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60235

Sigma-Aldrich

Potassium disulfate

puriss. p.a., ≥97.5% (T)

Synonym(s):

Potassium pyrosulfate

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About This Item

Empirical Formula (Hill Notation):
K2S2O7
CAS Number:
7790-62-7
Molecular Weight:
254.32
EC Number:
232-216-8
MDL number:
MFCD00011385
UNSPSC Code:
12352302
PubChem Substance ID:
329758835
NACRES:
NA.21

grade

puriss. p.a.

Quality Level

200

Assay

≥97.5% (T)

form

powder or crystals

impurities

≤0.002% total nitrogen (N)

pH

1-2 (25 °C, 25.5 g/L)

density

2.28 g/mL at 25 °C (lit.)

anion traces

chloride (Cl-): ≤5 mg/kg
phosphate (PO43-): ≤10 mg/kg

cation traces

Ag: ≤5 mg/kg
Al: ≤5 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

SMILES string

[K+].[K+].[O-]S(=O)(=O)OS([O-])(=O)=O

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

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General description

Potassium disulfite (Potassium pyrosulfate) has been synthesized from potassium hydrogen sulfate, via melting.

Application

Potassium disulfite supported on silica may be used for the synthesis of ethyl pyruvate.

Other Notes

Reagent for the decomposition of basic metal oxides by fusion

Pictograms

Skull and crossbonesCorrosion
GHS06,GHS05

Signal Word

Danger

Hazard Statements

H314,H331

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

Certificates of Analysis (COA)

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R. Bock
Aufschlussmethoden der anorg. & org. Chemie (1972)
Catalytic Conversion of Diethyl Tartrate into Pyruvate over Silica-Supported Potassium Disulfate.
Sugiyama S, et al.
Bulletin of the Chemical Society of Japan, 65(8), 2083-2085 (1992)
Z. Sulcek et al.
Methods of Decomposition in Inorganic Analysis (1989)
Laura Schneider et al.
Bioresource technology, 234, 1-7 (2017-03-21)
The catalytic conversion of lignocellulosic biomass is attractive due to the feasible generation of valuable products such as reducing sugars which constitute the basic substrates for chemical and transportation fuel production, as well as the production of renewable hydrogen. This
Chromate dermatitis and sodium dithionite.
L M Wall
Contact dermatitis, 8(5), 291-293 (1982-09-01)
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