plaster of Paris

[1. exsiccated calcium sulfate from which the water of crystallization has been expelled by heat, but which, when mixed with water, will form a paste that subsequently sets.

Molecular Formula: Ca₂H₂O₉S₂

InChI: InChI=1/2Ca.2H2O4S.H2O/c;;2*1-5(2,3)4;/h;;2*(H2,1,2,3,4);1H2/q2*+2;;;/p-4/f2Ca.2O4S.H2O/q2m;2*-2;

InChIKey: InChIKey=ZOMBKNNSYQHRCA-OGDYXPHJCS
SMILES: [Ca++].[Ca++].[H]O[H].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O

Names:
    calcium sulfate hemihydrate
    calcium sulphate hemihydrate
    dicalcium disulfate hydrate
    Gipshalbhydrat
    gypsum hemihydrate
    plaster of Paris
    2CaSO4·H2O

Registries:
    PubChem CID 3033839
    ChEBI 32584
    PubChem ID 10047807