D-23 and D-25 were published at the same time, in fact Kodatol was Kodak's alternative to PDD super fine grain developers, they were all part of the same research project which included an early version of Microdol. Kodak chose to sell Kodatol DK-20 and then switched to Microdol and finally Microdol-X. There were issues with dichroic fog with Kodak films and D-25 and DK-20 and later Microdol. This got worse when Kodak improved their films in the 60's.
Originally Posted by Gerald C Koch