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13459

Sigma-Aldrich

Sodium metabisulfite

puriss., meets analytical specification of Ph. Eur., BP, NF, FCC, E223, dry, 97-100.5%

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
EC Number:
231-673-0
MDL number:
MFCD00167602
UNSPSC Code:
12352302
PubChem Substance ID:
329750183
NACRES:
NA.21

grade

puriss.

Assay

97-100.5%

form

powder or crystals

quality

dry
meets analytical specification of Ph. Eur., BP, NF, FCC, E223

composition

SO2, 65.0-67.4%

impurities

residue of solvents, complies
≤0.02% thiosulfate (S2O3)

pH

3.5-5.0 (20 °C, 5%)

mp

>300 °C (lit.)

anion traces

chloride (Cl-): ≤100 mg/kg

cation traces

As: ≤2 mg/kg
Cu: ≤10 mg/kg
Fe: ≤10 mg/kg
Hg: ≤1 mg/kg
Pb: ≤2 mg/kg
Se: ≤5 mg/kg
Zn: ≤10 mg/kg

suitability

complies for appearance of solution

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

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General description

Sodium metabisulfite (MBS, Sodium disulfite) is an inorganic salt. It is the sodium salt of disulphurous (pyrosulfurous) acid. It is widely used as reducing agent in textile and photography industry. It is commonly added to various foods and wines as preservative.

Application

Sodium metabisulfite was used to initiate the cross-linking of polybutadiene in the cores of the vesicle membranes by free radical polymerization in solution. It has been used to prevent the oxidation (as antioxidant) during the preparation of stock solutions of 6-hydroxydopamine in various studies.

Pictograms

CorrosionExclamation mark
GHS05,GHS07

Signal Word

Danger

Hazard Statements

H302,H318

Hazard Classifications

Acute Tox. 4 Oral - Eye Dam. 1

Supplementary Hazards

EUH031

Storage Class Code

13 - Non Combustible Solids

WGK

WGK 1

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Certificates of Analysis (COA)

Search for Certificates of Analysis (COA) by entering the products Lot/Batch Number. Lot and Batch Numbers can be found on a product’s label following the words ‘Lot’ or ‘Batch’.

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W Wright et al.
The American review of respiratory disease, 141(6), 1400-1404 (1990-06-01)
Sodium metabisulfite (MBS) is used as a preservative in food and wine and frequently triggers attacks of asthma. To determine the characteristics of responses to inhaled MBS, 30 asthmatic subjects and 16 nonasthmatic subjects inhaled MBS, in concentrations of 6.2
Johanne Louise Neiiendam et al.
Journal of neurochemistry, 91(4), 920-935 (2004-11-05)
The Neural Cell Adhesion Molecule (NCAM) plays a crucial role in development of the central nervous system regulating cell migration, differentiation and synaptogenesis. NCAM mediates cell-cell adhesion through homophilic NCAM binding, subsequently resulting in activation of the fibroblast growth factor
Zhiliang Cheng et al.
Langmuir : the ACS journal of surfaces and colloids, 24(15), 8169-8173 (2008-06-24)
The ability of chelated Gd to serve as an effective magnetic resonance (MR) contrast agent largely depends on fast exchange rates between the Gd-bound water molecules and the surrounding bulk water. Because water diffuses slowly across lipid bilayers, liposomes with
Laurie H L Sellings et al.
The Journal of neuroscience : the official journal of the Society for Neuroscience, 23(15), 6295-6303 (2003-07-18)
Convergent evidence suggests that amphetamine (AMPH) exerts its rewarding and locomotor stimulating effects via release of dopamine in the nucleus accumbens. However, there is no consensus as to the relative contributions of core and medial shell subregions to these effects.
Eagleson M.
Concise Encyclopedia Chemistry, 337-337 (1994)
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