It is sold as washing soda, soda crystals, or sal soda.

Seventy-two irreparable devices were neutralised on-site by being drained into individual pits filled with caustic soda crystals.

Wearing gloves ; fill a plastic bottle with one litre of warm water, and using a plastic spoon, pour a dessertspoonful (two teaspoons) of Caustic Soda crystals into the water.

The factory was built in 1893 on the south side (River Thames side) of North Woolwich Road (now the A1020, nearly opposite Mill Road) by Brunner Mond, a forerunner of Imperial Chemical Industries, to produce soda crystals and caustic soda.