glass industry use grade potassium nitrate

Production Description: Potassium nitrate is fully water soluble powder or granule product, hygroscopic, flammable, and explosive. When storing, you need to prevent high temperature and avoid contact with flammable materials. Specification: Technical Specification Standard Assay 99.4%min Moisture 0.10%max Iron 0.003%max Chloride 0.03%max Sulphates 0.01%max Insolubles Water 0.01%max Application: It could used in production of glassware, plays the role of temperature-resistant hardening glass, and makes glass clarification.