
Technical Data Sheet · Version 1.0 · Issued 02 July 2026
Technical Data Sheet
Caustic Soda Flakes
Product Description
Chemical Composition
| Component | CAS Number | % w/w |
|---|---|---|
| Sodium Hydroxide | 1310-73-2 | ≥99% |
| Impurities (mainly moisture and sodium carbonate) | Consult product label | <1% |
Physical & Chemical Properties
| ph | 14 (in aqueous solution) |
| odour | Odorless |
| colour | Colorless white |
| viscosity | Not applicable (solid) |
| appearance | White solid flakes |
| solubility | Highly soluble in water |
| flash point | Non-flammable |
| boiling point | 1388 °C |
| specific gravity | 2.13 g/cm³ (solid) |
Performance Data & Dosage
| contact time | Varies by application; generally 10-30 minutes in water treatment |
| compatibility | Water, Acids (for neutralization reactions), Alkalis, Most metals (corrosive, avoid aluminum, zinc) |
| dilution ratio | Consult product label or application guidelines |
| incompatibility | Strong acids (uncontrolled mixing), Aluminum, zinc, tin, Organic materials prone to exothermic reactions, Flammable materials |
| recommended dosage | Depends on application; typically 50-200 mg/L for water treatment |
| treatment temperature | Ambient to 80 °C depending on use |
Applications & Industries
Applications
- Water treatment
- Detergent manufacturing
- Textile processing
- Paper manufacturing
- Soap production
- Petroleum refining
- Food processing
Industries Served
Health & Safety (GHS)
Signal Word: Danger
Hazard Class: Corrosive to metals (Category 1), Skin corrosion/irritation (Category 1A), Serious eye damage/eye irritation (Category 1)
Hazard Statements:
- H290: May be corrosive to metals
- H314: Causes severe skin burns and eye damage
PPE Required:
first aid skin
Immediately flush skin with plenty of water for at least 15 minutes while removing contaminated clothing. Seek medical attention.
first aid eyes
Rinse cautiously with water for at least 15 minutes. Remove contact lenses if present. Seek immediate medical attention.
first aid ingestion
Do NOT induce vomiting. Rinse mouth with water. Seek immediate medical assistance.
Storage & Handling
| disposal | Dispose of contents/container in accordance with local regulations. Do not release into environment. |
| shelf life | 24 months when stored as recommended |
| container material | Corrosion-resistant materials such as HDPE or polyethylene-lined metal drums |
| storage conditions | Keep container tightly closed in a cool, dry, well-ventilated area away from moisture and incompatible materials |
| storage temperature | Store between 10°C and 30°C |
Packaging & Transport
| un number | 1823 |
| packing group | II |
| transport class | 8 (Corrosive substances) |
Standards & Compliance
| Standard | Scope |
|---|---|
| KEBS KS EAS 67:2017 | Specification for caustic soda flakes |
| ISO 9001:2015 | Quality management systems |
Frequently Asked Questions
Is bulk discounting available?
Yes, tiered pricing applies for orders exceeding 500kg. Contact sales for quotes.
What is the minimum order quantity?
The standard MOQ is 25kg pallet bags for Caustic Soda Flakes.
Is Caustic Soda Flakes safe to handle?
It is corrosive; use protective gloves and eyewear during handling.
Do you supply to all East African countries?
Yes, including Kenya, Uganda, Tanzania, Rwanda, Burundi, South Sudan, Ethiopia, Somalia, and DRC.
What packaging sizes are available?
Common packaging includes 25kg bags and 200kg drums.
Want a downloadable copy of this datasheet?
Contact our technical team and we will send you the full official PDF directly to your inbox.
Related Products
Explore Zenco Chemicals' range of water treatment chemicals, detergent raw materials, and industrial chemical products designed to meet East Africa's industrial demand. Please visit /products/water-treatment-chemicals, /products/category/detergent-chemicals, or /products/industrial-chemicals for more options.


