Molekula

Sodium metabisulfite

SKU 33231649 CAS 7681-57-4 Na2O5S2 MW 190.11 In stock

Sodium metabisulfite is a white crystalline powder used as a reducing agent, preservative, and antioxidant in food, pharmaceuticals, and industrial processes. It is also employed in photographic chemicals and water treatment. CAS: 7681-57-4, Molecular Formula: Na2O5S2, Molecular Weight: 190.11 g/mol, Storage: Ambient, Signal Word: Danger. Molekula supplies Sodium metabisulfite from research to bulk quantities with full documentation and ISO 9001:2015 traceability.

CoA by batch Download specification

Overview

Pricing & pack sizes

Pack sizes & pricing

£ GBP € EUR $ USD

500 g — £20.00 per pack
1 kg — £26.40 per pack

Prices exclude VAT/sales tax and shipping. Bulk and custom pack sizes available on request.

Specifications

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Property	Value
Appearance	Fine Crystals
Heavy metals	≤10mg/kg max
Identification	Conforms to reference
Assay	≥98%
Iron as Fe	≤5mg/kg
Lead as Pb	≤2mg/kg
Arsenic as As	≤1mg/kg
Mercury as Hg	≤1mg/kg
Cadmium as Cd	≤1mg/kg
Nickel (Ni)	≤1mg/kg
Chromium (Cr)	≤1mg/kg
Antimony (Sb)	≤1mg/kg
Selenium (Se)	≤1mg/kg
Thiosulfates	≤0.04%

Storage & handling

Property	Value
Storage Temperature	Ambient
Shelf Life	24 months
Acidity	Neutral

Identification

Property	Value
SKU	33231649
CAS Number	7681-57-4
Molecular Formula	Na2O5S2
Molecular Weight	190.11
SMILES	[O-]S(=O)S(=O)(=O)[O-].[Na+].[Na+]
REACH Code	Y110
TSCA Listed	Yes
HTS Code	28321000
Tariff Code	2832100000

Safety & GHS

Danger

Corrosive GHS05
Health Hazard GHS07

Hazard statements

EUH031 Contact with acids liberates toxic gas
H302 Harmful if swallowed
H318 Causes serious eye damage

Precautionary statements

P264 Wash thoroughly after handling
P280 Wear protective gloves/protective clothing/eye protection/face protection
P301+312 IF SWALLOWED: Call a POISON CENTER or doctor/physician if you feel unwell
P305+351+338 IF IN EYES: Rinse with water for several minutes. Remove contact lenses if present and easy to do. Continue rinsing
P333+313 IF skin irritation or a rash occurs: Get medical advice/attention
P337+313 If eye irritation persists get medical advice/attention

For research and industrial use only

Not for use in food, drugs, household, or in or on humans or animals. Consult the Safety Data Sheet before handling.

Documents

Safety Data Sheets (SDS)

Available in IT, FR, ES, DE, EN.

Certificate of Analysis (CoA) by batch

Enter a lot or batch number to retrieve the CoA for that specific batch. We can generate one from spec data if no PDF is on file.

Synonyms

No alternate names recorded for this product.

Frequently asked questions

What is sodium metabisulfite used for?

Sodium metabisulfite is commonly used as a preservative in food and beverages, a reducing agent in chemical processes, and in water treatment to control microbial growth.

What is the chemical formula and molecular weight of sodium metabisulfite?

The formula is Na2O5S2 and the molecular weight is 190.11 g/mol.

How should sodium metabisulfite be stored?

It should be stored at ambient temperature in a dry, well-ventilated area away from incompatible materials.

What grade is available for sodium metabisulfite?

Available in technical and food-grade qualities; specific grades depend on customer requirements and application.

Can Molekula supply sodium metabisulfite in bulk?

Yes, Molekula can supply sodium metabisulfite in bulk quantities; please contact our sales team for pricing and availability.

What documentation comes with a sodium metabisulfite order?

Each order includes a Certificate of Analysis (CoA) and Safety Data Sheet (SDS); additional documentation can be provided upon request.

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