Sodium Hydroxide Powder CAS NO: 1310-73-2 NaOH Specification Sr. No. Tests Specification 1. Descriptions White Deliquescent powder 2. Assay (min) 98.5% 3. Carbonate (as Na2CO3) <1% 4. Chloride <0.005% 5. Sulphate(SO4) <0.003% 6. Phosphate(PO4) <0.002% 7. Silica(SiO2) <0.01% 8. Particle Size Not less than 80% pass thro’ 1000 micron (ASTM No.18) Properties Chemical formula NaOH Molecular weight 40 Absolute density, g/cm3 2.13 Melting point, °C 318.4 Boiling point, °C 1390 Solubility in water*, g/100g H2O 42@ 0°C 114 @ 25°C 347 @ 100°C Previous