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Henry's Law constant

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Reference
Endpoint:
Henry's law constant
Type of information:
calculation (if not (Q)SAR)
Remarks:
Migrated phrase: estimated by calculation
Adequacy of study:
key study
Study period:
23 March 1995
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
accepted calculation method
Qualifier:
no guideline required
Principles of method if other than guideline:
The Henry‘s Law Constant for Thiram was calculated from Equation (15-8) in Handbook of Chemical Property Estimation Methods, ed. by W.T. Lyman, W.F. Reehl and D.H. Rosenblatt, McGraw-Hill, Inc., New York, 1982.
GLP compliance:
no
H:
0.033 Pa m³/mol
Temp.:
25 °C

Eq (15-8) H = Pvp/S

where H = Henry‘s Law Constant (atm m3/mole)

Pvp = Vapor pressure at a temperature T (in atm)

S = Solubility in water at a temperature T (in mole/m3)

For the chemical Thiram:

Pvp (25°C) = 1.7 x 10exp-5 mm Hg (1)

S (25°C) = 1.65 x 10exp-6 g/mL (2)

Description of key information

The calculated Henry's Law Constant of tetramethylthiuram disulfide is 0.033 Pa m³/mol at 25 °C.

Key value for chemical safety assessment

Henry's law constant (H) (in Pa m³/mol):
0.033
at the temperature of:
25 °C

Additional information

In the available study, the Henry's Law Constant was calculated from the vapor pressure of the compound at 25 °C and the water solubility at 25 °C. The Henry's Law Constant was calculated as 0.033 Pa m³/mol.