[solved]How to dissolve GENETICIN/G418 and what does it mean by 707ug/mg

707 ug/mg means the purity
5mg * 707ug/mg = 3.535 g pure geneticin = 3535 mg pure geneticin = 70.7 ml * 50mg/ml

In other words, add 70.7 ml H2O
and don't forget to filter it.

reference:
http://openwetware.org/wiki/McClean:_Geneticin/G418_Stock_Solution