R Salt

R Salt or 2-Hydroxy-3,6-naphthalenedisulfonic acid is an organic compound that belongs to the class of naphthalene sulfonic acids. It is a white crystalline solid that is soluble in water. It is used as a intermediate in the production of dyes, pigments, and other chemicals. It can also be used as a chelating agent, a water softener, and a corrosion inhibitor.