The Chemical Physical State and Unit options are outlined below:
- Radioactive substance - millicurries
- Liquid substance (including liquefied gas) - gallons
- Solid substance - pounds
- Gas (vaporous) - cubic feet
Select the appropriate physical state of the the chemical, and the unit of measure will populate automatically with the exception of gas. For a gas, you will need to select either gallons (liquefied gas) or cubic feet (vaporous gas).