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60235

Sigma-Aldrich

Potassium disulfate

puriss. p.a., ≥97.5% (T)

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Synonym(s):
Potassium pyrosulfate
Empirical Formula (Hill Notation):
K2S2O7
CAS Number:
Molecular Weight:
254.32
EC Number:
MDL number:
PubChem Substance ID:
NACRES:
NA.21

grade

puriss. p.a.

Quality Level

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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Potassium disulfate puriss. p.a., ≥97.5% (T)

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Potassium disulfate ReagentPlus®, 99%

Sigma-Aldrich

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Potassium disulfate

Potassium disulfite for analysis EMSURE®

Supelco

1.05057

Potassium disulfite

assay

≥97.5% (T)

assay

≥98%

assay

99%

assay

≥96% (iodometric)

form

powder or crystals

form

powder

form

powder

form

solid

impurities

≤0.002% total nitrogen (N)

impurities

-

impurities

-

impurities

≤0.005% In water insoluble matter

pH

1-2 (25 °C, 25.5 g/L)

pH

-

pH

-

pH

3.0-4.5 (20 °C, 50 g/L in H2O)

density

2.28 g/mL at 25 °C (lit.)

density

-

density

2.28 g/mL at 25 °C (lit.)

density

-

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

CorrosionSkull and crossbones

Signal Word

Danger

Hazard Statements

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


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Z. Sulcek et al.
Methods of Decomposition in Inorganic Analysis (1989)
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)
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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