4-(N-Ethyl-N-2-hydroxyethyl)-2-methylphenylenediamine sulfate CAS NO.25646-77-9

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Purpose:
The fourth in the series of color developing agents used to develop color films, commonly called CD-4, is chemically known as 4-(n-ethyl-n-hydroxyethyl) -2-methylphenylenediamine sulfate. In the process of color development, the silver atoms in the silver halide crystal are reduced by the oxidizing color development agent, which combines with the color coupling to form color dye molecules.
Purpose:
Used as a high temperature rapid developer for oil soluble color film in motion picture and photographic departments