My mistake. It isn't liquid, but still how does someone determine how much is needed. Typically I think it only sprays for a maximum of 10 seconds. Is there a formula or ratio to determine amount needed?
I have a kid who wants to do a report on aerosols. As I understand, we have researched that for pepper spray devices liquid CO2 is used as a propellant, but we can't find out how they calculate the concentration. Is there a place we can find the right formulas needed?