... UN NO.1486,CLASS 5.1 Potassium nitrate colorless crystal powder, Relative density2.1109, Melting Point 333°C. Use: Mainly for CRT ... glass bulbs, auto lights bulbs, glass clarifying agent. Used for crops and flowers of compound fertilizers, foliar fertilization. Used ... hair color agent; preservatives, such as for bacon, luncheon meat played a preservative.. Potassium nitrate for sale CAS NO#7757-79-1