Versatile analytical reagent for the TLC determination of the methylenedioxy group for the estimation of ethylene glycol in biological materials reagent for chromium, nitrate and titanium. Suitable for formaldehyde determination. 1,8-Dihydroxynaphthalene-3,6-disulfonic acid disodium salt; 4,5-Dihydroxynaphthalene-2,7-disulfonic acid disodium salt.
| Chromotropic Acid DiSodium Salt, Extrapure - Specification | |
| Synonyms | 1,8-Dihydroxynaphthalene-3,6-disulfonic acid disodium salt; 4,5-Dihydroxynaphthalene-2,7-disulfonic acid disodium salt |
| Assay (acidimetric) | Min 98% |
| Appearance | Brown colored powder |
| Water (H2O) | 8.5 - 9.5% |
| Colour | Brown powder |
| Melting point/ Freezing point [°C] | >300°C |
| Solubility in water [% weight] | Soluble in water |
| Odour | Odorless |
| Physical state at 20 °C | Solid |
| Chromotropic Acid DiSodium Salt, AR - Specification | |
| Synonyms | 1,8-Dihydroxynaphthalene-3,6-disulfonic acid disodium salt; 4,5-Dihydroxynaphthalene-2,7-disulfonic acid disodium salt |
| Appearance | Grayish white to grayish brown powder |
| Assay (acidimetric) | Min 98.5% |
| Appearance of solution | Passes test |
| Water (by KF) | 8.5 - 9.5% |
| Suitability (for determination of formaldehyde) | Passes test |
| Suitability (for determination of nitrate) | Passes test |
| Colour | Brown powder |
| Melting point/ Freezing point [°C] | >300°C |
| Physical state at 20 °C | Solid |
| Odour | Odorless |
| Solubility in water [% weight] | Soluble in water |