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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

Diss Factsheets

Environmental fate & pathways

Endpoint summary

Administrative data

Description of key information

Additional information

Stability: Phototransformation in air: Weight of evidence: results from EPI Suite estimations. It is concluded that the rate constant for the vapor-phase reaction of ethyl chloroacetate with photochemically-produced hydroxyl radicals has been estimated as 1.211x10-12c m3/molecule-sec at 25ºC using the AopWin v1.92 model of EPI-Suite v3.20 calculation. This corresponds to an atmospheric half-life of about 8,8 days (12 -hours day) at an atmospheric concentration of 1,5 x10+6hydroxyl radicals/cm3.

Stability: Hydrolysis: A base-catalyzed second-order hydrolysis rate constant of 8.851 L/mol-sec was estimated using EPI Suite calculation (EPA, US); this corresponds to half-lives of 9,1 days and 21,8 h at pH values of 7 and 8, respectively.

Biodegradation in water: screening test: For the results of testing the biodegradability of ethyl monochloroacetate in the respirometric test (COD 75% in 28 days) the following evaluation was stated: Ethyl monochloroacetate is readily biodegradable (according to the OECD definition of "readily degradable"). According to OECD TG 301 F, EU Method C.4-D, ISO DIS 9408 and DIN-EN 29408 guidelines. This result is supported by further experimental data on inherent biodegradability (OECD 302B) and estimated data (EPI Suite).

Bioaccumulation: aquatic/sediments: Using the BVFWIN v2.17a model of EPI Suite v3.20 the bioaccumulation factor of ethy chloroacetate is 3.162, and this BCF suggests the potential for bioconcentration in aquatic organisms is low.

Transport and distribution: Adsorption/desorption: Using the PCKOCWIN v1.66 of EPI Suite v3.20, the adsorption coefficient (Koc) of ethyl chloroacetate is estimated as 11.85, using a log Koc of 1.074. This estimated coefficient value suggest that ethyl chloroacetate is expected to have very high adsorption.

Transport and distribution: Henry's Law constant: Using the HENRYWIN v3.10 model of EPI Suite v3.20, the Henry's Law constant for ethyl chloroacetate is estimated as 54.41x10-6atm.m3/mole at 25 ºC. This Henry's Law constant indicates that ethyl chloroacetate is expected to volatilize from water surfaces and volatilization from moist soil surfaces may occur.

Transport and distribution: Distribution modelling: Using the Fugacity_LEVEL3NT model of EPI Suite, EPA (US) v3.20 the following results were obtained: Percent distribution in media: Air: 10.4%; Water: 41.9%; Soil: 47.6%; Sediment: 0.08% Persistence time: 326 h = 14 d Half lifes; Air: 212 h = 9 d; Water: 360 h = 15 d; Soil: 720 h = 30 d; Sediment: 3,240 h = 135 d; Volatilization from water; Half life vom Model river: 17.09 h; from Model Lake: 279.3 h = 11.64 d Distribution modelling: Using the Fugacity_LEVEL3NT model of EPI Suite, EPA (US) v3.20 the following results were obtained: Percent distribution in media: Air: 10.4%; Water: 41.9%; Soil: 47.6%; Sediment: 0.08% Persistence time: 326 h = 14 d Half lifes; Air: 212 h = 9 d; Water: 360 h = 15 d; Soil: 720 h = 30 d; Sediment: 3,240 h = 135 d; Volatilization from water; Half life vom Model river: 17.09 h; from Model Lake: 279.3 h = 11.64 d.