I am trying pretty hard to find a better ecological alternative to silicone-based vacuum pump oil. It gets used pretty often and it is quite expensive.
Can anyone help me find the answer to this question?
https://www.quora.com/unanswered/What-type-of-natural-vegetable-oil-has-the-highest-vapor-pressure
I know that differnt types of vegetable oils boil at different temperatures, but I believe the vapor pressure is the more important quality to know about oil for this application. Because I don’t want the oil to boil easily at low pressures.
The ultimate vacuum is 25 µmHg or 0.03 Torr.