| Description | Light Green, Crystaler or bluish green crystal |
| Solubility | Freely Soluble in water, very soluble in boiling water, practically insoluble in alcohol |
| Identification A | It gives the reaction of Sultes |
| Identification B | It gives the reaction (a) of Iron |
| Identification C | It complies the limits of the assay. |
| o:p> | 3.0 to 4.0 |
| Arsenic | Max 2 PPM |
| Lead | Max 3 PPM |
| Mercury | Max 1 PPM |
| Ferric Ions | Max 0.2 % |
| Organic Volatile Impurities | As per USP Spec |
| Assay | Min. 99.0% to 104.5 % Max. |
