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EC number: 403-140-4 | CAS number: 103694-68-4 MAJANTOL; MAJANTOL R
Henry's Law constant
Administrative data
Link to relevant study record(s)
- 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
- Remarks:
- Henry's law constant is calculated in accordance with ECHA's Guidance document R16, equation R16-4.
- Principles of method if other than guideline:
- Henry's law constant is calculated in accordance with ECHA's Guidance document R16, equation R16-4 using the experimentally determined values for vapour pressure and water solubility.
- Key result
- H:
- 1.88 Pa m³/mol
- Temp.:
- 20 °C
- Conclusions:
- The Henry's law constant was calculated to be 1.88 Pa m³/mol.
- Executive summary:
The HLC was calculated in accordance with equation R.16-4 of the ECHA Guidance on IR & CSA, using experimentally determined values for vapour pressure and water solubility. The resulting value is: HLC = 1,88 Pa m3/mol at 20°C, indicating a low potential to volatilize from the water phase to the atmospheric compartment.
Reference
Henry's Law Constant (HLC) is calculated as described in ECHA's Guidance on Information Requirements and Chemical Safety Assessment R.16, using the following equation:
HLC = VP * MW / WS
With:
- VP = Vapour pressure expressed in Pa
- MW = Molecular weight expressed in g/mol
- WS = Water Solubility expressed in mg/L (which is equivalent to g/m3)
- HLC = Henry constant expressed in Pa * m3/ mol
The input parameters used are:
- VP = 2.8 Pa at 20°C
- MW = 178.3 g/mol
- WS = 265.8 mg/L
Hence, the resulting HLC is:
HLC = 1.88 Pa * m3/ mol
Description of key information
Henry's law constant was calculated in accordance with equation R.16-4 of the ECHA Guidance on IR & CSA, using experimentally determined values for vapour pressure and water solubility.The resulting value is: HLC = 1.88 Pa * m3/ mol at 20°C
Key value for chemical safety assessment
- Henry's law constant (H) (in Pa m³/mol):
- 1.88
- at the temperature of:
- 20 °C
Additional information
The Henry's Law constant (HLC) was calculated according to ECHA Guidance R.16 (ECHA, 2016) using the molecular weight, water solubility and vapour pressure as input parameters. A HLC of 1.88 Pa m³/mole at 20 °C was calculated indicating a low potential to volatilize from the water phase to the atmospheric compartment.
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