colorless hexagram crystal, grey or light yellow is allowable Medical devices used as ... , preservativeQuality Index: ItemQuality IndexBest QualityFirst QualityQualifierSodium Nitrate content(dry basis),%,≥99.599.398.5Moisture,%,≤1.51.82.0Water insolubles,%,≤0.030 ... content,%,≤--0.0050.005 Sodium Nitrite (FOOD GRAED best quality-99.5%)