MK-801 ph

[Richard M. Hinchliffe]

MK-801 is soluble to 6.0 mg/ml in water.  does anyone know what the ph of
such a solution is or where a reference regarding this might be found?
Any tips for buffering such a solution?  Artificial CSF does not seem to
do the job.

Thank you in advance for any help.
Richard M. Hinchliffe