kcal/mol/ppb**2
| Allowed Value | Details | 
|---|---|
| kJ/mol/ppb**2 | kilojoules per mole per part per billion squared | 
| kcal/mol/ppb**2 | kilocalories per mole per part per billion squared | 
| other | author added units | 
| Allowed Value | Details | 
|---|---|
| kJ/mol/ppb**2 | kilojoules per mole per part per billion squared | 
| kcal/mol/ppb**2 | kilocalories per mole per part per billion squared | 
| other | author added units |