Fast-soluble Caustic Soda Powder Must Be Stored in Steel Drum or other Well-sealed Packages, Thickness of Packaging Must Be More Than 0.5 Mm, Compression Resistance of Packaging Must More Than 0.5pa. all Packaging Must Be Printed Â��corrosiveâ�� Symbol. Keep Container Tightly Closed and in a Cool, Well-ventilated Area. Never Add Water to this Product. in Case of Insufficient Ventilation, Wear Suitable Respiratory Equipment. Keep Away from Incompatibles such as Oxidizers, Reducing Agents, Metals, Acids, Alkalis, Moisture. in Case of Burning, Use Water, Sand or Fire Extinguisher to Put Out Fire, However, Please Pay Attention to the Corrosive Liquid When Caustic Soda Beads are Solved in Water items specifications checking Result Standard naoh % 99.4 ≥99.0 na2co3 % 0.45 ≤0.8 nacl % 0.03 ≤0.08 fe2o3 % 0.002 ≤0.004.