Sodium Fluoride Chemical Properties Melting point: 993 °C(lit.) Boiling point: 1700 °C Density: 1.02 g/mL at 20 °C Vapor pressure: 1.4 mm Hg ( 0 °C) Fp: 1704°C Storage temp.: 2-8°C Solubility H2O: 0.5 M at 20 °C, clear, colorless Form: powder Color: White to off-white Specific Gravity: 2.558 PH: 7.0-10.0 (25℃, 0.5M in H2O) Odor: Odorless Water Solubility: 4 g/100 mL (25 ºC) Sensitive: Hygroscopic