Eriochrome Black T AR
C.I.No.14645 Indicator for the determination of calcium plus magnesium by titration with EDTA
Solochrome Black T, Sodium 4-[(1-hydroxynaphthalen-2-yl-hydrazinylidene]-7-nitro-3-oxo-Y-naphthalene-1-sulphonate
Product Code. |
01122 |
Grade |
AR |
Purity |
CAS No. |
1787-61-7 | |
Molecular Formula |
C20H12N3NaO7S |
Molecular Weight |
461.38 |
H.S.Code |
3204.90000 |
Shelf Life |
60 Months |
Physical Properties
| Physical state at 20 °C |
Solid |
Colour |
Brownish black powder |
Odour |
Odorless |
Packaging
Specification
| Appearance | Brownish black powder |
| Suitability (as metal indicator) | Passes test |
| Absorption maxima at pH 10 | 612 - 616 nm |
| Clarity of solution | Passes test |
| Specific absorptivity A1%/1cm (lmax; 0.02 g/L; buffer pH 10.0; calculated on dried substance) | Min 300.0 |
| Loss on dryig (at 110°C) | Max 7.0% |
Safety Information and Hazard Symbols