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USG Terra Alba No. 1 |
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Gypsum |
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Gypsum (Calcium Sulfate Dihydrate, CaSO4 Ў¤ 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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