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erythromycin stock prepn

Tue Aug 10 19:53:31 EST 1993

> From:	IN%"<@CGNET.COM:NetID at cornell.edu>"  "NetID"    10-AUG-1993 11:28
> Bioslaves,
> Any ideas on how to make up an erythromycin stock solution i.e. dissolve
> in ethanol, base, acid, etc.  Pls. post reference if you have one.
> Ola Sodeinde

The Sigma 1993 Catalog has a useful tabulation of technical information
on antibiotics they are marketting. 

Now with respect to your inquiry: eythromycin is soluble in either 2 M HCl or
absolute ethanol. Recommended stock concentration is 100 mg per liter. The
Sigma table didn't specify whether the acid or the alcohol solution should
be used but I suppose the latter will be better. Furthermore, shelve your 
tocks at subzero temperature. At 37 degrees C, the stability  of an 
erythromycin stock is limited to 3 days.

Good day! :-)

Plant Pathology Division
International Rice Research Institute
Manila, Philippines
e-mail: rscott at irri.cgnet.com

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