Registration Dossier
Registration Dossier
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EC number: 603-931-6 | CAS number: 135800-37-2
PBT assessment
Administrative data
PBT assessment: overall result
- PBT status:
- the substance is not PBT / vPvB
- Justification:
Grouping of these short chain alkyl esters are justified as they are all are characterised by low water solubility on one hand and high Koc/Kow values on the other hand. Furthermore, members of the category are known to be metabolised in fatty acids and their respective alcohol component.
For all members of the SCAE C2-8 category (short chain alcohol ester) no intrinsic effects at the range of water solubility were observed (water solubility < 1 mg/L). No toxicity to fish or microorganisms, E(L)C50 values, were reported at nominal concentrations >100 mg/L. In some daphnia and algae studies physical effects, well above the limit of water solubility, were observed, when unfiltered test substance was present.
In water, Fatty acids, C8-16, 2-ethylhexyl esters is highly insoluble and hydrolytically stable (half life >1 year). Based on the physico-chemical properties (such as low water solubility) and high adsorption potential, sediment and soil are expected to be the main targets for environmental distribution. However, due to the ready biodegadability, the substance will not persist in these compartments. The low vapour pressure and low water solubility, suggests little evaporation into air, however if emitted into the air Fatty acids, C8-16, 2-ethylhexyl esters is susceptile to indirect photodegradation (DT50 < 24hr, SRC AOP v1.92). Bioaccumulation is not expected due to the acknowledged rapid metabolisation and excretion of linear aliphatic fatty acid esters from fish and the omnipresence of the responsible enzyme, carboxylesterase, on many organism levels.
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