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Merck
CN

55777

Potassium disulfite

analytical standard

Synonym(s):

E224, Potassium metabisulfite, Potassium pyrosulfite

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About This Item

Linear Formula:
K2S2O5
CAS Number:
16731-55-8
Molecular Weight:
222.32
NACRES:
NA.24
PubChem Substance ID:
329758155
UNSPSC Code:
85151701
EC Number:
240-795-3
MDL number:
MFCD00167605

Key Documents

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Product Name

Potassium disulfite, analytical standard

InChI key

RWPGFSMJFRPDDP-UHFFFAOYSA-L

InChI

1S/2K.H2O5S2/c;;1-6(2)7(3,4)5/h;;(H,1,2)(H,3,4,5)/q2*+1;/p-2

SMILES string

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

grade

analytical standard

assay

≥98% (RT)

shelf life

limited shelf life, expiry date on the label

technique(s)

HPLC: suitable
gas chromatography (GC): suitable

solubility

H2O: 200 mg/mL, clear to very slightly hazy, colorless

application(s)

cleaning products
cosmetics
food and beverages
personal care

format

neat

Quality Level

100

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Application

Refer to the product′s Certificate of Analysis for more information on a suitable instrument technique. Contact Technical Service for further support.

General description

Potassium disulfite (Potassium metabisulfite, PMB) is an inorganic salt with antimicrobial properties. It is a sulfiting agent that prevents browning of foods.

pictograms

Corrosion
GHS05

signalword

Danger

hcodes

H318

Hazard Classifications

Eye Dam. 1

supp_hazards

EUH031

Storage Class

11 - Combustible Solids

wgk

WGK 1

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Certificates of Analysis (COA)

Lot/Batch Number
BCCK2882
BCCF0178
BCBZ4338
BCBS8443V
BCBR5896V

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Sven Hildebrand et al.
Scientific reports, 9(1), 10880-10880 (2019-07-28)
Optical clearing techniques and light sheet microscopy have transformed fluorescent imaging of rodent brains, and have provided a crucial alternative to traditional confocal or bright field techniques for thin sections. However, clearing and labeling human brain tissue through all cortical

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