... soluble in water, and meanwhile will give off a lot of heat, and the water solution has a soapy feeling. ... rayon and soap manufacturing. What’s more, in the production of dyes, plastics, medicine, organic intermediate, old rubber regeneration, and ... din the production of inorganic salt, and also in the making of sodium borate, chromium salt, manganate, phosphate need large quantity of caustic soda too ...