1 | Description | Yellow powder. | Yellow to orange powder. |
2 | Solubility | Complies | Soluble in water and alcohol. |
3 | Dye content (Spectrophotometry, on dry basis) | 71.00% | min. 70.00% |
4 | pH transition range (pH 4.3 - 6.3) | Complies | Brilliant yellow to pink |
5 | pH transition range (pH 9.4 - 12.0) | Complies | Brown orange to violet |
6 | Absorption, L max (pH 4.3) | 420nm | 418 - 424nm |
7 | Absorption, L max (pH 6.3) | 515nm | 514 - 520nm |
8 | Absorption, L max (pH 9.4) | 446nm | 445 - 451nm |
9 | Absorption, L max (pH 12.0) | 555nm | 554 - 558nm |
10 | Loss on drying,110°C | 5.43% | 8.00% max. |