1.05134

Potassium sulfide

small lumps for analysis EMSURE^®

• Synonym(s): Potassium sulfide, Potassium monosulfide
• Linear Formula: (l · K₂S)(m · K₂S_x)(n · K₂S₂O₃)
• CAS Number: 39365-88-3
• MDL number: MFCD00064604
• UNSPSC Code: 12352302
• NACRES: NA.21

Properties

• Quality Level: 300
• product line: EMSURE^®
• form: solid
• concentration: ≥44% (complexometric K₂S basis)
• pH: 13 (20 °C, 10 g/L in H₂O)
• mp: 200-250 °C
• solubility: 500 g/L
• density: 1.65 g/cm³ at 20 °C
• bulk density: 1000‑1200 kg/m³
• anion traces: sulfite (SO₃^2-): ≤1%; thiosulfate (S₂O₃^2-): ≤20
• cation traces: N: ≤0.01%
• storage temp.: no temp limit
• InChI: 1S/4K.H2O3S2.S/c;;;;1-5(2,3)4;/h;;;;(H2,1,2,3,4);/q;;2*+1;;/p-2
• InChI key: PFSBHPPVZHPSCB-UHFFFAOYSA-L

Description

Analysis Note

Assay (complexometric, as K₂S): ≥ 44 %
Sulfite (SO₃): ≤ 1 %
Thiosulfate (S₂O₃): about 20
Total nitrogen (N): ≤ 0.01 %

Legal Information

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

Safety Information

• pictograms: GHS05,GHS09
• signalword: Danger
• hcodes: H314 - H400
• pcodes: P260 - P273 - P280 - P301 + P330 + P331 - P303 + P361 + P353 - P305 + P351 + P338
• Hazard Classifications: Aquatic Acute 1 - Eye Dam. 1 - Skin Corr. 1B
• supp_hazards: EUH031
• Storage Class: 8A - Combustible, corrosive hazardous materials
• wgk_germany: WGK 3