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Caustic soda

Caustic soda, also known as sodium hydroxide, is a highly caustic and versatile chemical used in various industrial processes, including the production of soap, paper, and detergents. This white, solid substance is highly corrosive and can cause severe burns. Proper safety measures must be observed to avoid harm.

Caustic Soda – What It Is and Why It Matters

Caustic soda, or sodium hydroxide (NaOH), is a strong, versatile chemical. It’s used in a wide range of industries across Australia — from water treatment and cleaning to food processing and manufacturing.

It comes in both solid (flakes, beads, granules) and liquid forms. It mixes easily with water and reacts fast, which makes it useful for many jobs like adjusting pH levels, making soap, or refining aluminium.

What Is Caustic Soda?

Caustic soda is made by running electricity through saltwater. The result is a white, odourless solid with a very high pH. When mixed with water, it gives off heat and dissolves quickly.

It’s good at breaking down grease, fats, and proteins. That’s why it’s used in cleaning products, industrial processes, and water treatment.

Where It’s Used

Industries across Australia use caustic soda every day. Here are some examples:

  • Water Treatment – Helps control pH and neutralise acids.

  • Aluminium Production – Used in the Bayer process to extract alumina from bauxite.

  • Soap and Detergents – Needed to turn fats and oils into soap.

  • Paper and Pulp – Removes lignin and helps control acidity.

  • Food Industry – Used for peeling fruits and vegetables, making cocoa, and pretzels.

It’s also common in strong degreasers and industrial cleaners because it dissolves organic material so well.

Buying from Us

We supply caustic soda across Australia in both solid and liquid forms. You can order in bulk or request custom packaging based on what you need. Delivery is fast and reliable.
Request a quote here.

Safety Comes First

Caustic soda is corrosive. Always wear gloves, eye protection, and protective clothing when handling it. Store it in a cool, dry place with good airflow. Keep it away from acids and moisture.

For full safety details, request the SDS here.

Basic Info:

  • CAS: 1310-73-2

  • Form: White solid (flakes or pellets)

  • Smell: Odourless

  • Solubility: Very soluble in water

  • pH (1% solution): Above 13

  • Density: About 2.13 g/cm³

  • Melting Point: 318°C

Avoid breathing in dust or mist. Work in a well-ventilated area or use a respirator if needed. Don’t let it touch your skin or eyes — it can cause burns.

Order Caustic Soda in Australia

We offer pickup and delivery across the country. Packaging is flexible and can be customised.
Contact us today to learn more or place an order.