1 | Description | White, crystalline powder. It is odorless and has a characteristic, acid taste. Melting point is 290°C | White, granules , white crystals or crystalline powder. it is odorless and has a characteristic, acid taste. Metling point about 290°C. |
2 | Solubility | Complies | Freely soluble in n.n-dimethylformamide, Soluble in methanol and .in ethanol (95%); slightly soluble in water and in ether; very slightly soluble in chloroform. dissolve in ammonia TS and in sodium hydroxide TS |
3 | Identification by IR | Complies | IR spectra of the sample should be concomitant with IR spectra of the corresponding standard. |
4 | Identification (Chemical test 1) | Complies | The solution should show green-blue fluorescence |
5 | Identification (Chemical test 2) | Complies | The color of the test solution should disappears |
6 | Clarity and colour of solution | Complies | The solution shoud clear and colorless |
7 | Sulfate | Less than 0.010% | NMT 0.010% |
8 | Heavy metals | Less than 10 ppm | NMT 10 ppm |
9 | Arsenic | Less than 2 ppm | NMT 2 ppm |
10 | Limit of Maleic acid | 0.004% | NMT 0.1% |
11 | Water | 0.4% | NMT 0.5% |
12 | Residue on ignition | 0.02% | NMT 0.05% |
13 | Assay (Anhydrous basis) | 99.8% | 99.5% - 100.5% |