3,5-Pyrocatecholdisulfonic Acid -100Grm
(Tiron) metal indicator
Manufacturer: Merck
Catalog ID: 101922.0100
Stock: In Stock
Description
| Catalogue Number | 101922 |
| Synonyms | 1,2-Dihydroxy-3,5-benzenedisulfonic acid disodium salt, di-Sodium 4,5-dihydroxy-1,3-benzenedisulfonate, Sodium pyrocatechol-3,5-disulfonate, Tiron |
Product Information
| CAS number | 149-45-1 |
| EC number | 205-741-5 |
| Hill Formula | C₆H₄Na₂O₈S₂ * H₂O |
| Molar Mass | 332.22 g/mol |
| HS Code | 2908 99 00 |
Physicochemical Information
| Melting Point | 300 °C |
| pH value | 5.0 (10 g/l, H₂O, 20 °C) |
| Bulk density | 465 kg/m3 |
| Solubility | 1350 g/l |
Storage and Shipping Information
| Storage | Store at +15°C to +25°C. |
Specifications
| Identity (UV/VIS-Spectrum) | passes test |
| Absorption maximum λmax. (buffer pH 2.5) | 290 - 291 nm |
| Spec. Absorptivity A 1%/1cm (λmax; 0.05 g/l; buffer pH 2.5; calculated on anhydrous substance) | 100 - 125 |
| Water (according to Karl Fischer) | 4.5 - 6.5 % |
| Suitability as indicator (for metal titration) | passes test |
