Testing the Free Moisture Content of Gypsum
Calcium Sulphate Dihydrate (CaSO4·2H2O), otherwise known as gypsum, is an inert compound containing ~20% by weight chemically combined water. When analysing gypsum for its moisture content, we are measuring the free moisture content not the combined water (2H20) content. For reference generally in our gypsum products we see the free moisture content fluctuate between 3-6%.
			
					
			
			
			
			
			
			
			
			
			