Registration Dossier
Registration Dossier
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EC number: 603-520-1 | CAS number: 131807-57-3
Endpoint summary
Administrative data
Description of key information
In a hydrolysis study, the degradation of the test material in aqueous solutions at pH 5, 7, and 9 were studied. At pH 9, the test substance was rapidly degraded with a half-life of 1.55 hours (0.0646 day). At pH 7, the half-life was 2 days, and at pH 5, the half-life was 41 days. Identified products included IN-MN968, IN-JL856, IN-JS940, IN-H3310, phenol, catechol, and benzene. Polar, organic acid(s) were even characterized The photolysis of the test substance was studied in aqueous, buffered solution at pH 5, in natural water (pH 7.75) under non-sterile conditions, both in the light and in darkness. At pH 5, the test substance was degraded with a half-life of 4.6 days in actual natural sunlight equivalents. In irradiated, non-sterile natural water (pH 7.75), the test substance was rapidly degraded with a half-life of 3.9 hours (dark control 5.0 hours). The major photolytic pathways yielded IN-Н3310, IN-JS940, and IN-KF015 from the phenoxphenyl portion of the test substance. Stable products from the phenylamino portion of the molecule were phenol, polar adds (fumaric, oxalic, and formic), and carbon dioxide. The Phototransformation in soil study was conducted following US EPA guideline 161-3. Under the conditions of this study, the test substance degraded with a calculated average first-order half-life of 4.1 days (11.5 days correlated to natural sunlight) while under nonirradiated conditions the average half-life was greater than 30 days.
The test substance can be >70% degraded (biotically and/or abiotically) in the aquatic environment within a 20-day period. Under aerobic conditions in surface water, DT50 value ranged from 0.7 hours to 2.05 days. In Anerobic Sediment simulation testing conducted by OECD 308, DT50 ranged from1.3 to 1.8 days. Under aerobic conditions in soil, DT50 value ranged from 2 to 11 days. In Anerobic metabolism soil study conducted by OECD 307, DT50 ranged from 3.5 to >365 days.
The BCF in whole fish was determined to be 2400 to 3400 (steady state). Batch equilibrium adsorption and desorption studies were performed in different soils. The adsorption coefficients Kd and Koc were 123 mL/g and Koc: 3307 mL/g in Silty clay loam soil. The adsorption coefficients Kd and Koc were 17-98 and Koc: 3740 in Silty clay loam soil.
Additional information
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