DABEERSEN products are used in photography to avoid the formation of turbidities and foams in the development bath and the oxidation of the developing liquid caused by heavy metals. The DABEERSEN NaFe and FeN iron salts are employed in hardening-fixing baths to oxide the silver and to remove it from the photographic film. The DABEERSEN chelates prevent the precipitation of metallic compounds and increase the iron reactivity versus the silver.