Product
Caustic Soda
Caustic Soda (sodium hydroxide) is the most widely used strong alkali, supplied as flakes, pearls and 48% lye for alumina refining, detergents, textiles, mining and pH control.
- Grades / forms
- Flakes, pearls & lye · Flakes, pearls, lye · Flakes, pearls, 48% lye
- Documents
- TDS · SDS to view and download
Overview
Caustic soda, NaOH, is produced by electrolysis of brine. Modern membrane-cell plants give a high-purity product with very low chloride and iron, which matters in pharmaceuticals, food processing and rayon. It is sold as solid flakes, as small free-flowing pearls (prills), or as a 48–50% solution (lye) for buyers with bulk storage.
Its uses are enormous: digesting bauxite in alumina refineries, saponifying fats into soap, mercerising and scouring cotton, pulping wood, neutralising acids in effluent, adjusting pH in flotation and making a long list of sodium chemicals. It is highly corrosive and generates a great deal of heat on dissolving, so handling procedures matter as much as purity.
Applications
- 1Alumina refining (Bayer process) and mineral processing
- 2Soap, detergent and LABSA neutralisation
- 3Textile mercerising, scouring and dyeing
- 4Pulp and paper manufacture
- 5pH correction in water and effluent treatment
- 6Chemical synthesis and biodiesel catalyst
Specification
- Sodium Hydroxide (as NaOH), Dry basis (%)
- 99.50 min
- Sodium Carbonate (as Na₂CO₃) (%)
- 0.40 max
- Chloride (as Cl) (%)
- 0.03 max
- Iron (as Fe³⁺) (ppm)
- 20.00 max
Specification as stated on our Technical Data Sheet, which you can download below.
Documents
PDF documents from our quality records.
Packing & storage
Packing
- 25 kg PP bags with PE liner
- 1000 kg jumbo bags
- Lye in IBCs
Storage & handling
Keep sealed — caustic soda absorbs moisture and carbon dioxide from air. Store away from acids, aluminium and zinc. Classified as corrosive: UN 1823 (solid) or UN 1824 (solution), Class 8.
Enquire
Get a price for Caustic Soda
Send grade, quantity and destination port. Price, lead time and documents come back within one business day.
Request a quotation or call +91 97979 77958- Certificate of Analysis with every batch
- SDS in destination format
- Made to your specification
- Private label packing
Questions
Caustic Soda, answered.
Flakes and pearls carry 98% or more NaOH, so they are the most economical form to ship long distances. Pearls flow freely and suit automatic dosing. Lye (48–50% solution) avoids dissolving and the heat that comes with it, but needs bulk tanks and ships half water.
Yes. Solid caustic soda ships as UN 1823 and solution as UN 1824, both Class 8 (corrosive), Packing Group II. UN-approved packaging, labels and the IMDG declaration are prepared for every shipment.
Always add caustic soda slowly to water, never water to caustic soda, with stirring. Dissolving releases a lot of heat and can boil and spatter. Face shield, chemical goggles and alkali-resistant gloves are essential.
Yes. Cosmo Chemistry manufactures and exports Caustic Soda from Surat, Gujarat, India to more than 55 countries, for customers in the water treatment, mining & oil drilling and basic industrial chemicals industries. Send your grade, quantity and destination port for a quotation within one business day.
Every shipment of Caustic Soda from Cosmo Chemistry includes a batch-specific Certificate of Analysis (COA) and Safety Data Sheet (SDS). Certificate of Origin, third-party pre-shipment inspection and destination-specific regulatory documentation are arranged on request.
Further reading
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