CASR |
: | 77-92-9 |
Molecular Formula |
: | C6H8O7 |
Molecular Weight |
: | 192.13 |
| Specifications | |
|---|---|
| Description: | Colourless crystals or a white powder; slightly hygroscopic in moist air.(Note: The product may cause lumps or hardening over the storage). |
| Solubility: | Very soluble in water, freely soluble in ethanol (95%), sparingly soluble in ether.. |
| Identification A (By IR): | IR spectra of the sample should be concomittant with IR spectra of the satandard. |
| Identification B (By Chemical test): | A white precipitate soluble in 6M acetic acid should produce. |
| Identification C (By Chemical test): | A 10.0% w/v solution should be strongly acidic. |
| Appearance of Solution: | The solution should be clear and not more intensely coloured than reference solution YS7, BYS7 or GY7. |
| Arsenic (As): | 1ppm max. |
| Barium(Ba): | Any opalescence produced shall not more intense than that of mixture of 5ml of solution A and 5ml of distilled water. |
| Calcium (Ca): | 200ppm max. |
| Heavy metals: | 10ppm max. |
| Iron (Fe): | 50ppm max. |
| Chlorides: | 50ppm max. |
| Sulphate (SO4): | 150ppm max. |
| Oxalic acid: | Any pink colour produced should not be more intense than that produced by carrying out the test using 0.2mg of oxalic acid dissolved in 4ml of water. |
| Readily carbonizable substances: | Any colour produced shall not be more intense than that of a mixture of 1.0 ml of CCS and 9.0 ml of FCS. |
| Sulphated ash: | Not more than 0.1%. |
| Water: | Not more than 1.0%. |
| Assay (Anhydrous basis): | Not less than 99.0% and Not more than 101.0%. |
| Particle size: | NLT 50% material should pass through #40 mesh. |
