I never did say what the original formula was. It was in my article on The Role of Antifreeze in Photographic Science in Mar/Apr Photo Techniques. That recipe called for 10 grams of hydroquinone and 0.25 grams of phenidone dissolved in propylene glycol to make 100 ml. It is necessary to heat the mixture condiserably to get it to dissolve. Once dissolved it does not precipitate. There is no sulfite, bisulfite or bromide in it. It is used with the same B solution as Pyrocat-HD, to which bromide may be added if fogging is a problem. This is not, IIRC, the same formula that Tom Hoskinson posted. The glycol served the function of preservative without contributing any activity, and in fact inhibiting activity until water is added. This allows experimenting with sulfite free developers of many kinds. If sulfite is desired, it is easily added to the B solution.