Caustic Soda 50% Liquid Solution

Caustic soda 50% liquid (sodium hydroxide) in 5 L and 20 L

Viva Blu caustic soda is sodium hydroxide (NaOH) supplied as a ready-to-use 50% liquid solution. Liquid caustic soda goes straight into your dosing pump, CIP tank or dilution vessel, with no dissolving step, no caustic dust and a consistent strength every time. It is used by water treatment operators, food and beverage plants, cleaning contractors, plumbers, councils and manufacturers.

What is caustic soda 50% used for?

• Water and wastewater treatment: pH correction, neutralising acidic effluent and precipitating metals.
• Food and beverage cleaning: clean-in-place (CIP) systems, bottle and keg washing, and removal of fats and proteins from process equipment.
• Cleaning and degreasing: heavy-duty removal of fats, oils, grease and organic deposits.
• Drains and grease traps: clearing fat, hair and organic blockages in commercial drainage.
• Manufacturing: soap making, chemical processing, textiles and metal surface preparation.
• Agriculture: cleaning irrigation systems, tanks and equipment.
• Pools and large water bodies: pH increase, used with care because it is much stronger than standard pH increasers.

For a deeper look at each industry, read our guide to caustic soda uses in industry. Comparing alkalis? See caustic soda vs soda ash.

Why 50% liquid instead of flakes?

• Ready to dose: no mixing, which avoids the heat and splashing of dissolving solid caustic.
• No dust: flakes and pearls can release caustic dust that harms eyes and lungs.
• Consistent strength: important for process control and repeatable cleaning.
• Pump-friendly: works with standard chemical metering pumps and CIP systems.

Pack sizes

• 5 L container: for small trade jobs, workshops and trials.
• 20 L drum: for commercial cleaning, CIP and water treatment.

Trade and business supply

• Business buyers: register for a Viva Blu B2B account.
• Regular or larger volumes: for regular or larger volumes of caustic soda 50%, call 0402 981 808 or email contact@vivablu.com.au.
• Documentation: SDS available on request: call 0402 981 808 or email contact@vivablu.com.au.
• Local stock: dispatched from our Brisbane warehouse in Windsor, QLD, with free pickup available.

Product details

Safety, handling and storage

Caustic soda 50% is highly corrosive and causes severe burns to skin and eyes. Read the Safety Data Sheet (SDS) before use; SDS available on request: call 0402 981 808 or email contact@vivablu.com.au.

• Wear chemical goggles and a face shield, nitrile or neoprene gloves, a chemical-resistant apron and enclosed footwear.
• When diluting, add caustic slowly to cold water, never water to caustic.
• Never mix with acids, and keep away from aluminium, zinc and galvanised metal.
• Store sealed in the original container, in a cool, ventilated area, on a chemical bund and away from acids.
• For skin or eye contact, flush with water for at least 15 minutes and get medical help. Poisons Information Centre: 13 11 26.

Delivery and pickup

Caustic soda is a dangerous good and ships with dangerous goods freight, within Australia only. The exact cost is calculated at checkout before you pay. Orders are handled within up to 2 business days. Delivery usually takes 1 to 3 business days in Queensland and up to 7 business days elsewhere after dispatch, and dangerous goods can take a little longer. You can also collect free from our Windsor, QLD warehouse. See our shipping policy.

Frequently asked questions

Where can I buy caustic soda in Australia?

Viva Blu sells caustic soda 50% liquid online in 5 L and 20 L containers, delivered within Australia with dangerous goods freight, or free pickup from our Windsor, QLD warehouse.

Is caustic soda the same as sodium hydroxide?

Yes. Caustic soda, sodium hydroxide, NaOH and lye are the same chemical. This product is a 50% solution in water.

Can I use caustic soda to unblock drains?

Yes, caustic soda dissolves fat, hair and organic blockages. Wear gloves and eye protection, add it slowly, and never mix it with acids or other drain products.

Can caustic soda raise pool pH?

It can, but it is much stronger than standard pH increasers and easy to overdose. For most home pools, soda ash or bi-carb soda is simpler and safer.

Is this caustic soda food grade?

It is sold for industrial and commercial use. For direct food applications, use a product certified as food grade.