Sugar soap

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Sugar soap is an industrial cleaning material, with a variable composition and supplied in either powdered or liquid form. The powdered form looks like granulated white sugar, which explains the first half of the name, although sugar soap contains neither sugar nor soap. It is a mixture of basic salts, such as sodium carbonate and sodium phosphate, dissolved in water to form an alkaline solution. It sometimes contains an abrasive such as sodium silicate.

Sugar soap is commonly used for cleaning paintwork in preparation for repainting.

The term appears to be used mainly in Commonwealth countries. In the United States, it refers to a cosmetic product.

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