# Linear PEI Solution Making

I'm making a solution with linear poly(ethyleneimine) $$\ce{[CH2CH2NH]_{n}}$$. The bottle indicates that the substance is hygroscopic and must be dealt with under inert gas. Is this really necessary? I don't currently have access to such a space - just the PEI and a balance.

• Well, depends if water in your solution makes problem. May 26 '15 at 11:07