About this product
Caustic soda — sodium hydroxide (NaOH), CAS 1310-73-2 — is a strong alkali we stock in solid flake and pearl form, sourced from Grasim Industries (Aditya Birla Group) to IS 252:2013 technical grade. Buyers use it wherever strong alkalinity is needed: soap and detergent manufacturing, textile processing, water treatment, and chemical synthesis. We hold stock in 50 kg HDPE bags at our Redhills, Chennai warehouse and dispatch across South India.
Applications & Uses
Safety & Technical Documents
MSDS / SDS
TDS / COA
Certificate of Analysis · with every supply, on request
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Product DataTechnical Specifications
Physical Properties
- Appearance
- White flakes / pearls / solid, hygroscopic
- Purity
- ≥ 98% NaOH (flake/pearl)
- Assay
- 98% min NaOH
- Density
- 2.13 g/cm³ (solid at 20°C)
- Boiling Point
- 1388°C
- Melting Point
- 318°C
- pH
- > 13 (1% aqueous solution)
- Solubility
- Highly soluble in water (exothermic); soluble in ethanol, glycerine
Supply & Packaging
- Packaging
- 25 kg HDPE bag50 kg HDPE bag1000 kg jumbo bag
- Grades Available
- Industrial flakesPearls / prillsRayon grade
- Lead Time
- Ex-stock to 3 working days
- Origin
- Domestic
Compliance & Storage
- HS Code
- 2815.11.00
- UN Number
- 1823
- Hazard Class
- Class 8 — Corrosive solid (Packing Group II)
- Storage
- Cool, dry place. Keep tightly closed — strongly hygroscopic and absorbs CO₂. Avoid contact with aluminium, zinc, tin.
- Shelf Life
- 24 months from manufacture (unopened, dry storage)
These specs are indicative. Request a Certificate of Analysis (COA) for batch-specific values.
Source Manufacturers
Sourced directly from verified manufacturers for consistent quality and traceability.
Supplied across South IndiaCoimbatoreMaduraiHosurBangaloreHyderabadVisakhapatnamKochi
Frequently Asked Questions
What is the CAS number of caustic soda?
The CAS number of caustic soda is 1310-73-2, and its HSN code is 2815 11 00. It is the solid flake and pearl form of sodium hydroxide (NaOH).
Is caustic soda the same as sodium hydroxide?
Yes. Caustic soda is the common trade name for sodium hydroxide (NaOH), also known as lye. We supply it as solid flakes and pearls under CAS 1310-73-2.
What is the difference between caustic soda flakes and caustic soda lye?
Both are sodium hydroxide, CAS 1310-73-2. Flakes and pearls are the dry solid form covered on this page — buyers store them dry and dissolve on site as needed; dissolving in water is strongly exothermic. Caustic soda lye is the liquid solution form, which we list as a separate product.
What specification do your caustic soda flakes meet?
Our flakes are technical grade to IS 252:2013 — white flakes free from foreign matter, NaOH 97.0% min (99.5% min on dry basis), sodium carbonate 0.40% max, and iron 20.0 ppm max. Material is sourced from Grasim Industries Limited (Aditya Birla Group), and the specification is cross-checked against the supplier COA. Industrial flakes, pearls/prills, and rayon grade are available.
How should caustic soda flakes be stored safely?
Keep them in a cool, dry place, tightly closed — the flakes are strongly hygroscopic and absorb CO2 from air. Never add water to the product, and avoid contact with aluminium, zinc, and tin. Caustic soda is a Class 8 corrosive solid (UN 1823) with a 24-month shelf life unopened in dry storage.
Where can I buy caustic soda flakes in Chennai?
We stock caustic soda flakes at our Redhills, Chennai warehouse and dispatch across South India, typically packed in 50 kg HDPE bags. Order sizes depend on packaging and current stock. Call or WhatsApp +91 86087 80096 for a quote.
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Product Details
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