RE: Old paraformaldehyde
Kathy McKinnon (Kathy_Mckinnon@hgsi.com)
Thu, 09 Nov 95 15:14:07 EST
We use a 20% Ultrapure formaldehyde stock solution purchased from Tousimis
Research Corp. (301)-881-2450 (Catalog # 1008B $25.95). This is supplied in a
100 ml bottle, that we dilute with PBS to a 2% working solution. The stock
solution is stable at 4 C for many months, and the working solutions are stable
for at least a month. We have found that it is well worth the cost to purchase
the ultrapure solution and make dilutions instead of making up fresh
paraformaldehyde from the powder every month.
Good luck,
Kathy McKinnon
Cell Biology Department
Human Genome Sciences, Inc.
kathy_mckinnon@hgsi.com
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