N, N-Dimethyl-p-phenylenediamine

Melting point - 53 ° C, boiling point - 262 ° C. Soluble in water, chloroform, soluble in alcohol and ether ^[1] .

It has the ability to form various classes of dyes in the process of color photographic manifestation. In particular, with derivatives of naphthol forms indophenol dyes ^[2] :

  + 4 AgBr +  ${\displaystyle <span\; class="mwe-math-element"><span\; class="mwe-math-mathml-inline\; mwe-math-mathml-a11y"\; style="display:\; none;">⟶</span></span>}$ {\ displaystyle {\ ce {->}}}     + 4 Ag + 4 HBr

Obtained by nitrosation of N, N-dimethylaniline and the subsequent reduction of N, N-dimethyl-4-nitrosoaniline with iron ^[1] .

Apply:

• in microscopy for the discovery of oxidases ^[1] ;
• in analytical chemistry - for the determination of ozone in air, hydrogen sulfide , chlorine , bromine , vanadium sulfides ^[1] ;
• in the production of dyes (sulfur and methylene blue ) ^[1] ;
• in the photo: the substance is a color developing substance ^{[2] [3]} ( CD-8 , Color Developing Agent 8 ) ^[4] , but has not been used in practice in this role.

The reagent is usually produced in the form of salts having better solubility and shelf life: sulfate (cas 536-47-0), hydrochloride (cas 536-46-9) and oxalate (cas 62778-12-5).

Causes an allergy ^[1] .

• Chemical Encyclopedic Dictionary / Ch. ed. Knunyants I.L. - M .: Sov. Encyclopedia, 1983.- 792 p.
• Hunt R.V. G. Color reproduction / trans. A.E. Shadrin. - 6th ed .. - St. Petersburg. , 2009 .-- 887 p.
• Eaton G. Photographic chemistry in black-and-white and color photograpy (neopr.) . - second edition. - NY: Morgan & Morgan, Inc., Publishers Hastings-on-Hudson, 1965.

• Nishijima T., Nishimura M. US Patent 5459014: Method for forming a photographic color image with a photographic material containing a hydroxy-phenyl derivative, using a chloride-containing color developer . Konica Corporation . Date of treatment May 21, 2017.