Potassium metabisulphite, 95%

Name: Potassium metabisulphite, 95%
Brand: Vaqora Chemicals
SKU: VQ-014048

About Potassium metabisulphite, 95%

Potassium metabisulphite is an alkali metal compound carrying the CAS registry number 16731-55-8 with a typical assay of 98%. The compound has the formula K2O5S2, corresponding to a molecular weight of 222.33 g/mol. Common synonyms include Potassium disulfite and Potassium pyrosulfite.

It is supplied as a powder or crystals or crystalline powder, white, passes test. Store in a tightly closed container in a cool, dry and well-ventilated place. It carries the GHS signal word “Danger” with 3 hazard statements. Review the Safety Data Sheet before use.

Key uses span antioxidant additive and materials research. Typical end-use sectors are academic and industrial research.

We offer Potassium metabisulphite in 500 g, 5 kg and 4 x 25 kg packs with a batch-specific COA, and ship to customers worldwide.

Typical applications

Antioxidant additive
Materials research

Industries

Specifications & identifiers

Chemical identifiers
Product name	Potassium metabisulphite, 95%
Catalogue No.	VQ-014048
CAS Number	16731-55-8
Molecular formula	K₂O₅S₂
Molecular weight	222.33 g/mol
Exact mass	221.8461
Purity / assay	98%
HSN code	28322010
InChIKey	RWPGFSMJFRPDDP-UHFFFAOYSA-L
SMILES	[O-]S(=O)S(=O)(=O)[O-].[K+].[K+]
PubChem CID	28019

Physical properties
Physical form	Crystalline
Appearance	Powder or crystals or crystalline powder, white, passes test
H-bond donors / acceptors	0 / 6
TPSA	125 Å²
Synonyms	Potassium disulfite, Potassium pyrosulfite, Dipotassium pyrosulfite, Dipotassium disulfite, Dipotassium metabisulfite, Potassium disulfite (K2S2O5), Potassium pentaoxodisulfate, Pyrosulfurous acid, dipotassium salt, Ins-224, Potassium metabisulfite (e 224), Disulfurous acid, potassium salt (1:2), Potassium metabisulfite [NF]

Safety & hazard information (GHS)

Corrosive

Harmful / irritant

Signal word: Danger

Hazard statements

H315Causes skin irritation
H318Causes serious eye damage
H335May cause respiratory irritation

Precautionary statements: P261, P264, P264 + P265, P271, P280, P302 + P352, P304 + P340, P305 + P354 + P338, P317, P319, P321, P332 + P317, P362 + P364, P403 + P233, P405, 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 16731-55-8

BP/USP/EP/Ph. Eur. / …

Potassium metabisulphite, BP/USP/EP/Ph. Eur., AR, food grade (FCC)

CAS: 16731-55-8
Formula: K₂O₅S₂
MW: 222.33 g/mol

VQ-047233

Food Grade

Potassium metabisulphite, food grade (FCC)

CAS: 16731-55-8
Formula: K₂O₅S₂
MW: 222.33 g/mol

VQ-046915

AR

Potassium metabisulphite, GR 98%+

CAS: 16731-55-8
Formula: K₂O₅S₂
MW: 222.33 g/mol

VQ-014049

Frequently asked questions

What is the CAS number of Potassium metabisulphite, 95%?

The CAS Registry Number of Potassium metabisulphite, 95% is 16731-55-8. It is also known as Potassium disulfite, Potassium pyrosulfite, Dipotassium pyrosulfite.

What is the molecular formula and molecular weight of Potassium metabisulphite, 95%?

Potassium metabisulphite, 95% has the molecular formula K2O5S2 and a molecular weight of 222.33 g/mol.

Which grade and pack sizes of Potassium metabisulphite, 95% can I order?

We supply Potassium metabisulphite, 95% in (98%) grade, in 500 g, 5 kg, 4 x 25 kg packs. Larger bulk quantities and custom packing are quoted on request.

Do you provide a COA and SDS with Potassium metabisulphite, 95%?

Yes. Every lot of Potassium metabisulphite, 95% 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 Potassium metabisulphite, 95% be shipped internationally?

Yes. Potassium metabisulphite, 95% 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.