Registration Dossier
Registration Dossier
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EC number: 251-020-3 | CAS number: 32388-55-9
Endpoint summary
Administrative data
Description of key information
Additional information
Abiotic degradation:
The substance does not decompose in water under environmental pH as the absence of hydrolytic group in molecular structure.
Biodegradation:
In a biodegradation test according to OECD 301 F, the substance showed 36 % biodegradation after 28 days in the test conditions. The substance is not readily biodegradable.
In the biodegradation in water: simulation testing on ultimate
degradation in surface water according to OECD 309, Methyl cedryl
ketone degraded slowly in the surface water with estimated DT50
values of 34.4 days (at nominal 10 µg/L) and 39.3 days (at
nominal 100 µg/L) . Methyl cedryl ketone degraded to two major unknown
degradation products; unknown B (tentatively identified as a
di-oxygenated and hydrated form of methyl cedryl ketone with a molecular
formula of C17H28O3)
and unknown C (tentatively identified as a di-oxygenated form of methyl
cedryl ketone with a molecular formula of C17H26O3).
Only a small amount of mineralization was observed, accounting for a
maximum of 0.7% AR as carbon dioxide. Volatile radioactivity, confirmed
as methyl cedryl ketone, adhered to the test vessel adapter heads and to
the plastic tubing of the trap lines between the test vessel and the
first trapping vessel.
Bioaccumulation and Geoaccumulation:
A BCF of 3920 was determined according to OECD 305. This value indicated this substance have potential for bioaccumulation.
The absorption factor (Log Koc) ranges from 3.5 to 5.1 which indicated the potential for accumulation in soil.
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