Registration Dossier
Registration Dossier
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EC number: 200-875-0 | CAS number: 75-50-3
Henry's Law constant
Administrative data
Link to relevant study record(s)
Description of key information
From the water surface, Trimethylamine will slowly evaporate into the atmosphere.
Key value for chemical safety assessment
- Henry's law constant (H) (in Pa m³/mol):
- 3.7
- at the temperature of:
- 25 °C
Additional information
At 25 °C a Henry´s Law Constant of 3.7 Pa m3/mol was calculated. However, the model does not consider the ionic form of the molecule at environmental conditions; hence, distribution into air may be overestimated (Chemservice S.A., 2018). A SRC recommended value of 0.000104 atm m3/mol (corresponding to 10.5 pa m3/mol) was additionally reported by Hine (1975).
Based on a weight-of-evidence approach by the available data, the substance is assessed to slowly evaporate into the atmophere from the water surface.
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