| Property | Specification | Test Method |
|---|---|---|
| Assay (NaNO₃) | ≥ 99.0% | Titration with potassium permanganate or Ion Chromatography (IC) |
| Appearance | Clear, colorless, odorless crystals, or white granules or powder | Visual |
| Loss on Drying | ≤ 2.0% | Drying at 105°C for 4 hours |
| Solubility in Water | Freely soluble | Visual |
| pH (5% solution) | 5.5 – 8.3 | Potentiometry |
| Solubility in Water | 1 g in 1.1 ml | Gravimetric analysis |
| Arsenic (As) | ≤ 3 mg/kg | Inductively Coupled Plasma Emission Spectroscopy (ICP-OES) or Atomic Absorption Spectroscopy (AAS) |
| Lead (Pb) | ≤ 10 mg/kg | ICP-OES or AAS |
| Nitrite (NO₂) | ≤ 1000 mg/kg | Colorimetric analysis |
