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Merck
CN

60235

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:
Molecular Weight:
254.32
NACRES:
NA.21
PubChem Substance ID:
UNSPSC Code:
12352302
EC Number:
232-216-8
MDL number:
Assay:
≥97.5% (T)
Form:
powder or crystals
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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

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


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pictograms

Skull and crossbonesCorrosion

signalword

Danger

hcodes

Hazard Classifications

Acute Tox. 3 Inhalation - Eye Dam. 1 - Skin Corr. 1A

Storage Class

6.1B - Non-combustible acute toxic Cat. 1 and 2 / very toxic hazardous materials

wgk

WGK 3



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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
R. Bock
Aufschlussmethoden der anorg. & org. Chemie (1972)



Global Trade Item Number

SKUGTIN
60235-1KG04061826714836