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): | NMT 1ppm |
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): | NMT 200ppm |
Heavy metals: | NMT 10ppm |
Iron (Fe): | NMT 50ppm |
Chlorides: | NMT 50ppm |
Sulphate (SO4): | NMT 150ppm |
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: | NMT 0.1%. |
Water: | NMT 1.0%. |
Assay (Anhydrous basis): | Not less than 99.0% and Not more than 101.0%. |