Diquat dibromide

Henry's Law constant

Link to relevant study record(s)

Reference

Endpoint:

Henry's law constant

Type of information:

calculation (if not (Q)SAR)

Adequacy of study:

key study

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

accepted calculation method

Reason / purpose for cross-reference:

reference to other study

Reason / purpose for cross-reference:

reference to other study

Qualifier:

no guideline followed

Principles of method if other than guideline:

Henry’s law constant (H) was established by calculation using the vapour pressure and water solubility values of the test substance at 20 °C.

GLP compliance:

no

Key result

H:

0 Pa m³/mol

Temp.:

20 °C

Remarks on result:

other: determined by calculation

Table 1. Henry's Law Constant Calculation

Water solubility [pH]		Vapor pressure		H [2 sig fig]
g/L	Mol/m3a	Pa	atm	Pa m3 per mol	atm m3 per mol
718 [purified]	1982.9	1.6E-14	1.6E-19	8.07E-18	8.07E-23

Conclusions:

Henry's law constant has been calculated to be 8.07E-18 Pa m³/mol at 20 °C.

Executive summary:

Vapour pressure and water solubility values, both at measured at 20 °C, have been used to calculate the Henry's law constant of the test substance. The Henry's law constant was established at 8.07E-18 Pa m³/mol at 20 °C.

Description of key information

HLC = 8.07E-18 Pa m³/mol at 20 °C, calculated using the water solubility and the (new) vapour pressure of the substance at 20 °C based on the method described in Husband (2001) report.

Key value for chemical safety assessment

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

0

at the temperature of:

20 °C

Additional information

Volatilisation is considered to be negligible.