| CAS No. | : | 1787-61-7 |
| Synonym | : | Mordant Black 11 |
| Appearance | : | Black to dark brown – black fine powder |
| Suitability (as metal indicator) | : | Passes test |
| Clarity of solution | : | Passes test |
| Absorption maximum at pH 10 | : | 612 – 616 nm |
| Specific absorptivity A 1%/1cm (λmax;0.02 g/L; buffer pH 10.0; calc. on dried substance) | : | Min 300.0 |
| Loss on drying (at 110oC) | : | Max 7.0% |