Registration Dossier
Registration Dossier
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EC number: 292-564-1 | CAS number: 90640-45-2
Endpoint summary
Administrative data
Description of key information
Additional information
Biodegradation screening tests are available for various structurally related alkyl-1,3-diaminopropanes. All alkyl-1,3-diaminopropanes under consideration consist of carbon, hydrogen and nitrogen only. The basic structure of all alkyl-1,3-diaminopropanes consists of a hydrocarbon chain with a 1,3-propanediamine group at the end of the chain. The only difference consists of differing chain lengths and slight variations in the degree of saturation in the alkyl chain. Therefore, significant changes in chemical behavior and/or reactivity is not to be expected and the experimental data available for this group of alkyl-1,3 -diamines are used for the evaluation of the biodegradability of Amines, N-C16-22-alkyltrimethylenedi-.
Based on the available studies on biodegradation, all alkyl 1,3 -diaminopropanes are considered to be readily biodegradable. The 10-days-window criterion does not need to be evaluated as the alkyl 1,3 -diaminopropanes are UVCB substances. No simulation tests for degradation rates under environmental conditions are available, therefore the default values suggested in the REACH guidance may be used. Because of the observed ready biodegradability there is no requirement for performing biodegradation simulation tests (Annex IX. 9.2.1.3).
A waste water treatment simulation test was performed with amines, N-C16-18-alkyl (even-numbered) propane-1,3-diamine (133779-11-0). 99.4% removal was observed using specific chemical analyses (LCMS/MS) of the effluent during day 56 to 60 (n=5). In addition, sorption to sludge was measured and this accounted for 4.1% of the total removal, which means that 95.3% was removed by biodegradation.
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