Taken from post Ephedrine Sulfate vs. Ephedrine HCLWell since no one on here could give a solid answer I did some research and came up with this.....
Ephedrine HCl is approximately 82% ephedrine by weight.
Ephedrine sulfate is approximately 77% ephedrine by weight.
25 mg ephedrine HCl = 20.5 mg ephedrine
25 mg ephedrine sulfate = 19.25 mg ephedrin
That helps a little bit, would still like to hear from others though