Registration Dossier

Environmental fate & pathways

Endpoint summary

Administrative data

Description of key information

Additional information

Stability:

Phototransformation in air:

Calculation by EPI-Suite, EPA (USA) v3.20:

Atmospheric Oxidation (25 deg C): Hydroxyl Radicals Reaction: OVERALL OH Rate Constant = 0.2460 E-12 cm3/molecule-sec Half-Life = 43.475 Days (12-hr day; 1.5E6 OH/cm3)

Hydrolysis:

Aqueous Base/Acid-Catalyzed Hydrolysis (25 ºC) [HYDROWIN v.1.67]: Total Kb for pH > 8 at 25 deg C : 9.371E+000 L/mol-sec.

Kb Half-Life at pH 8: 20.544 hours

Kb Half-Life at pH 7: 8.560 days

Biodegradation:

Biodegradation in water: screening tests: Readily biodegradable: 61% after 8 days and 80% after 28 days (OECD 301F). Based on these results, it is concluded that the test substance methyl chloroacetate is readily biodegradable. This result is supported by further experimental data on readily biodegradabiliy (OECD 301E), experimental data on inherent biodegradability (OECD 302B) and estimated data (EPI Suite).

Bioaccumulation:

The estimated bioaccumulation factor is 3.162 (BCFWIN v2.17). The Log BCF from regression-based method is 0.500. The log Pow used is 0.63 (estimated). Based on the estimated data, the substance is considered to have a low bioaccumulation potential.

Transport and distribution:

Adsorption/desorption:

Calculation by EPI-Suite, EPA (USA) v3.20 / PCKOCWIN v1.66: Koc=6.423; Log Koc=0.808

Henry´s Law constant:

Weight of evidence: Calculation by EPI-Suite and experimental data (EPI-Suite): The Henry´s law constant is between 2.37 x 10-05 and 6.18 x 10-05 atm.m3/mol

Distribution modelling:

Calculation by EPI-Suite, EPA (USA) v3.20 / Fugacity_LEVEL3NT:

Persistence time: 347 h = 14 d

Half lifes; Air: 1,040 h = 43 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: 26.8 h; from Model Lake: 379.7 h = 15.82 d