Cool tone developer used a proprietary anti-fogging agent which Ilford don't want to divulge, this is probably why they won't publish the formula now it's discontinued.

Ilford's current commercial print developers may well substitute Potassium Carbonate and Sodium or Potassium Hydroxide for the Sodium Carbonate, this allows greater solubility and concentration and reduces costs slightly. (Ilford Patents indicate this).

Ian