Registration Dossier
Registration Dossier
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EC number: 203-497-4 | CAS number: 107-51-7
Endpoint summary
Administrative data
Description of key information
Additional information
L3 hydrolyses with a half-life13.7 days at pH 7 and 25°C.
A half-life of 13 days for reaction with hydroxyl radicals in air has been calculated for L3.Phototransformation in water and soil are not expected to besignificant removal processes for L3.
Biodegradation of 0% in 28 days has been determined for L3.
Data are available for degradation in soil simulation testing. Half-lives (closed tubes) of 1.48 d at 32% RH and at 22.5°C to 119.5 d at 100% RH and at 22.5°C(estimated to be 24 days when corrected for amount of L3 predicted to be in headspace at this RH)have been determined for Michigan Londo soil. A half-life (closed tubes) of 0.26 d at 32% RH has been determined for Buxton, UK loamy silt soil. In open systems at higher RH, volatilisation became the predominant removal process, with a volatilisation half-life <1d at 100% RH at 22.5°C.
In exposure modelling (EUSES 2.1.2) a half-life value of 10 days at 20°C will be used, based on the value of 6.19 d (#1) (92% RH 22.5°C Closed). This is an estimate. The exact value is not significant in respect of the overall risk characterisation for soil.
L3 has a sediment degradation half-life of 6.91 years at 12°C.
Table: Degradation rates
Degradation rate in water: |
Hydrolysis half-life 13.7d at pH 7 and 25°C. No significant biodegradation. |
Degradation rate in sediment: |
L3 has a sediment degradation half-life of 6.91 years at 12°C. |
Degradation rate in soil: |
Michigan Londo soil, half-lives (closed tubes) 1.48 d at 32% RH and at 22.5°C to 119.5 d at 100% RH and at 22.5°C (estimated to be 24 days when corrected for amount of L3 predicted to be in headspace at this RH). UK loamy silt soil, half-life (closed tubes) 0.26 d at 32% RH and at 22.5°C. In exposure modelling (EUSES 2.1.2) a half-life value of 10 days at 20°C will be used. |
Degradation rate in air: |
Rate constant for reaction with OH radicals in air: 1.2 E-12 cm3molecule-1second-1(half-life 13days) (Calculated) |
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