u/CostEfficient3675

As title mentions, I don’t have access to dry ice. I do have access to LN2. I have tried using the CACl2*6H2O with the correct mass ratio but unfortunately it doesn’t stay cool long enough or low enough (at least with a total bath ~200g), and quickly ramps back up to RT. At most it has reached -30C despite my attempts to crush the ice well and stir vigorously in a dewar flask.

I was wondering if any of you have been able to maybe use liquid nitrogen and a solvent to maintain roughly this temperature? I’m thinking intermittently adding LN2 to a solvent and try to keep the temperature “stable”.

Any advice is appreciated:)