Potassium metabisulphite, GR 98%+

Name: Potassium metabisulphite, GR 98%+
Brand: Vaqora Chemicals
SKU: VQ-014049

About Potassium metabisulphite, GR 98%+

Potassium metabisulphite is an alkali metal compound (AR grade) carrying the CAS registry number 16731-55-8 at a purity of ≥98%. With the molecular formula K2O5S2, it has a molar mass of 222.33 g/mol. Alternative names: Potassium disulfite and Potassium metabisulfite.

It is supplied as a white powder. Store it at room temperature in a dry place, in a tightly closed container. Under GHS it is labelled “Danger”, so handle it with suitable PPE and consult the SDS.

It is commonly used for dyes and pigments manufacture and textile processing. Our customers for this product work in academic and industrial research.

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

Typical applications

Dyes & pigments manufacture
Textile processing

Industries

Grade guides

Specifications & identifiers

Chemical identifiers
Product name	Potassium metabisulphite, GR 98%+
Catalogue No.	VQ-014049
CAS Number	16731-55-8
Molecular formula	K₂O₅S₂
Molecular weight	222.33 g/mol
Exact mass	221.8461
Grade	AR
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	Powder
Appearance	White powder
H-bond donors / acceptors	0 / 6
TPSA	125 Å²
Storage	Room temperature
Synonyms	Potassium disulfite, Potassium metabisulfite, 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)

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

Potassium metabisulphite, 95%

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

VQ-014048

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

Frequently asked questions

What is the CAS number of Potassium metabisulphite, GR 98%+?

The CAS Registry Number of Potassium metabisulphite, GR 98%+ is 16731-55-8. It is also known as Potassium disulfite, Potassium metabisulfite, Potassium pyrosulfite.

What is the molecular formula and molecular weight of Potassium metabisulphite, GR 98%+?

Potassium metabisulphite, GR 98%+ has the molecular formula K2O5S2 and a molecular weight of 222.33 g/mol.

Which grade and pack sizes of Potassium metabisulphite, GR 98%+ can I order?

We supply Potassium metabisulphite, GR 98%+ in AR (≥98%) grade, in 500 g, 5 kg, 25 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, GR 98%+?

Yes. Every lot of Potassium metabisulphite, GR 98%+ 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, GR 98%+ be shipped internationally?

Yes. Potassium metabisulphite, GR 98%+ 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.

How should Potassium metabisulphite, GR 98%+ be stored?

Room temperature. Keep the container tightly closed and refer to the SDS for full handling guidance.