It was reported that glycin does not dissolve in propylene glycol (to make long lasting 2-part developers) but only in TEA. However I made this experiment: 2g glycin, 6ml TEA, 1tsp water,on heating gently and stirring this formed a clear solution which dissolved in 14 ml propylene glycol.The solution is only a few days old so it is not known if it is stable.
Heating these organic solutions cannot be made completely risk free IMO.