PRODUCT SPECIFICATION
| TEST | SPECIFICATION |
| Appearance | Powder |
| Color | Blue to Black color |
| Solubility in water | Soluble |
| Dye Content | >63% |
| Maximum Absorption at γ max (nm) | 610(±5) nm |
| Volatile Matter at 105°C | 7% Max |
| Absorbance (%) | Min. 450 % |
| Iron | <250ppm |
| Heavy Metal | Passes Test |




