We dissolved 1 mg/ml CNO in DMSO (2% of final volume). Our rats get daily injections (they are Brown Norway rats) and consistently develop lesions at the points of injection. Does anyone have any recommendations as to how this could be prevented?
FYI, Hello Bio manufacture a water soluble CNO (dihydrochloride salt) and a freebase version. Both have been extensively tested by us and we have written two comprehensive reviews on stability, storing, solubilising and handling of the water soluble DREADDs ligands and CNO freebase that you may find helpful - they contain new stability data too. The links are: