Additional: this is after we subject a plant extract (extracted with 50%, 70%, and 96% EtOH) to rotary evaporation

Yes, ethanol evaporates easily at 30 to 40 celsius. it will dry after a few minutes.

The temperature and time settings for evaporating ethanol off a plant extract will depend on the amount of ethanol present and the desired final concentration. Generally, the temperature should be set between 50-60°C and the time should be set for 15-30 minutes.

It is important to note that the oven should be closed during the evaporation process to ensure that the ethanol does not escape into the atmosphere.