Amines, N-(3-aminopropyl)-N’-[3-(C16-18 (even numbered) and C18 unsaturated alkyl amino)propyl]trimethylenedi- and amines, N-(3-aminopropyl)-N’-(C16-18 (even numbered) and C18 unsaturated alkyl)trimethylenedi-

Endpoint summary

Additional information

Tallow tripropylenetetramine (composition of the oleyl-alkyl chain is specified by Karleskind (1996)) is an alkyl polypropylene polyamine. Only one valid ready biodegradability test result for alkyl polypropylenepolyamines is available because these substances are very toxic to microorganisms. Nevertheless all aspects important to show non persistence of oleyl tripropylenetetramine are available i.e. 1) ultimate (complete) biodegradation (demonstrated in (S)CAS tests and through read across) 2) high rates of degradation (through read across with coco dipropylenetriamine) and 3) occurrence of competent microorganisms in unacclimated ecosystems (through read across with coco dipropylenetriamine) are fulfilled. Tallowltripropylenetetrariamine is at present viewed as not persistent.

 

Table Summary of degradation rate constants in various (eco)systems based the ready biodegradability of alkyl dipropylene triamines.

(Eco)system	Method
Surface water (fresh)	TGD default value	30 days half-life
Surface water (fresh) sediment	TGD default value	3000 days half-life
Marine water	TGD default value	50 days half-life
Marine water sediment	TGD default value	30000 days half-life
Soils	TGD default value	30000 days half-life^a
Degradation in sewage treatment plants	Determined in bioreactors	>99.8% removal primarily by biodegradation

^aHalf-life of the fraction dissolved in the water phase is expected to in the order of a few days.