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Sodium metabisulfite

Name: Sodium metabisulfite
Brand: SIGALD

reagent grade, 97%

Synonym(s):

Sodium disulfite, Sodium pyrosulfite

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About This Item

Linear Formula:

Na₂S₂O₅

CAS Number:

7681-57-4

Molecular Weight:

190.11

NACRES:

NA.55

PubChem Substance ID:

329751131

UNSPSC Code:

12352302

EC Number:

231-673-0

MDL number:

MFCD00167602

Assay:

97%

Grade:

reagent grade

Form:

powder or crystals

Solubility:

water: soluble 650 g/L at 20 °C

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Properties

grade

reagent grade

Quality Segment

100

assay

97%

form

powder or crystals

pH

4.5 (20 °C, 50 g/L)

mp

>300 °C (lit.)

solubility

water: soluble 650 g/L at 20 °C

SMILES string

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

InChI

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

InChI key

HRZFUMHJMZEROT-UHFFFAOYSA-L

Description

General description

Sodium metabisulfite (MBS, Sodium disulfite) is the sodium salt of disulphurous (pyrosulfurous) acid. It is also commonly added to various food products and wines as a preservative.

Application

Sodium metabisulfite may be used to initiate the cross-linking of polybutadiene by free radical polymerization. It may be used to prevent the oxidation (as antioxidant) during the preparation of stock solutions of 6-hydroxydopamine (6-OHDA) and 6-OHDA HBr in various studies.

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Pictograms

GHS05,GHS07

Signal Word

Danger

Hazard Codes

H302,H318

Precautionary Statements

P264 - P270 - P280 - P301 + P312 - P305 + P351 + P338 - P501

Hazard Classifications

Acute Tox. 4 Oral - Eye Dam. 1

supp_hazards

EUH031

Storage Class

13 - Non Combustible Solids

WGK

WGK 1

Flash Point (°F)

Not applicable

Flash Point (°C)