grade

ACS reagent

Quality Level

200

Assay

98%
98.0-102.0% (ACS specification)

form

powder

impurities

≤0.02% insol. dil. HCl

anion traces

carbonate (CO₃^2-): passes test
chloride (Cl^-): ≤0.005%
nitrate (NO₃^-): ≤0.005%

cation traces

Fe: ≤0.001%
K: ≤0.005%
Mg: ≤0.02%
Na: ≤0.02%
Sr: ≤0.05%
heavy metals: ≤0.002% (by ICP-OES)

SMILES string

O.O.[Ca++].[O-]S([O-])(=O)=O

InChI

1S/Ca.H2O4S.2H2O/c;1-5(2,3)4;;/h;(H2,1,2,3,4);2*1H2/q+2;;;/p-2

InChI key

PASHVRUKOFIRIK-UHFFFAOYSA-L