dipotassium (sulfonatooxy)sulfonate

• ChemBase ID: 104543
• Molecular Formular: K2O7S2
• Molecular Mass: 254.3224
• Monoisotopic Mass: 253.8359577
• SMILES: [K+].[K+].[O-]S(=O)(=O)OS(=O)(=O)[O-]
• Canonical SMILES: [O-]S(=O)(=O)OS(=O)(=O)[O-].[K+].[K+]
• InChI: 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
• InChIKey: KAQHZJVQFBJKCK-UHFFFAOYSA-L

NAMES AND DATABASE IDS

Names

• IUPAC name: dipotassium (sulfonatooxy)sulfonate
• IUPAC Traditional name: dipotassium disulfate; dipotassium ion disulfate
• Synonyms: Potassium pyrosulphate; potassium disulfate; Potassium pyrosulfate; Potassium disulfate; Disulfuric acid dipotassium salt; POTASSIUM PYROSULFATE; 无水重硫酸钾; 焦硫酸钾

Database IDs

• CAS Number: 7790-62-7
• EC Number: 232-216-8
• MDL Number: MFCD00011385
• PubChem SID: 24881816; 24858622; 162091883
• PubChem CID: 62681
• Wikipedia Title: Potassium_pyrosulfate

CALCULATED PROPERTIES

• Acid pKa: -3.4438145
• H Acceptors: 6
• H Donor: 0
• LogD (pH = 5.5): -5.8375955
• LogD (pH = 7.4): -5.8375964
• Log P: -1.0847987
• Molar Refractivity: 21.5192 cm^3
• Polarizability: 11.25267 Å^3
• Polar Surface Area: 123.63 Å^2
• Rotatable Bonds: 2
• Lipinski's Rule of Five: true

PROPERTIES

Physical Property

• Solubility: H2O: soluble0.1 M at 20 °C, clear, colorless; soluble in water
• Melting Point: 325°C
• Density: 2.28 g/cm^3; 2.28 g/ml; 2.28 g/mL at 25 °C(lit.)
• Absorption Wavelength: λ: 260 nm Amax: ≤0.021; λ: 280 nm Amax: ≤0.018
• pH: 1.0-2.0 (25 °C, 0.1 M in H2O)

Safety Information

• Storage Condition: Room Temperature (15-30°C), Desiccate
• European Hazard Symbols: Corrosive (C)
• UN Number: 1759; 3260
• German water hazard class: 3
• Hazard Class: 8
• Packing Group: 2; II
• Australian Hazchem: 2X
• Risk Statements: 34; R:34; R36 R38
• Safety Statements: 26-36/37/39-45; S:26-27/28-36/37/39-46-64
• EU Classification: C10
• EU Hazard Identification Number: 8B
• Emergency Response Guidebook(ERG) Number: 154
• GHS Pictograms: GHS05
• GHS Signal Word: Danger
• GHS Hazard statements: H314
• GHS Precautionary statements: P280-P305 + P351 + P338-P310
• Personal Protective Equipment: Eyeshields, Faceshields, full-face particle respirator type N100 (US), Gloves, respirator cartridge type N100 (US), type P1 (EN143) respirator filter, type P3 (EN 143) respirator cartridges
• RID/ADR: UN 3260 8/PG 2

Product Information

• Purity: ≥97.5% (T); ≥98.0%; 99%
• Grade: JIS special grade; puriss. p.a.; ReagentPlus®
• Impurities: ≤0.002% total nitrogen (N); insoluble matter, passes filter test
• Cation Traces: Ag: ≤5 mg/kg; Al: ≤5 mg/kg; As: ≤0.1 mg/kg; As: ≤5 mg/kg; Ba: ≤5 mg/kg; Bi: ≤5 mg/kg; Ca: ≤10 mg/kg; Cd: ≤5 mg/kg; Co: ≤5 mg/kg; Cr: ≤5 mg/kg; Cu: ≤5 mg/kg; Fe: ≤5 mg/kg; Li: ≤5 mg/kg; Mg: ≤5 mg/kg; Mn: ≤5 mg/kg; Mo: ≤5 mg/kg; Na: ≤50 mg/kg; Ni: ≤5 mg/kg; Pb: ≤5 mg/kg; Sr: ≤5 mg/kg; Tl: ≤5 mg/kg; Zn: ≤5 mg/kg
• Antion Traces: chloride (Cl-): ≤5 mg/kg; phosphate (PO43-): ≤10 mg/kg
• λ: 0.1 M in H2O
• Product Line: BioUltra
• Empirical Formula (Hill Notation): K2S2O7

DETAILS

Sigma Aldrich - 307750

Packaging
25, 500 g in poly bottle
Legal Information
ReagentPlus is a registered trademark of Sigma-Aldrich Co. LLC

Sigma Aldrich - 60235

Other Notes
Reagent for the decomposition of basic metal oxides by fusion1,2