Diathyl-P-Phenylendiaminum Sulfuricum

[ongarine]

A firiend gave me an ancient container in amber glass with almost 70 grams of this product expecialy made for photo purpose, said the label.
It is for sure old and it is in a pale grey powder form.
I haven't found nothing about this ancient reducing agent.
Someone of the APUG chemists have suggestions how to use it?
Assuming it is still active

 

[eclarke]

Hi,
Sciencelab.com is a fairly nice place to research chemicals. They indicate this is one of the many synonyms for paraphenylenediamine which is used in a number of developer formulas, I use it in Germain finrgrain. The thing is that in this situation using old chemicals may be like serving old fish...EC

 

[Ole]

It's a colour developer, trade name Genochrome.

That's all I know.

 

[Gerald Koch]

I believe that this chemical is the earliest color developing agent. It is also the worst one when it comes to image stability. Of all the color developing agents it is also causes the most skin reaction, being almost as bad as p-phenylenediamine. It can be used as a substitute for p-phenylenediamine in fine grain developers.

 

[htmlguru4242]

If it's genochrome, then it's CD-1; i believe that somebody here was looking for some of that a few weeks ago ...

 

[Photo Engineer]

It is probably no good. It does not have a great shelf life.

PE

 

[ongarine]

Thanks all, I found some formulas to use the paraphenylenediamine sulfate, first Germain fine grain developer, if someone has some others suggestion or experience with this kind of developers (fine grain with lost of speed) please let me know, thank.
A simple question: which is the realiable and simple method to test the activity, without mixing a developer, of paraphenylenediamine sulfate?