If there are no expiration dates on the chemical: For chemicals distributed by Fisher, look at the Lot #. The first 2 numbers are the year it was manufactured. In general, chemicals are considered expired 3-5 years after the year they were manufactured.
You can also check the certificate that comes when the chemical is delivered. It should have an expiration date or at least a year of manufacture. Sandy Harrison -----Original Message----- From: histonet-boun...@lists.utsouthwestern.edu [mailto:histonet-boun...@lists.utsouthwestern.edu] On Behalf Of Amy Johnson Sent: Thursday, January 21, 2010 1:47 PM To: histonet@lists.utsouthwestern.edu Subject: [Histonet] Chemical outdates Hello Histonetters, We just got inspected by CAP and it was recommended that we put expiration dates on our chemicals once we open them. What kind of time frame do any of you other labs do in regards to this? Thanks for your input, Amylin Johnson _______________________________________________ Histonet mailing list Histonet@lists.utsouthwestern.edu http://lists.utsouthwestern.edu/mailman/listinfo/histonet _______________________________________________ Histonet mailing list Histonet@lists.utsouthwestern.edu http://lists.utsouthwestern.edu/mailman/listinfo/histonet