None of them are particularly toxic, at least on the order of

Thank you for your answer.

Are these concentrations valid for slice preparation or neuronal culture (dissociated primary neurons)?

Thanks a lot.

The concentrations ARE the concentrations you use in slices/culture.

doi:10.1152/jn.00335.2013 111:2404-2413, 2014. First published 12 February 2014; J Neurophysiol Ulises M. Ricoy and Matthew E. Frerking synaptic dynamics 2.3 in activity-dependent − 2.1 v Distinct roles for Ca You might find this additional info useful