2,4-Dichlorobenzenediazonium 1,5-naphthalenedisulfonate hydrate CAS 123333-91-5 is used a intermediates. 1,5-Naphthalenedisulfonic acid salt hydrate is a coordination compound commonly used as a reagent or intermediate in organic synthesis. It can be employed in the synthesis of pharmaceuticals, dyes, polymers, and other organic compounds. In the laboratory, it can also serve as a catalyst or precursor to catalysts in organic synthesis reactions.