Photographers' Formulary P-Aminophenol - 10 Grams Tweet Description P-Aminophenol Developing Agent is used as a developing agent, usually with hydroquinone, but sometimes by itself as in Kodak D-23. Details Additional Category Tags: Chemistry, Alternative Process & Miscellaneous Chemistry Category: Photography Manufacturer Catalog Number: 10-0050 10G Product Manufacturer: Photographers' Formulary Subcategory: Darkroom Equipment