Diphenylamine is employed as harvest scald inhibitor for apples indoor drench treatments due to its antioxidant property. Alkyl derivatives of diphenylamine are used as anti-ozonants in the rubber manufacturing. It is used as lubricants and acts as a stabilizer for plastics. In the analytical chemistry, it is used to test the nitrate ion in association with ammonium chloride in sulfuric acid.

This Thermo Scientific Chemicals brand product was originally part of the Alfa Aesar product portfolio. Some documentation and label information may refer to the legacy brand. The original Alfa Aesar product / item code or SKU reference has not changed as a part of the brand transition to Thermo Scientific Chemicals.