Registration Dossier

Administrative data

Link to relevant study record(s)

Description of key information

The Henry’s law constant for di (2-hydroxypropyl)tallow amine is calculated using EPIsuite and from the ratio of the vapour pressure (Pa) and the water solubility (mg/L) as determined at pH 9.3. The vapour pressure of di (2-hydroxyethyl) cocoalkylamineof 0.00073 Pa is used for the calculation of the Henry’s law constant as a worst-case.

Key value for chemical safety assessment

Henry's law constant (H) (in Pa m³/mol):
1.36
at the temperature of:
25 °C

Additional information

Volatilisation of organic compounds from surface waters is generally estimated by the Henry’s law constant. The Henry’s law constant for di (2-hydroxypropyl)tallow amine is calculated using EPIsuite and from the ratio of the vapour pressure (Pa) and the water solubility (0.2 mg/L or 5.363 * 10^-4 mol/m3) as determined at pH 9.3. The vapour pressure of di (2-hydroxyethyl) cocoalkylamineof 0.00073 Pa is used for the calculation of the Henry’s law constant as a worst-case.

Substance

Henry’s Law constant Pa. m3/mol

Di (2-hydroxy propyl) tallow amine

CAS no: 68951-72-4)

1.885 * 10-4(calculated EPI)

1.36 (calculated from ratio VP/S) 

*If the Henry’s law constant is in the range 10-2< H < 1 Pa.m3/ mol, the test substance volatilizes slowly at a rate dependent on the Henry’s law constant. If the Henry’s law constant is in the range 1 < H < 102Pa.m3/mol, the test substance volatilizes not rapid but possibly significant.