Chemical Composition 
CaSO4 2H2O91 - 92
MgCO31 - 2%
CaCO3Less than 1%
Fe2O3Less than .05%
Al2O3Less than 0.2%
Physical Properties 
Bound Water19.12%
Hardness (Mohs)2
Specific Gravity2.32
pH7.8
MoistureLess than .1%
Average Bulk Density lb/ft350 - 55
Average Particle Size, Microns Proprietary 
% Retained - 100 meshTrace
% Retained - 200 mesh5 - 8
% Retained - 325 mesh32 - 35
Packing: 50 lbs paper bag on pallets
Origin: USA