CAS Number
1787-61-7
Formula
C20H12N3NaO7S
Weight
461,38
3-Hydroxy-4-[(1-hydroxy-2-naphthalenyl) azo]-7-nitro-1-naphthalenesulfonic Acid, Monosodium Salt; Mordant Black 11
EC: 217-250-3 NC: 3204 16 00
| Appearance | Brownish black powder |
| Suitability (as metal indicator) | p/t. |
| Absorption maxima at pH 10 | 612 - 616 nm |
| Clarity of solution | p/t. |
| Specific absorptivity A1%/1cm (lmax; 0,02 g/L; buffer pH 10,0; calculated on dried substance) | Min 300,0 |
| Loss on drying (at 110°C) | Max 7,0% |
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