Sodium Hydroxide (Caustic Soda Flakes) – High Purity 99% | Industrial Grade
₹150.00
High purity. Industrial strength. Multi‑purpose. Our Sodium Hydroxide (Caustic Soda Flakes) offers 99% minimum purity. Essential for soap making, drain cleaning, biodiesel production, and pH adjustment. Professional grade – consistent quality batch after batch.
- ✔️ 99% minimum purity – meets industrial standards
- ✔️ Free‑flowing flakes – easy to handle and dissolve
- ✔️ Multi‑purpose – soap making, drain cleaning, water treatment
- ✔️ Sealed tamper‑proof bag – 1kg, 5kg, 25kg options
- ✔️ SDS & safety instructions included – handle with confidence
⚠️ WARNING: Causes severe burns. Read safety data sheet before use.
What is Sodium Hydroxide (Caustic Soda Flakes)?
Sodium Hydroxide (Caustic Soda Flakes) is a white, odorless, highly alkaline chemical compound with the formula NaOH. It is available as free‑flowing flakes that dissolve readily in water, generating significant heat (exothermic reaction). Our product is manufactured to 99% minimum purity, making it suitable for industrial, laboratory, and artisanal applications.
Common names include caustic soda, lye, and sodium hydrate. It is a fundamental raw material in many industries: soap and detergent manufacturing, paper production, textile processing, water treatment, and biodiesel production. For small‑scale users, it is essential for cold‑process soap making and drain cleaning.
⚠️ This product is hazardous. It causes severe chemical burns to skin and eyes. Protective equipment (gloves, goggles, mask) is mandatory. Always add caustic soda to water – never the reverse – to avoid violent splashing.
Technical Specifications
| Chemical Name | Sodium Hydroxide (NaOH) |
| Form | White flakes (free‑flowing) |
| Purity | 99% minimum (typical 99.2% – 99.5%) |
| pH (1% solution) | 13 – 14 (strongly alkaline) |
| Solubility in water | 1110 g/L at 20°C (highly soluble) |
| Available sizes | 1kg, 5kg, 25kg sealed HDPE bags or pails |
| CAS Number | 1310‑73‑2 |
| UN Number (hazardous transport) | UN 1823 |
| Country of origin | USA / EU (subject to batch) |
Common Applications for Sodium Hydroxide Flakes
- Cold Process Soap Making: Reacts with fats and oils (saponification) to produce bar soap and glycerin.
- Drain & Pipe Cleaning: Dissolves grease, hair, and organic blockages when mixed with water.
- Biodiesel Production: Acts as a catalyst in transesterification of vegetable oils.
- pH Adjustment in Water Treatment: Raises pH of acidic water or industrial effluents.
- Food Processing (Food Grade): Used for peeling fruits and vegetables, and as a curing agent (only food grade – this is industrial grade, not for direct food use unless specified).
- Laboratory Reagent: Titration, chemical synthesis, and analytical chemistry.
How to Use for Soap Making (Cold Process)
⚠️ Important: This is a hazardous chemical. Follow safety precautions exactly.
- Calculate lye amount: Use an online soap calculator (e.g., SoapCalc) to determine the exact weight of Sodium Hydroxide (Caustic Soda Flakes) needed for your oils.
- Prepare lye solution: Weigh the required flakes. Measure distilled water (typically 1 part NaOH to 2‑2.5 parts water). Always add flakes to water, never water to flakes to prevent violent eruption.
- Stir gently: The solution will heat up to near boiling (80‑90°C). Allow to cool to 35‑45°C before mixing with oils.
- Mix with oils: Combine lye solution with melted oils/fats. Blend with a stick blender until trace (emulsified).
- Pour into mold: Add fragrances, colors, exfoliants as desired. Pour into soap mold.
- Cure: Insulate for 24‑48 hours, then cut and cure for 4‑6 weeks.
Safety gear required: Rubber gloves, safety goggles, long sleeves, and a well‑ventilated area. Keep vinegar nearby to neutralize spills.
Critical Safety Information – Read Before Use
⚠️ DANGER – Causes severe burns and eye damage.
- Always wear chemical‑resistant gloves, safety goggles, and protective clothing.
- Work in a well‑ventilated area. Avoid inhaling dust.
- Never add water to caustic soda – always add caustic soda to water slowly.
- Dissolve in a heat‑resistant container (glass or stainless steel – not aluminum).
- In case of skin contact: Remove contaminated clothing. Rinse skin with plenty of water for 15 minutes. Seek medical attention.
- In case of eye contact: Rinse cautiously with water for at least 20 minutes. Remove contact lenses if present. Seek immediate medical help.
- If swallowed: Do NOT induce vomiting. Rinse mouth. Drink a glass of water. Call poison control immediately.
- Keep out of reach of children and pets.
- Store in original sealed container away from acids, moisture, and incompatible materials.
First aid kit suggestion: Keep a bottle of white vinegar or boric acid solution nearby to neutralize small spills on skin before rinsing.
Frequently Asked Questions
Is this sodium hydroxide food grade?
No. This is industrial grade 99% purity. For food processing applications (e.g., pretzel making, olive curing), please purchase food grade sodium hydroxide. Our product is not certified for direct food contact.
Can I use these flakes for drain cleaning?
Yes. Sprinkle 100‑200g of Sodium Hydroxide Caustic Soda Flakes into the drain, then slowly pour 1‑2 cups of warm water. Wait 15‑30 minutes, then flush with hot water. The reaction dissolves grease and hair. Never use in toilets or with aluminum pipes.
How much caustic soda do I need for soap making?
The amount depends on the oils used. Always use a soap calculator. As a rough guide: for 500g of olive oil, you need about 67g of NaOH. But different oils require different amounts. Never guess – use a calculator.
How should I store the flakes after opening?
Store in a tightly sealed HDPE plastic container (not glass for long term). Keep in a cool, dry place away from humidity, acids, and children. Opened product remains effective for 12‑24 months if kept dry.
Does this product expire?
Sodium hydroxide absorbs moisture and carbon dioxide from air over time, forming sodium carbonate (washing soda). This reduces its effectiveness for saponification. Unopened bags last 2‑3 years. Once opened, use within 12‑18 months.
Storage & Disposal Guidelines
Storage: Keep in original container with child‑resistant closure. Store away from incompatible materials: acids, organic peroxides, metals (aluminum, zinc, tin), and moisture. Ideal storage temperature: 10‑25°C (50‑77°F).
Disposal: Do not pour down drains or into waterways unless neutralized. To neutralize: slowly add caustic soda to a large volume of water, then add dilute hydrochloric acid or vinegar until pH reaches 6‑8. Confirm neutralization with pH paper. Dispose of neutralized solution according to local regulations. For small quantities, contact your local hazardous waste facility.
For more chemical safety resources, read our complete chemical handling guide and our SDS library. (Internal links)
If you’re making soap, pair your Sodium Hydroxide (Caustic Soda Flakes) with our virgin coconut oil and sustainable palm oil. For drain cleaning, consider our professional drain auger. (Internal links)
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