molecular formula: CaSO4·2H2O
CAS: 10101-41-4
Appearance:
White crystal powder
Properties:
Colorless columnar crystal or white crystalloid powder. 128 ℃ lose 1.5 gesso to half hydrate and 163 ℃ above be without water content. The relative density 2.32, melting point ℃ (1450 without water content). Slightly soluble in hot water soluble in alcohols and most organic solvents.
Use:
Analytics reagents, also used in water treatment, papermaking, printing, dyeing, metallurgy and coating, adhesive production
Details:
|
Test item |
Specification |
|
Reagent grade |
Pharmaceutical grade |
|
Appearance |
Conform |
Conform |
|
Assay /% |
≥99.0 |
≥97.0 |
|
Clarify degrees test |
Conform |
Conform |
|
Hydrochloric acid insoluble, /% |
≤0.025 |
≤0.05 |
|
Chloride (Cl)/% |
≤0.002 |
≤0.005 |
|
Nitrate (NO3)/% |
≤0.002 |
≤0.005 |
|
Ammonium salt (NH4)/% |
≤0.005 |
≤0.015 |
|
Carbonate (CO3)/% |
≤0.05 |
≤0.1 |
|
Ferric (Fe)/% |
≤0.0005 |
≤0.001 |
|
Heavy metal (Pb)/% |
≤0.001 |
≤0.002 |
|
Alkali metal magnesium and (MgO)/% |
≤0.2 |
≤0.5 |
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