark pink 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 0.4% if the dye content

8.

Dye Content

NLT14% on dried basis.

9.

Arsenic 

NMT 2ppm.

10.

Heay metals 

NMT 20 ppm

11.

Lead 

NMT 20 ppm