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| USG Terra Alba No. 1 |
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| Gypsum |
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| Gypsum (Calcium Sulfate Dihydrate, CaSO4 · 2H2O) |
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| 13397-24-5 |
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Dihydrate form of calcium sulfate
Neutral pH
Made from high purity white gypsum containing about 20% water of crystallization
Water of crystallization (combined water) starts being released as it is heated above ~50'C.
75% of water is released as Terra Alba reaches 180'C
Water not totally removed until temperatures exceed 400'C |
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Appearance and Odor: Off white to white powder: low odor
Melting Point: 1450'C - decomposes
Specific Gravity: 2.32 - 2.96
Solubility in Water: 0.26% |
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