erythromycin storage - erythromycin storage (Dec/15/2004 )

Hi everyone!
What temperature should I use to store erythromycin powdered and erytromycin in stock? I purchased it from Sigma. In catalog they say to store stock between 2-8 degrees, some people use -20*.
But what about fresh powdered antibiotic?
I used to keep it in 4 degrees. I don't know maybe it is harmful temperature.
Regards
Tomgar

HI.-

I use to store erythromycin powdered 4ºC, and the stock to -20ºC.



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