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Diphenylamine has a wide variety of industrial functions, both as product additive and synthetic building block. As a test reagent, it used as a redox indicator or, most commonly, in the diphenylamine test for nitrates. In this test, reaction with nitrates gives a visible blue product which can be quantified by spectrophotometry.

Additional information

CAS Number


E0 [mV]


Colour (ox – red)

violet – colourless

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Osorno Enterprises Inc.
976 Elgin Avenue
Winnipeg MB R3E 1B4
+1 204 488-1538 (Phone)
+1 204 488-1566 (Fax)
Regular Hours of Operation
We are closed on December 24 - 28, 2020 and
December 31, 2020 - January 4, 2021
Monday - Friday: 9:00 - 17:00
Saturday - Sunday: Closed

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