Registration Dossier
Registration Dossier
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EC number: 607-233-2 | CAS number: 2343-89-7
Endpoint summary
Administrative data
Description of key information
Stability in the Environment
In accordance with Annex X of the Regulation (EC) No 1907/2006 concerning the Registration, Evaluation, Authorisation and Restriction of Chemicals (REACH), information regarding the photo-transformation in air, as well as in water and soil, is not mandatory.
A reliable study for hydrolysis for 2-propenoic acid, 2-fluoro, methyl ester is available and included in the dossier (Walker, 2015). At pH 4 the hydrolysis half-life of 2-propenoic acid, 2-fluoro, methyl ester is estimated to be greater than 1 year and 2-propenoic acid, 2-fluoro, methyl ester may be considered hydrolytically stable at this pH. At pH 7 and 9 the hydrolysis half-life of 2-propenoic acid, 2-fluoro, methyl ester was estimated to be 69.4 and 3.2 hours, respectively. The results of this study indicate 2-propenoic acid, 2-fluoro, methyl ester is hydrolytically unstable at environmentally relevant pHs (pH 7 to 9).
Biodegradation
A reliable study (Klimisch 1) for biodegradation in water for 2-propenoic acid, 2-fluoro, methyl ester is available and included in the dossier (Best, 2015). After 28 days, 2-propenoic acid, 2-fluoro, methyl ester achieved 35% degradation and is not readily biodegradable.
Reliable studies on the biodegradation in sediment and soil are waived. In accordance with Column 2 of REACH Annex IX, the simulation test on ultimate degradation in surface water, the soil simulation test and the sediment simulation test (required in Sections 9.2.1.2, 9.2.1.3 and 9.2.1.4 respectively) do not need to be conducted as direct or indirect exposure of soil and sediment is unlikely. The chemical safety assessment does not indicate any need to investigate further the degradation of the substance and its degradation products. Also, the substances low potential to adsorb or partition to soil and sediment are demonstrated by the low Koc (<1.25) and very low log octanol-water partition coefficient (Log Kow) of 0.931. Therefore, no additional degradation testing is necessary based on unlikely exposure.
Bioaccumulation
In accordance with Column 2 of Annex IX of the REACH Regulation, the bioaccumulation test on aquatic organisms need not be conducted when the substance has a low potential for bioaccumulation, for instance when the Log Kow is <3. In addition, bioaccumulation testing on terrestrial organisms is also not required when the Log Kow is <3 and direct or indirect exposure of the aquatic (or terrestrial) environment is unlikely. A reliable partition coefficient study using OECD Guideline 117 measured a Kow of 8.54 or Log Kow of 0.931. The measured Log Kow is substantially lower than the REACH threshold indicative of bioaccumulation potential and the substance is therefore considered not bioaccumulative (B) or very bioaccumulative (vB) and testing is waived. In addition, exposure to sediment or terrestrial organisms is not predicted based on the unlikely potential for exposure to these organisms.
Additional information
Information on Registered Substances comes from registration dossiers which have been assigned a registration number. The assignment of a registration number does however not guarantee that the information in the dossier is correct or that the dossier is compliant with Regulation (EC) No 1907/2006 (the REACH Regulation). This information has not been reviewed or verified by the Agency or any other authority. The content is subject to change without prior notice.
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