Physical Properties Metric English Comments Density 1.03 g/cc 0.0372 lb/in3 ISO 1183 Apparent Bulk Density 0.425 g/cc 0.0154 lb/in3 ISO 1068 Particle Size 48 - 52 μm 48 - 52 μm Average; ATO 40-41-0 (Coulter Counter) pH >= 4.0 >= 4.0 ATO 40-40-0 (pH meter) Specific Surface Area 1.0 m2/g 1.0 m2/g ATO 40-45-0 (BET) Thermal Properties Metric English Comments Melting Point 177 °C 351 °F ISO 3146 Processing Properties Metric English Comments Moisture Content 1.0 % 1.0 % ISO 1625