Technical Data Sheet · Version 1.0 · Issued 02 July 2026
Technical Data Sheet
Sodium Hydrosulfite
Zenco Chemicals LtdCategory: Paper & Pulp
DOC REFERENCE
Version: 1.0
Issue: 02 July 2026
Revised: 02 July 2026
CONFIDENTIAL — VIEW ONLY
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Product Description
Sodium Hydrosulfite (Sodium Dithionite, Na2S2O4) is a white to yellow crystalline powder used as a strong reducing and bleaching agent. It is highly soluble in water, effective in textile dye reduction, water dechlorination, pulp and paper bleaching, photographic development, and leather processing. Our product is moisture-sensitive and should be stored in sealed containers in a cool, dry place. Zenco Systems Ltd supplies this high-quality industrial chemical across East Africa including Kenya, Uganda, Tanzania, and Rwanda, meeting stringent quality standards for optimal industrial performance.
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Chemical Composition
| Component | CAS Number | % w/w |
|---|---|---|
| Sodium Hydrosulfite (Sodium Dithionite) | 7775-14-6 | ≥88% |
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Physical & Chemical Properties
| ph | 10 to 11 (1% aqueous solution) |
| odour | Slight sulfur odor |
| colour | White to yellow |
| viscosity | Not applicable (solid powder) |
| appearance | White to yellow crystalline powder |
| solubility | Highly soluble in water |
| flash point | Not applicable (solid, non-flammable) |
| boiling point | Decomposes before boiling |
| specific gravity | 1.36 g/cm³ (solid) |
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Performance Data & Dosage
| contact time | Consult product label or supplier |
| compatibility | Water, Textile dyes, Pulp and paper stock, Leather tanning agents |
| dilution ratio | Consult product label or supplier |
| incompatibility | Oxidizing agents, Acids, Moisture (causes decomposition), Air/Oxygen |
| recommended dosage | Consult product label or supplier |
| treatment temperature | Typically ambient to 60°C depending on application |
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Applications & Industries
Applications
- Textile bleaching and dye reduction
- Water treatment and dechlorination
- Pulp and paper bleaching
- Photographic developer
- Leather processing
Industries Served
Textile industryWater treatment plantsPulp and paper manufacturingLeather tanningPhotography chemicals
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Health & Safety (GHS)
07Harmful05Corrosive08Health
Signal Word: Warning
Hazard Class: Acute Toxicity - Oral (Category 4), Skin Irritation (Category 2), Serious Eye Damage (Category 1), Specific Target Organ Toxicity - Single Exposure (Respiratory Tract Irritation) (Category 3)
Hazard Statements:
- H302: Harmful if swallowed
- H315: Causes skin irritation
- H318: Causes serious eye damage
- H335: May cause respiratory irritation
PPE Required:
Protective gloves Safety goggles Protective clothing Dust mask or respirator
first aid skin
Wash affected area thoroughly with soap and water; remove contaminated clothing.
first aid eyes
Rinse cautiously with water for several minutes. Remove contact lenses if present. Seek medical attention immediately.
first aid ingestion
Rinse mouth; do NOT induce vomiting. Seek immediate medical attention.
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Storage & Handling
| disposal | Dispose of in accordance with local environmental regulations. Avoid release into the environment. |
| shelf life | 12 months if stored under recommended conditions |
| container material | Moisture-proof sealed bags and drums |
| storage conditions | Keep container tightly closed, store in a cool, dry, well-ventilated area away from moisture and oxidizing agents |
| storage temperature | Store below 30°C |
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Packaging & Transport
25kg bags50kg drums200L drums
| un number | UN 2922 |
| packing group | III |
| transport class | Class 4.2 - Substance Liable to Spontaneous Combustion |
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Standards & Compliance
✓ Kenya Bureau of Standards (KEBS) Certified✓ ISO 9001:2015 Quality Management Certified
| Standard | Scope |
|---|---|
| KEBS KS EAS 153:2015 | Industrial Chemicals - Specifications for Sodium Hydrosulfite |
| ISO 9001:2015 | Quality Management System Certification of Supplier |
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Frequently Asked Questions
What is the minimum order quantity?
The standard MOQ is 25kg for Sodium Hydrosulfite; larger orders are available upon request.
How should Sodium Hydrosulfite be stored?
Store in sealed, moisture-proof containers in a cool, dry place to prevent decomposition.
Is bulk discounting available?
Yes, Zenco Systems Ltd offers tiered pricing for orders exceeding 500kg.
Can this chemical be used for water treatment?
Absolutely, it is effective for dechlorination and removing heavy metals in water.
Are there safety guidelines for handling Sodium Hydrosulfite?
Yes, use appropriate protective gear to avoid skin and eye contact.
Zenco Chemicals Ltd — https://zencochemicals.comTDS-SODIUM-HYDROSULFITE-IN-KENYA-TANZANIA · v1.0 · 02 July 2026FOR TECHNICAL REFERENCE ONLY
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