Drywall Reference Libraries
Gypsum is a very soft mineral composed of calcium sulfate dihydrate, with the chemical formula CaSO4Â·2H2O. Chemical structure Heating gypsum above approximately 150Â°C (302Â°F) partially dehydrates the mineral by driving off exactly 75% of the water contained in its chemical structure. CaSO4Â·2H2O + heat â†’ CaSO4Â·Â½H2O + 1Â½H2O (steam) The partially dehydrated...
- A stinking tobacco.
- Offal; waste animal product; organic matter unfit for consumption.