Standard Charactristic National Standard Content% 98.5 Moisture% 0.20 Acid Mol/L % 0.016 Refractive Index 20 DEG.C 1.524-1.527 Specific Gravity 20 DEG.C/20DEG.C 1.158-1.161 Auto-Ignition Temperature 315.5 Boiling Point 161.8C (323.2F) Melting Point -38.C (-37.7F)