Dear All, will someone please provide me information on the shelf life of 
4%PFA/PBS?  I have a few liters of this unused fixative left over from 
various experiments.  And I'm wondering if it can be used for routine 
fixation or if I should just treat it for waste disposal?  A couple of 
years ago I heard by word of mouth that after a certain period of time the 
PFA reverts back to  regular formaldehyde.  Does anyone have a reference 
you can recommend whereby I can get my questions answered?  On the other 
hand if you know for a fact that it can be used as  either formaldehyde or 
10% formalin please will you share this info with me?  If it can be used 
does it need to be stored at 4C?  Thanks, Atoska






Atoska S. Gentry B.S., HT(ASCP)
Research Assistant III
Scott-Ritchey Research Center
College of Veterinary Medicine
Auburn University, AL  36849
Phone# (334)844-5579  Fax# (334)844-5850