Douglas Caustic Soda 500G


Code 5014651920056
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Product Information
  • Caustic Soda 500G
  • The inorganic chemical at a minimum of 99% pure
  •  Soluble in water, ethanol, and methanol
  • Used to make lake pigments and emulsions and soaps with wax and resin
  • Can be substituted with potassium hydroxide
  • Acts as a built-in detergent, removing dirt and other deposits
Delivery Info

We are pleased to offer FREE delivery on orders over €149.00 to anywhere in the Republic of Ireland and Northern Ireland, and our Click & Collect service is FREE on all orders. All items are shipped from the Athlone Warehouse in Co. Westmeath, Ireland so no import duties apply to the island of Ireland.

Delivery Costs to Republic of Ireland are €6.99 for orders Under €149.00

We are now delivering to Northern Ireland with all delivery costs equal to the Republic of Ireland.

Large Bulky Items

Please be aware that large, bulky items (large appliances, white goods, etc.) have a delivery charge of €29.99 to ROI

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Returns Policy

Due to our valued customer feedback, we have updated and improved our Returns Policy.

We now offer an exhange or refund on goods purchased online, and returned 14 days after purchase. 

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Caustic Soda 500G

Caustic soda is an essential household chemical that can be used, like many acids, as a cleaner for various things. Perfect use as a rust remover, a cleaning agent, on woodwork as a stain lifter, as a bleaching agent, and many more.  The Caustic Soda is then mixed with water to turn into a solution of Oxalic acid. Moderate doses are safe for various useful functions.


  • Breaks down to oxygen, water and sodium carbonate (soda ash) in your wash water
  • Colour safe and fabric safe
  • Effective stain removal on a multitude of surfaces
  • Prevents fabrics from becoming yellowed or darkened


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