Registration Dossier
Registration Dossier
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EC number: 295-361-6 | CAS number: 92044-82-1
Endpoint summary
Administrative data
Description of key information
The transport and distribution of Fatty acids, C9-13-neo-, barium salts is most accurately evaluated by seperately assessing the fate of its constituents barium and neodecanoate. Please refer to the data as submitted for each individual assessment entity.
Barium
The coefficient for partitioning of barium between particulate matter and water (Kpsusp) of 5,217 L/Kg was derived for EU waters whereas the Kp for the distribution between sediment and water (Kpsed) was estimated with 3,478 L/kg. For soil, a solid-water partitioning coefficient of 60.3 L/kg was determined experimentally.
Neodecanoic acid
The logKoc of neodecanoic acid is estimated with 121 L/kg. The vapor pressure is very low, i.e. 0.65 Pa suggesting a limited volatilization from soil. Henry’s Law constant for neo-decanoic acid is calculated with 0.54 Pa-m3/mole at 25 °C indicating that volatilization from water is not expected to occur at a rapid rate, but may occur. Neodecanoic acid is a weak organic acid with an estimated dissociation constant (pKa) of 4.69. Consequently, neodecanoic acid, at neutral pH, typical of most natural surface waters, is expected to dissociate to the ionised form and therefore to remain largely in water.
Additional information
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