colorless hexagram crystal, grey or light yellow is allowable Medical devices used as disinfectant, preservativeQuality Index: ItemQuality IndexBest QualityFirst QualityQualifierSodium ... 030.06--Chloride(Cl)content(dry basis),%,≤0.150.24--Sodium Nitrite content(dry basis),%,≤0.010.020.15Sodium Nitrate ... basis),%,≤0.050.10--Fe content,%,≤--0.0050.005 Sodium Nitrite (FOOD GRAED best quality-99.5%)