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EC number: 201-075-4 | CAS number: 78-00-2
Henry's Law constant
Administrative data
- Endpoint:
- Henry's law constant
- Type of information:
- calculation (if not (Q)SAR)
- Remarks:
- Migrated phrase: estimated by calculation
- Adequacy of study:
- supporting study
- Reliability:
- 2 (reliable with restrictions)
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 1 985
Materials and methods
- Principles of method if other than guideline:
- No method detailed, supporting study
Test material
- Reference substance name:
- Tetraethyllead
- EC Number:
- 201-075-4
- EC Name:
- Tetraethyllead
- Cas Number:
- 78-00-2
- Molecular formula:
- C8H20Pb
- IUPAC Name:
- tetraethylplumbane
Constituent 1
Results and discussion
Henry's Law constant Hopen allclose all
- H:
- ca. 70 928 Pa m³/mol
- Temp.:
- 25 °C
- Remarks on result:
- other: Calculated from dimensionless Henry coefficient of about 30
- H:
- ca. 81 060 Pa m³/mol
- Temp.:
- 25 °C
- Remarks on result:
- other: Calculated from solubility and vapor pressure
Applicant's summary and conclusion
- Conclusions:
- The US EPA gives a dimensionless Henry's law constant (Cgas/Cwater) of approx 30 at 25°C. This equates to ca. 70928 Pa m³/mol using a calculation based on measurements of the phase equilibrium for water in gas concentrations of TEL over a temperature range 0 -37.5°C. At 25°C the gas in water ration is approx 30:1. An estimate of the Henry's Law constant via the water solubility (0.21 ppm) and the vapour pressure (0.38 mm Hg) at 25°C gives a similar value of ca.81060 Pa m³/mol
- Executive summary:
The US EPA gives a dimensionless Henry's law constant (Cgas/Cwater) of approx 30 at 25°C. This equates to ca. 70928 Pa m³/mol using a calculation based on measurements of the phase equilibrium for water in gas concentrations of TEL over a temperature range 0 -37.5°C. At 25°C the gas in water ration is approx 30:1. An estimate of the Henry's Law constant via the water solubility (0.21 ppm) and the vapour pressure (0.38 mm Hg) at 25°C gives a similar value of ca.81060 Pa m³/mol
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