What is the general  rule for the refrigerator life of 4% paraformaldehyde?  Also, for IHC purposes on cells, are there preferences for the preparation? i.e. heat versus pH?

thanks!

Sylene MJ Goodwin, B.S. HTL(ASCP)
Dept. of Gasteroenterology
University of Colorado Health Sciences Center
4200 E. 9th Ave
BRB 742/Campus Box B-158
Denver, CO 80262

(303)315-3520
FAX (303)315-3507