... -2001 kno3 potassium nitrate SpecificationFine GradeFirst GradeQualified GradeAgricultural grade(avoid caking)Purity99.7pct.min.99.4pct.min.99.0pct.min98 ... glass refining agent and motor light glass, fireworks and black powder, salt bath of heat treatment, concentrating agent; In ... gloves, Be careful not to inhale the powder of potassium nitrate to protect respiration apparatus.3.Handing and Storage ...