ozone-scavenging reagent Synonym(s): 5,5',7-Indigotrisulfonic acid tripotassium salt; Indigo-5,5',7-trisulfonic acid tripotassium salt; Potassium indigotrisulfonate; Tripotassium indigo-5,5',7-trisulfonate; tri-Potassium indigo-5,5',7-trisulfonate Empirical Formula:...