The latest "dust off" type product that I bought does not identify the ingredients other then to say that it contains no HFC or CFC (both are broad indentifiers of refrigerants) and thus claims no ozone depletion capabilities. Beyond that I don't know what the product may contain. If it were to contain oxygen in any of it's forms or formulations it would seem to have the capability of entering into an oxidation of the developer.

I have found that with Pyrocat HD or ABC pyro that the mixtures I make up can be of fairly small quantities (if I so desire). This is my answer to this whole dilemna. I gain better tonal gradation and accutance as a primary result and the cost is lower then buying premixed developers. Since either of these developers are two and three part, respectively, the life of the stock solutions is greatly extended as well.