Guaifenesin.

[whatsbugginu]

[ning]

but guafenesin (whose true name is Guaiacol Glyceryl ether) has no amino group in it. So in an acid-base extraction, it will not come through.

[auntyjack]

what in tarnation is bc powder?

[SorceresS]

can get guanifesin out with toulene and mineral spirits if ephedrine or pseudo are the only other ingredients.

[UncleFester]

Your friends are dopes. Separating guifenesin from ephedrine is easy, and it has been a standard recipe in my books for years. It (guifensesin) doesn't dissolve in naptha, camper fuel, or other hydrocarbons. Now I must go to let the heat get back to normal again, and begin work on my next book.