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PBT assessment

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PBT assessment: overall result

PBT status:
the substance is not PBT / vPvB

Alcohols, C9 -C11, branched is readily biodegradable in the aqueous environment (70% in 28 days), and therefore does not meet the P or vP criteria.

Both aqueous exposure bioconcentration tests, as well as dietary exposure bioaccumulation tests with Alcohols, C9 -11 -iso-, C10-rich (Isodecanol) and with Alcohols, C11 -14 -iso, C13 -rich (Isotridecanol), were conducted with the rainbow trout, Oncorhynchus mykiss. In the aqueous exposure, the trout reached steady-state within a 10 day (Isotridecanol) or 16 day (Isodecanol) exposure period. The calculated mean lipid normalized steady state BCF(ssl) values were 21 L/kg (Isodecanol) and 39 L/kg (Isotridecanol) wet fish weight. The calculated dietary, lipid-corrected BMF values were <= 0.016 (at 500 and 2500 ppm treatment levels) for both substances, with growth corrected whole body half-lives less than 0.6 days. As bioaccumulation is positively correlated with hydrophobicity, the BCF and BMF for Isoundecanol can be expected fall within the range listed above. Both the aqueous and dietary bioaccumulation studies indicate that these substances exhibit a low potential to bioaccumulate.