Quote Originally Posted by esox View Post
Hello,

What is CD3 component ?

Thanks
It's the colour developing agent.

4-Amino-N-ethyl-N-(-methanesulphonamidoethyl-m-toluidine sesquisulphate monohydrate =
Mydochrome (May & Baker); Activol No 3 (Johnson), Colour Developer 3 (Merck); CD-3 (Kodak).

The chemical name can be written various ways.

Ian