Struggles crystallisation

[AlbertEinstein777]

Hello,

I have struggles with the crystallisation of a-pvp, I follow all the steps of the thread on this size 70/30 solution of alcohol and water with 1ml proportion to 1g of a-pvp, but when i get it out of the freezer and put it under a ir light it just keeps getting liquid again. Tips?

 

[YenaneY]

Just put it on an evaporation dish, it is very unlikely the APVP is gone, if you want retry with even less, or with less alcohol proportionally to water, otherwise jut wash with chilled acetone for purification.