Caustic Soda Pearls Specification (also known as sodium hydroxide, caustic soda, NaOH, sodium hydrate, or Sodagrain) are white spheres of caustic soda with a barely perceptible odour. They are soluble in water, with the liberation of heat, and are stable under normal conditions. Caustic soda is a strong base and, as such, has many applications in industries all over the world, both now and in the past. It is one of the oldest manmade chemicals with excavations in Egypt showing samples of it dating from 3000 B.C. http://www.chinavgchem.com/