Name:Sodium hydroxide /Causic Soda CAS No.: 1310-73-2/8012-01-9 Molecular Form:NaOH Molecular Weight:41.0045 EINECS:215-185-5 Appearance:White opaque crystals Purity:99.99% Density:2.13 g/cm3 Melting Point:318℃ Flash Point:176-178 °C Boiling Point:100°C at 760 mmHg Relax index:1,473-1,475 Vapour Pressure:24.5mmHg at 25°C Solubility:H2O: 1 M at 20 °C, clear, colorless Sensitive：Air Sensitive & Hygroscopic Package:bottle/bag Usage:desiccant Storage:2-8°C