... as disinfectant, preservativeQuality Index: ItemQuality IndexBest QualityFirst QualityQualifierSodium Nitrate content(dry basis),%,≥99.599.398.5Moisture,%,≤1.51. ... (dry basis),%,≤0.150.24--Sodium Nitrite content(dry basis),%,≤0.010.020.15Sodium Nitrate content(dry basis),%,≤0.050. ... 10--Fe content,%,≤--0.0050.005 Sodium Nitrite (FOOD GRAED best ...