1.05107

Potassium disulfate (Potassium pyrosulfate)

for analysis EMSURE^® ACS

• Synonym(s): Potassium disulfate (Potassium pyrosulfate), Potassium pyrosulfate
• Empirical Formula (Hill Notation): K₂O₇S₂
• CAS Number: 7790-62-7
• Molecular Weight: 254.32
• MDL number: MFCD00011385
• UNSPSC Code: 12352302
• EC Index Number: 232-216-8
• NACRES: NA.21

Properties

• grade: ACS reagent
• Quality Level: 300
• product line: EMSURE^®
• Assay: 97.5-100.0% (K₂S₂O₇ basis, acidimetric)
• form: solid
• impurities: ≤0.01% Insoluble and by ammoniumhydroxide precipitated matter; ≤2.5% Water; 37.5-38.6% Acidity (as H₂SO₄)
• pH: 0.8 (20 °C, 50 g/L in H₂O)
• mp: 325 °C
• bulk density: 830 kg/m³
• anion traces: chloride (Cl^-): ≤0.0005%; phosphate (PO₄^3-): ≤0.001%
• cation traces: Al: ≤0.001%; As: ≤0.0005%; Ca: ≤0.002%; Fe: ≤0.0005%; Mg: ≤0.0005%; N: ≤0.002%; Na: ≤0.01%; heavy metals (as Pb): ≤0.001%
• storage temp.: no temp limit
• InChI: 1S/2K.H2O7S2/c;;1-8(2,3)7-9(4,5)6/h;;(H,1,2,3)(H,4,5,6)/q2*+1;/p-2
• InChI key: KAQHZJVQFBJKCK-UHFFFAOYSA-L

Description

Linkage

Replaces: PX1581; PX1581-1; PX1581-3; PX1581-20; PX1581-5W; PX1581-5

Analysis Note

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 %
Conforms ACS.

Legal Information

EMSURE is a registered trademark of Merck KGaA, Darmstadt, Germany

Safety Information

• Pictograms: GHS06,GHS05
• Signal Word: Danger
• Hazard Statements: H314,H331
• Precautionary Statements: P260 - P271 - P280 - P303 + P361 + P353 - P304 + P340 + P310 - P305 + P351 + P338
• Hazard Classifications: Acute Tox. 3 Inhalation - Eye Dam. 1 - Skin Corr. 1A
• Storage Class Code: 6.1B - Non-combustible acute toxic Cat. 1 and 2 / very toxic hazardous materials
• WGK: WGK 3