Registration Dossier
Registration Dossier
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EC number: 273-227-8 | CAS number: 68953-84-4
Endpoint summary
Administrative data
Description of key information
Additional information
Using standard ready biodegradation test conditions, the test chemical displays negligible degradation.
1) Key: Biodegradation screening test: K2, per OECD 301F & GLP guideline; not readily biodegradable
2) Supporting: biodegradation screening test: K2, per OECD 301F & GLP guideline; not readily biodegradable
As a consequence the biodegradation potential of DAPD was further assessed in a number of inherent biodegradation studies. In these studies a surfactant is added to the test bottles in order to enhance the water solubility of the test substance, a lower concentration of test substance is used and an elevated sludge concentration when compared to a ready biodegradation test.
3) Supporting: Inherent biodegradation test: K2, per OECD 302C: no degradation
4) Supporting: Inherent biodegradation test: K1, per OECD 301B and 302C & GLP guideline; potential to degrade
5) Key: Inherent biodegradation test: K1, per OECD 301B and 302C & GLP guideline; inherent biodegradation observed
In these inherent biodegradation tests it was demonstrated that slow inherent biodegradation of DAPD does occur, yielding 23 to 37% of mineralisation after 56 -63 days. Furthermore, primary degradation of DAPD into water soluble metabolites / degradation products was found to occur much faster and lead to the complete removal of the parent compound from the test system within 28 days.
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