There's no debate on the three main constituent parts in Microdol-X or Perceptol but we don't know the trace additives for sure. They are known to be based on D23 with Sodium chloride, as the MSDS sheets clearly used to show Metol, Sulphite & Sodium Chloride - mistakenly listed a Bromide for a while on the Perceptol sheet.

D23 with 25g Sodium Chloride behaves like Perceptol.