Caustic Soda Pearl (General Use)

28th October 2018

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An image showing Caustic Soda Pearl (General Use) in a 25kg bag

Buy Caustic Soda Pearl from ReAgent

We supply Caustic soda in pearls for general use in 1kg containers and 25 kg bags. This product is characterised by a 96% minimum purity and maximum impurity levels of 2% carbonate, 0.01% chloride and 0.1% sulphate.

Full Sales Product Specification available to download from the website. We also offer further options with all our products, such as customised labelling or specific pack sizes. Contact us for further details.

Current Method of Industrial Synthesis

Nowadays, caustic soda – also known as sodium hydroxide (NaOH) – is traditionally synthesised via the chloralkali process (electrolytic reaction). Pure sodium hydroxide is obtained after removal of by-product chlorine gas. Following a final evaporation step, caustic soda is sold in flakes, pearls or powder.

The chloralkali method is used by most large companies, but other reactions have been used in the past. The first large-scale method to produce caustic soda involved a reaction between insoluble sodium carbonate (Na2CO3) and soluble calcium hydroxide (Ca(OH)2). This procedure was known as causticizing. In chemical terms, this type of reaction is called a metathesis reaction, involving a double replacement.

Ca(OH)2(aq) Na2CO3(s) → CaCO3↓ 2NaOH(aq)

Caustic soda can be produced by many other methods, most of which not commercially viable and only used in an academic setting to demonstrate certain properties to students. One example is the reaction with sodium metal and water, producing caustic soda and hydrogen gas, which is used to show how reactive alkali metals are.

Important Safety Information



Caustic Soda causes severe skin burns and eye damage so please take great care when handling it. We recommend wearing appropriate personal protective equipment including gloves, safety glasses and overalls when handling this product, even if still sealed in its original packaging.

Please refer to the MSDS for detailed safety and precautionary information before handling Caustic Soda.

Over 40 years’ Experience

Established over 40 years ago, ReAgent has built an enviable reputation for high-quality products and excellent customer services. We have a wide range of caustic soda products, including different concentrations and grades, to suit all your needs. Please contact us for a quote or technical question.

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