Chromotropic Acid Disodium Salt Dihydratr 25Grm
for analysis ACS,Reag. Ph Eur
Manufacturer: Merck
Catalog ID: 102498.0025
Stock: In Stock
Description
| Catalogue Number | 102498 |
| Replaces | DX1460-1 |
| Synonyms | 4,5-Dihydroxy-2,7-naphthalene disulfonic acid sodium salt |
Product Information
| CAS number | 5808-22-0 |
| EC number | 204-972-9 |
| Grade | ACS,Reag. Ph Eur |
| Hill Formula | C₁₀H₆Na₂O₈S₂ * 2 H₂O |
| Molar Mass | 400.30 g/mol |
| HS Code | 2908 99 00 |
Physicochemical Information
| Melting Point | >300 °C |
| pH value | 3.6 (10 g/l, H₂O, 20 °C) |
| Bulk density | 780 kg/m3 |
| Solubility | 170 g/l |
Storage and Shipping Information
| Storage | Store below +30°C. |
Specifications
| Appearance | greyish white to brownish white powder |
| Assay (acidimetric, calc. on anhydrous substance) | ≥ 98.5 % |
| Identity (IR-spectrum) | passes test |
| Appearance of solution (5 %; water) | passes test |
| Water (according to Karl Fischer) | 8.5 - 9.5 % |
| Sensitivity (of formaldehyde) | passes test |
| Sensitivity (of nitrate) | passes test |
