Sodium Metabisulphite (Food Grade)
White to off-white crystalline powder · CAS 7681-57-4
DocumentsSpec sheet (PDF, 31 KB)Safety Data Sheet (PDF, 81 KB)
This is one of 7 grades in our Sodium Metabisulphite (SMBS) — Industrial and Food Grades. Compare all 7 grades →
Overview
Sodium Metabisulphite (Food Grade) is the food-safe grade of SMBS (CAS 7681-57-4, INS 223) — the same white to off-white crystalline compound, supplied in food-grade 25/50 kg bags for preservative and anti-browning use in food and beverages. It's a standard sulphiting agent in wine and fruit-juice processing, a preservative for dried fruit and seafood, and a processing aid in bakery and starch applications.
Specification Sheet — Characteristics
Download Specification Sheet (PDF)| Characteristics | Specifications |
|---|---|
| Grade Tested | Sodium Metabisulphite, Food Grade |
| SO2 Content | 64.27% |
| Purity | 95.45% |
These values come from our own lab test on Sodium Metabisulphite. They vary slightly from batch to batch, so ask for a current certificate of analysis with your order.
Applications
- Food and beverage preservative and anti-browning agent
- Wine and fruit-juice processing sulphiting agent
- Dried-fruit and seafood preservative
- Bakery and starch-processing aid
Safety & Handling Summary
| Topic | Summary |
|---|---|
| Signal word | Warning |
| GHS hazards | H302 — Harmful if swallowed H315 — Causes skin irritation H319 — Causes serious eye irritation H335 — May cause respiratory irritation |
| Incompatible with | Acids, moisture, powdered alkali/alkaline-earth metals, oxidising agents, chlorates |
| Gloves | Chemical-resistant gloves (nitrile or PVC) |
| Eye / face | Chemical safety goggles |
| Respiratory | Dust mask for routine handling; use a NIOSH-approved acid-gas cartridge respirator if sulphur dioxide odour is detected. SCBA for spill response in enclosed spaces |
| Body | Protective clothing/food-industry workwear as needed to prevent excessive dust contact |
| Transport (road) | Confirm the shipping classification with us before dispatch — see Section 14 of the SDS |
| Emergency handling | First aid, fire-fighting and spill / release measures are in Sections 4–6 of the SDS. Emergency contact: +91 70927 22822 / +91 98402 84032. |
A summary of the Sodium Metabisulphite Safety Data Sheet. The full SDS is the authority: download it at the top of this page and read it before first use. Hazard ratings can change with grade and concentration, so confirm the transport class for each consignment.
Frequently Asked Questions
What is Sodium Metabisulphite (Food Grade)?
Sodium Metabisulphite is supplied by Suraj Chemicals as white to off-white crystalline powder, identified by CAS number 7681-57-4. It falls under our Food & Industrial Additives range — see the Specification Sheet table above for its full characteristics.
What is Sodium Metabisulphite used for?
Typical applications include: Food and beverage preservative and anti-browning agent; Wine and fruit-juice processing sulphiting agent; Dried-fruit and seafood preservative; Bakery and starch-processing aid.
How should Sodium Metabisulphite be stored and handled?
Store sealed in a dry, cool area away from moisture and oxidizers — releases SO₂ gas when damp.
What packaging and pack sizes does Suraj Chemicals supply Sodium Metabisulphite in?
25/50 kg food-grade bags. Contact us if you need a different pack size, or a bulk/tanker quantity.
What is the shelf life of Sodium Metabisulphite?
Typically 3–6 months from date of manufacture when stored sealed, in a cool place away from direct sunlight and heat. Active content in hypochlorite / oxidising products declines gradually over time, so this is one to watch closely. As with any industrial chemical, request the current batch's manufacturing date and a fresh certificate of analysis for orders where exact remaining shelf life matters.
Is Sodium Metabisulphite hazardous to handle?
Yes. Sodium Metabisulphite is classified under GHS (signal word: Warning) as: harmful if swallowed (H302); causes skin irritation (H315); causes serious eye irritation (H319); may cause respiratory irritation (H335). Follow the storage and handling guidance above, use appropriate PPE, and download the Safety Data Sheet (SDS/MSDS) in the sidebar above for full GHS hazard, handling and PPE details.
Is a Specification Sheet, TDS or MSDS available for Sodium Metabisulphite?
Yes. a downloadable Specification Sheet (PDF) with full characteristics and specifications is available above, and a downloadable Safety Data Sheet (SDS/MSDS) for Sodium Metabisulphite is also available above.
Can I get a sample or discuss order quantity for Sodium Metabisulphite?
Yes. use the Request Price & Availability button or WhatsApp us with your required quantity, and our team will confirm pricing, minimum order quantity, sample availability and delivery timelines for Sodium Metabisulphite.
Actual packaging as supplied by Suraj Chemicals
CAS Number
7681-57-4
Also Known As
Sodium Metabisulfite, SMBS, INS 223
Chemical Formula
Na2S2O5
Grade
Food Grade
Appearance
White to off-white crystalline powder
Packaging
25/50 kg food-grade bags
Storage & Handling
Store sealed in a dry, cool area away from moisture and oxidizers — releases SO₂ gas when damp.
Shelf Life
Typically 3–6 months from date of manufacture when stored sealed, in a cool place away from direct sunlight and heat. Active content in hypochlorite / oxidising products declines gradually over time, so this is one to watch closely. As with any industrial chemical, request the current batch's manufacturing date and a fresh certificate of analysis for orders where exact remaining shelf life matters.