硫酸镁七水合物，Magnesium sulfate heptahydrate；99.5-100.5% (calc. to the dried substance), meets analytical specification of Ph. Eur., BP,USP, FCC

蒸汽密度

<0.01 (vs air)

质量水平

200

蒸汽压

<0.1 mmHg ( 20 °C)

测定

99.5-100.5% (calc. to the dried substance)

形式

powder or crystals

质量

meets analytical specification of Ph. Eur., BP,USP, FCC

杂质

acidity or alkalinity, in accordance
organic volatile impurities, complies (GC)
residual solvents, complies
≤0.001 ppm heavy metals (as Pb)
≤0.004% free alkali (as MgO)
≤0.01% free acid (as H₂SO₄)

缺失

48.0-52.0% loss on drying, 450 °C

pH值（酸碱度）

5.0-9.2 (25 °C, 5%)

痕量阴离子

chloride (Cl^-): ≤150 mg/kg

痕量阳离子

As: ≤2 ppm
Fe: ≤20 ppm
Pb: ≤4 ppm
Se: ≤30 ppm

适用性

complies for appearance of solution

SMILES string

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

InChI

1S/Mg.H2O4S.7H2O/c;1-5(2,3)4;;;;;;;/h;(H2,1,2,3,4);7*1H2/q+2;;;;;;;;/p-2

InChI key

WRUGWIBCXHJTDG-UHFFFAOYSA-L