1.05057

Potassium disulfite

for analysis EMSURE^®

• Synonym(s): Potassium disulfite, Potassium metabisulfite, Potassium pyrosulfite
• Empirical Formula (Hill Notation): K₂O₅S₂
• CAS Number: 16731-55-8
• Molecular Weight: 222.32
• MDL number: MFCD00167605
• UNSPSC Code: 12352302
• EC Index Number: 240-795-3

Properties

• Quality Level: 300
• product line: EMSURE^®
• Assay: ≥96% (iodometric)
• form: solid
• potency: 2300 mg/kg LD₅₀, oral (Rat)
• impurities: ≤0.005% In water insoluble matter
• pH: 3.0-4.5 (20 °C, 50 g/L in H₂O)
• mp: 150 °C (decomposition)
• solubility: 450 g/L
• bulk density: 1000‑1300 kg/m³
• anion traces: chloride (Cl^-): ≤0.005%
• cation traces: As: ≤0.0001%; Cu: ≤0.001%; Fe: ≤0.0005%; Pb: ≤0.001%; Zn: ≤0.001%
• storage temp.: 2-30°C
• InChI: 1S/2K.H2O5S2/c;;1-6(2)7(3,4)5/h;;(H,1,2)(H,3,4,5)/q2*+1;/p-2
• InChI key: RWPGFSMJFRPDDP-UHFFFAOYSA-L

Description

Analysis Note

Assay (iodometric): ≥ 96 %
In water insoluble matter: ≤ 0.005 %
Chloride (Cl): ≤ 0.005 %
As (Arsenic): ≤ 0.0001 %
Cu (Copper): ≤ 0.001 %
Fe (Iron): ≤ 0.0005 %
Pb (Lead): ≤ 0.001 %
Zn (Zinc): ≤ 0.001 %

Legal Information

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

Safety Information

• Pictograms: GHS05,GHS07
• Signal Word: Danger
• Hazard Statements: H318 - H335
• Precautionary Statements: P261 - P271 - P280 - P304 + P340 + P312 - P305 + P351 + P338 - P403 + P233
• Hazard Classifications: Eye Dam. 1 - STOT SE 3
• Target Organs: Respiratory system
• Supplementary Hazards: EUH031
• Storage Class Code: 13 - Non Combustible Solids
• WGK: WGK 1