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EC number: 200-820-0
CAS number: 74-89-5
Calculation with HENRYWIN v3.20 (EPIWIN software by US-EPA): Bond Method: 7.68E-1 Pa*m³/mol; Group Method: 7.31E-1 Pa*m³/mol
Henrys LC [via VP/WSol estimates using User-Entered or Estimated values]: 3.106E-005 atm-m³/mol (this value has been used to estimate the PNECSoil via the Equilibrium Partitioning method)
Henry´s Law constant of the test substance was determined by HENRYWIN
v3.20 (EPIWIN software) by US-EPA. Henry´s law states that the
solubility of a gas in a liquid solution at a constant temperature will
be proportional to the partial pressure of the gas which is above the
solution (Henry, W., 1803). Sometimes, the term “air/water partition
coefficient” refers to the dimensionless Henry´s law constant (HLC) and
therefore describes the ration of the equilibrium concentration of a
dissolved substance in air and water. HENRYWIN estimates two separate
HLC values (one using the group method and one using the bond method).
The bond contribution methodology splits a compound into smaller units
(one atom to another atom only). The bond method includes individual
hydrogen bond values; the group method does not. Using the Bond Method
by HENRYWIN, a Henry´s Law Constant of 0.768
Pa*m³/mol was calculated for the substance at 25 °C. The Group Method
showed a value of 0.731 Pa*m³/mol at the same temperature. Henrys
LC [via VP/WSol estimates using User-Entered or Estimated values]:
3.106E-005 atm-m³/mol (this value has been used to estimate the PNECSoil
via the Equilibrium Partitioning method)
Henry´s Law Constant of 0.000011 atm m³ / mol at 25°C (equals 1.11 Pa
m³/mol) for monomethylamine was also referenced in the experimental
database of EPIWIN. The original source is indicated as Christie and
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