Sodium Metabisulfite

Name: Sodium Metabisulfite
Brand: Vaqora Chemicals
SKU: VQ-014173

About Sodium Metabisulfite

Listed under CAS 7681-57-4, Sodium Metabisulfite is an alkali metal compound available from Vaqora Chemicals. Formula Na2O5S2, molecular weight 190.11 g/mol. It is also known as Disulfurous acid, disodium salt or Covastyle MBS.

Store in a tightly closed container in a cool, dry and well-ventilated place. Under GHS it is labelled “Danger”, so handle it with suitable PPE and consult the SDS.

It is commonly used for materials research and chemical synthesis. Typical end-use sectors are academic and industrial research.

We offer Sodium Metabisulfite in 10 mg, 25 mg, 50 mg and 100 mg packs with a batch-specific COA, and ship to customers worldwide. This item is currently in stock for prompt dispatch. A Safety Data Sheet (SDS) and technical specifications are available on request.

Typical applications

Materials research
Chemical synthesis

Industries

Specifications & identifiers

Chemical identifiers
Product name	Sodium Metabisulfite
Catalogue No.	VQ-014173
CAS Number	7681-57-4
Other CAS	33669-61-3, 16731-55-8
Molecular formula	Na₂O₅S₂
Molecular weight	190.11 g/mol
Exact mass	189.8983
Grade	Reference Standard
InChIKey	HRZFUMHJMZEROT-UHFFFAOYSA-L
SMILES	[O-]S(=O)S(=O)(=O)[O-].[Na+].[Na+]
PubChem CID	656671

Physical properties
Physical form	Other
H-bond donors / acceptors	0 / 6
TPSA	125 Å²
Synonyms	Disulfurous acid, disodium salt, Covastyle MBS, Disodium disulfite, Sobisu, Sodium disulfite (Na2S2O5), Sodium metabisulfite (Na2S2O5), Sodium pyrosulfite, Sodium pyrosulfite (Na2S2O5), Sodium sulfur oxide (Na2S2O5), Sodium disulfite, Disodium pyrosulfite, Natrii disulfis

Safety & hazard information (GHS)

Corrosive

Harmful / irritant

Signal word: Danger

Hazard statements

H302Harmful if swallowed
H318Causes serious eye damage

Precautionary statements: P264, P264 + P265, P270, P280, P301 + P317, P305 + P354 + P338, P317, P330, P501

Classification is indicative (aggregated GHS notifications) and may vary by grade and concentration. Always refer to the SDS supplied with your lot.

Documents

Safety Data Sheet (SDS)16-section GHS · on request Certificate of AnalysisTypical / batch COA · on request Specification sheetTDS / MOA · on request

Other grades of CAS 7681-57-4

EP/Ph. Eur.

Sodium Metabisulfite, EP/Ph. Eur.

CAS: 7681-57-4
Formula: Na₂O₅S₂
MW: 190.11 g/mol

VQ-047033

Food Grade

Sodium Metabisulfite, food grade (FCC)

CAS: 7681-57-4
Formula: Na₂O₅S₂
MW: 190.11 g/mol

VQ-045591

IP/BP/USP/EP/Ph. Eur.…

Sodium Metabisulfite, IP/BP/USP/EP/Ph. Eur., ACS, AR

CAS: 7681-57-4
Formula: Na₂O₅S₂
MW: 190.11 g/mol

VQ-047185

LR / Food Grade

Sodium Metabisulfite, LR, food grade (FCC)

CAS: 7681-57-4
Formula: Na₂O₅S₂
MW: 190.11 g/mol

VQ-047186

Extra Pure

Sodium metabisulphite, 98%

CAS: 7681-57-4
Formula: Na₂O₅S₂
MW: 190.11 g/mol

VQ-000976

AR

Sodium metabisulphite, GR 98%+

CAS: 7681-57-4
Formula: Na₂O₅S₂
MW: 190.11 g/mol

VQ-000977

Frequently asked questions

What is the CAS number of Sodium Metabisulfite?

The CAS Registry Number of Sodium Metabisulfite is 7681-57-4. It is also known as Disulfurous acid, disodium salt, Covastyle MBS, Disodium disulfite.

What is the molecular formula and molecular weight of Sodium Metabisulfite?

Sodium Metabisulfite has the molecular formula Na2O5S2 and a molecular weight of 190.11 g/mol.

Which grade and pack sizes of Sodium Metabisulfite can I order?

We supply Sodium Metabisulfite in Reference Standard grade, in 10 mg, 25 mg, 50 mg, 100 mg, 250 mg, 500 mg packs. Larger bulk quantities and custom packing are quoted on request.

Do you provide a COA and SDS with Sodium Metabisulfite?

Yes. Every lot of Sodium Metabisulfite is shipped with a batch-specific Certificate of Analysis, and a 16-section GHS Safety Data Sheet is provided with the quotation and the shipment.

Can Sodium Metabisulfite be shipped internationally?

Yes. Sodium Metabisulfite is classified as hazardous, so it is packed in UN-approved packaging and shipped as dangerous goods under IATA/IMDG rules. We export worldwide on EXW, FOB, CIF and DAP terms.