| Description | : | Colourless crystalline powder. |
| Odour | : | Almost Odourless. |
| Melting Range | : | 158.5 0 C to 161.0 0 C. |
| Appearance of Solution/Clarity & Colour of Solution | : | Passes test as per B.P./I.P |
| Heavy Metals | : | 20 ppm (max.) |
| Sulphated Ash/Residue on Ignition | : | 0.1% w/w (I.P./B.P.Limit) / 0.05%w/w (U.S.P. Limit) |
| Chloride | : | 125 ppm (max.) I.P./100 ppm (max.) B.P. |
| Sulphate | : | 0.02% (max.) I.P./140 ppm U.S.P. |
| Related Substance | : | Complies with U.S.P. test. |
| Loss of Drying | : | 0.5% (max.) B.P. |
| Iron | : | 2 ppm (max.) I.P. |
| Readily Carbonisable Substance | : | Passes test |
| Assay | : | 99.0% to 100.5% I.P./B.P., 99.5% to 101% U.S.P. of C7H6O3 with reference to substance dried over Silica Gel for three hours. |