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Sigma-Aldrich

Sodium metabisulfite

SAJ special grade, ≥97.0%

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:
12352300
PubChem Substance ID:
329753190

grade

SAJ special grade

Assay

≥97.0%

form

powder

availability

available only in Japan

pH

4.5 (20 °C, 50 g/L)

mp

>300 °C (lit.)

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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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

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

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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