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Environmental fate & pathways

Henry's Law constant

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Reference
Endpoint:
Henry's law constant
Type of information:
calculation (if not (Q)SAR)
Adequacy of study:
supporting study
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
accepted calculation method
H:
0.13 Pa m³/mol

HENRY = (VP x MOLW) / SOL

= (340 x 129.2) / 350000

= 0.13 Pa m3/mol

where:

VP (vapour pressure) = 340 Pa

MOLW (molecular weight) = 129.2 g/mol

SOL (water solubility) = 350000 mg/L

Conclusions:
Henry's Law constant was determined to be 0.13 Pa m3/mol.

Description of key information

No study was submitted for this endpoint. The value was determined using the algorithms presented in ECHA Guidance on Information Requirements and Chemical Safety Assessment, Chapter R16.

Key value for chemical safety assessment

Henry's law constant (H) (in Pa m³/mol):
0.13

Additional information

Henry's Law Constant was derived using the following calculations:

HENRY = (VP x MOLW) / SOL

= (340 x 129.2) / 350000

= 0.13 Pa m3/mol

where:

VP (vapour pressure) = 340 Pa

MOLW (molecular weight) = 129.2 g/mol

SOL (water solubility) = 350000 mg/L