Merck 1051071000 二硫酸钾, Emsure 分析适用 (K₂O₇S₂, 塑料瓶 1 kg)

CAS number: 7790-62-7

EC number: 232-216-8

Hill Formula: K₂O₇S₂

Molar Mass: 254.33 g/mol

Assay (acidimetric, as K₂S₂O₇): 97.5 - 100.0 %

Acidity (as H₂SO₄): 37.5 - 38.6 %

Insoluble and by ammoniumhydroxide precipitated matter: ≤ 0.01 %

Chloride (Cl): ≤ 0.0005 % Phosphate (PO₄): ≤ 0.001 %

Total nitrogen (N): ≤ 0.002 %

Heavy metals (as Pb): ≤ 0.001 %

Al (Aluminium): ≤ 0.001 %

As (Arsenic): ≤ 0.0005 %

Ca (Calcium): ≤ 0.002 %

Fe (Iron): ≤ 0.0005 %

Mg (Magnesium): ≤ 0.0005 %

Na (Sodium): ≤ 0.01 %

Water (H₂O): ≤ 2.5 %