| Specifications | |
|---|---|
| Identity (UV/VIS-Spectrum) | passes test |
| Absorption maximum λmax. (buffer pH 12.2) | 634 - 640 nm |
| Spec. Absorptivity A 1%/1cm (λmax; 0.015 g/l; buffer pH 12.2; calculated on dried substance) | 250 - 400 |
| Loss on drying (110 °C) | ≤ 10 % |
| Suitability as indicator (for metal titration) | passes test |
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Key Spec Table
| CAS # | EC Number | Hill Formula | Molar Mass |
|---|---|---|---|
| 2538-85-4 | 219-810-2 | C₂₀H₁₃N₂NaO₅S | 416.39 g/mol |
| Description | |
|---|---|
| Catalogue Number | 104594 |
| Synonyms | 2-Hydroxy-1-(2-hydroxy-1-naphthylazo)naphthalene-4-sulfonic acid sodium salt |
| Product Information | |
|---|---|
| CAS number | 2538-85-4 |
| EC number | 219-810-2 |
| Hill Formula | C₂₀H₁₃N₂NaO₅S |
| Molar Mass | 416.39 g/mol |
| HS Code | 2927 00 00 |
| Structure formula Image | |
| Applications | |
|---|---|
| Application | Calcon (C.I.15705) metal indicator. CAS 2538-85-4, pH 9.4 (10 g/l, H₂O, 25 °C). MSDS and product info below. |
| Physicochemical Information | |
|---|---|
| pH value | 9.4 (10 g/l, H₂O, 25 °C) |
| Bulk density | 530 kg/m3 |
| Solubility | 20 g/l |
| Safety Information according to GHS | |
|---|---|
| Storage class | 10 - 13 Other liquids and solids |
| WGK | WGK 2 water endangering |
| Disposal | 3 Relatively unreactive organic reagents should be collected in container A. If halogenated, they should be collected in container B. For solid residues use container C. |
| Storage and Shipping Information | |
|---|---|
| Storage | Store at +5°C to +30°C. |
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