Registration Dossier

Environmental fate & pathways

Henry's Law constant

Currently viewing:

Administrative data

Link to relevant study record(s)

Description of key information

The QSAR determination of the Henry's Law Constant for the hydrolysis product tetrachlorophthalic acid using the model HENRYWIN included in the Estimation Program Interface (EPI) Suite v 4.1 revealed a value of 6.67E-08 Pa*m³/moL at 25°C.

Key value for chemical safety assessment

Henry's law constant (H) (in Pa m³/mol):
0
at the temperature of:
25 °C

Additional information

As tetrachlorophthalic anhydride hydrolysed rapidly in water, the calculated value for the Henry's law constant of 0.194 Pa*m³/mole is only of theroretical interest. The Henry's law constant was therefore calculated for the hydrolysis product tetrachlorophthalic acid (CAS 632-58-6) to be 6.67E-08 Pa*m³/mole, indicating that tetrachlorophthalic acid is of very low volatility from water surfaces.