Registration Dossier
Registration Dossier
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EC number: 259-393-4 | CAS number: 54914-37-3
Endpoint summary
Administrative data
Description of key information
Additional information
Distribution modelling according to Mackay Level I indicates that the main target compartment will be the atmosphere with approximately 74 %, followed by soil and sediment with about 12 % each. However, environmental distribution considerations for 1,3,3-trimethyl-N-(2-methylpropylidene)-5-[(2-methylpropylidene)amino]cyclohexanemethylamine are of little relevance because the reaction with water is expected to eliminate the substance from the environment rapidly. The Henry’s Law constant and the adsorption to soil and sediment cannot be determined because of the substance’s liability to hydrolysis.
The rate constant of the OH radical sensitized indirect photodegradation of 1,3,3-trimethyl-N-(2-methylpropylidene)-5-[(2-methylpropylidene)amino]cyclohexanemethylamine has been calculated as 19.0388E-12 cm³/(molecule*sec). This corresponds to a half-life of 20 hours at a 24 hour mean OH radical concentration of 500000 molecule/cm³, which is typical for of Central Europe. The substance is hydrolyzed completely within 2.4 hours at 50 °C and pH 4, 7, and 9 each. 1,3,3-Trimethyl-N-(2-methylpropylidene)-5-[(2-methylpropylidene)amino]cyclohexanemethylamine was tested in a manometric respirometry test according to OECD Guideline 301 F, resulting in a biodegradation rate of 34 % of the ThODNH4 in 28 days. Though not readily biodegradable under test conditions, moderate biodegradation presumably will occur in the environment. The predominant degradation pathway in the environment is expected to be hydrolysis followed by biodegradation of the resulting substances. The partition coefficient 1-octanol/water was determined as log Kow = 5.2 at 25 °C, indicating high potential for bioaccumulation. However, rapid hydrolysis inhibits bioaccumulation.
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