Diathyl-P-Phenylendiaminum Sulfuricum

ongarine · Oct 27, 2006

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 · Oct 27, 2006

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 · Oct 27, 2006

It's a colour developer, trade name Genochrome.

That's all I know.

Gerald Koch · Oct 27, 2006

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 · Oct 27, 2006

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 · Oct 27, 2006

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

PE

ongarine · Oct 28, 2006

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?

Diathyl-P-Phenylendiaminum Sulfuricum

ongarine

eclarke

Ole

Moderator

Gerald Koch

htmlguru4242

Photo Engineer

ongarine

Privacy & Transparency

Privacy & Transparency