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Specifications :
| No. | Tests | Limits | Method Ref. |
| 1 | Appearance | White or slightly off white to light cream colour powder | Visual |
| 2 | Purity (On drying basis) by UV Spectrophotometer | 99.00 % w/w Min. | NQA 902 |
| 3 | Loss on drying by moisture analyzer at 110oC for 10 min | 0.50 % w/w Max. | NQA 513 |
| 4 | Alkalinity as Na2CO3 by H2SO4 titration | 0.15 % w/w Max. | NQA 915 |
| 5 | Chloride as Cl by Potassium Chromate | 0.24 % w/w Max. | NQA 507 |
| 6 | Sodium Nitrite by KMnO4 titration | 0.03 % w/w Max. | NQA 914 |
| 7 | Iron as Fe by Potassium thiocyanate | 0.005 % w/w Max. | NQA 502 |