Your producer and distributor of reference materials

Terephthalidene dicamphor sulfonic acid, [(3Z)-3-[[4-[(Z)-[7,7-Dimethyl-2-oxo-1-(sulfomethyl)-3bicyclo[2.2.1]heptanylidene]methyl]phenyl] methylidene]-7,7-dimethyl-2-oxo-1-bicyclo[2.2.1]heptanyl]methanesulfonic acid