SODIUM NITRITE   Molecular formula NaNO2 Molecular weight 69.00 Specific gravity 2.168 Melting point 271℃ Appearance White or light yellow crystal Packaging Woven bags with vinyon outside,vinyon film moistureproof bags inside. NW:50kg or 25kg /bag. Specification INDEX  ITEM INDEX 1ST GRADE 2ND GRADE 3RD GRADE NaNO2 content % (dry basis) ≥ 99.0 98.5 98.0 NaNO3 content % (dry basis) ≤ 0.80 1.00 1.90 Moisture content % ≤ 2.0 2.0 2.50 Water insoluble substance % ≤ 0.05 0.06 0.10