Technical Data Sheet · Version 1.0 · Issued 02 July 2026
Technical Data Sheet
Sodium Metabisulfite
Zenco Chemicals LtdCategory: Water Treatment
DOC REFERENCE
Version: 1.0
Issue: 02 July 2026
Revised: 02 July 2026
CONFIDENTIAL — VIEW ONLY
1
Product Description
Sodium Metabisulfite is a white crystalline powder with the formula Na2S2O5 and CAS number 7681-57-4. It serves as an antioxidant, preservative, bleaching agent, and water treatment chemical. Widely used in food preservation, textile bleaching, paper manufacturing, dechlorination, and microbial disinfection, it is soluble in water, releasing sulfur dioxide. Zenco Systems Ltd supplies this chemical across East Africa, ensuring consistent quality and reliable logistics.
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Chemical Composition
| Component | CAS Number | % w/w |
|---|---|---|
| Sodium Metabisulfite | 7681-57-4 | ≥ 98% |
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Physical & Chemical Properties
| ph | 4-5 (1% aqueous solution) |
| odour | Sulfur dioxide odor when dissolved in water |
| colour | White |
| viscosity | Not applicable (solid) |
| appearance | White crystalline powder |
| solubility | Soluble in water |
| flash point | Non-flammable solid |
| boiling point | Decomposes before boiling |
| specific gravity | 1.48 g/cm³ (solid) |
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Performance Data & Dosage
| contact time | Consult product label |
| compatibility | Water treatment chemicals, Food additives compliant with regulatory standards, Textile processing agents |
| dilution ratio | Consult product label |
| incompatibility | Strong oxidizing agents, Acids, Reducing agents |
| recommended dosage | Consult product label |
| treatment temperature | Consult product label |
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Applications & Industries
Applications
- Water treatment
- Food preservation
- Textile bleaching
- Paper manufacturing
- Disinfection
- Dechlorination
Industries Served
Food & beverageWater treatment plantsTextile industryPaper industryChemical manufacturing
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Health & Safety (GHS)
07Harmful09Environmental
Signal Word: Warning
Hazard Class: Eye irritation Category 2, Skin irritation Category 2, Respiratory sensitization Category 1
Hazard Statements:
- H315 - Causes skin irritation
- H319 - Causes serious eye irritation
- H334 - May cause allergy or asthma symptoms or breathing difficulties if inhaled
PPE Required:
Protective gloves Safety goggles Dust mask or respirator
first aid skin
Wash thoroughly with plenty of water and soap. Remove contaminated clothing.
first aid eyes
Rinse cautiously with water for at least 15 minutes. Seek medical attention if irritation persists.
first aid ingestion
Rinse mouth with water. Do NOT induce vomiting. Get medical attention immediately.
7
Storage & Handling
| disposal | Dispose of in accordance with local, regional, and national regulations. Avoid release to environment. |
| shelf life | Up to 12 months when stored under recommended conditions |
| container material | Polyethylene-lined bags or HDPE drums |
| storage conditions | Store in a cool, dry, well-ventilated place away from moisture and direct sunlight. Keep container tightly closed. |
| storage temperature | Preferably below 30°C |
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Packaging & Transport
25kg bags50kg drums
| un number | UN2896 |
| packing group | III |
| transport class | 8 (Corrosive substance) |
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Standards & Compliance
✓ KEBS Certified Supplier✓ ISO 9001:2015 Certified Manufacturing Partner
| Standard | Scope |
|---|---|
| KEBS KS EAS 824:2012 | Sodium Metabisulfite - Specification and Test Methods |
| ISO 9001:2015 | Quality Management Systems for Chemical Production |
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Frequently Asked Questions
Is bulk discounting available for Sodium Metabisulfite?
Yes, tiered pricing applies to orders above 500kg. Contact Zenco Systems Ltd sales for details.
What is the typical packaging size?
Common packaging includes 25kg bags and 50kg drums, suitable for East African markets.
How should Sodium Metabisulfite be stored?
Store in a cool, dry place, protected from moisture and air exposure.
Is this product safe for food industry use?
Yes, Sodium Metabisulfite supplied complies with food additive standards.
What industries primarily use Sodium Metabisulfite?
It is used in food processing, water treatment, textiles, and paper manufacturing.
Zenco Chemicals Ltd — https://zencochemicals.comTDS-SODIUM-METABISULFITE-IN-KENYA-TANZANIA · v1.0 · 02 July 2026FOR TECHNICAL REFERENCE ONLY
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