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EC number: 203-865-4
CAS number: 111-40-0
Diethylenetriamine is a liquid with moderate vapor pressure (21.3 Pa at
20 °C); however, due to its miscibility with water, has low potential to
volatilize from water. The substance has a very low octanol-water
partition coefficient (log Kow = -1.58), which also inidcates a low
potential for uptake in aquatic organisms. Diethylenetriamine possesses
three amino groups, which will occur as charged species (cationic) under
pH conditions encountered in the environment. This cationic character is
responsible for its expected high affinity for adsorption to
soil/sediment, by a cation exchange mechanism. The substance is not
susceptible to hydrolysis or direct photolysis in the aquatic
environment. Therefore, biodegradation is expected to be the dominant
process affecting fate of this substance in the environment. Several
biodegradation screening tests of inherent or ready biodegradability
have indicated little or no biodegradation of the substance. However,
evidence from these studies suggests that results were confounded by
toxicity/inhibition of the microbial inocula by the relatively high
concentrations of diethylenetriamine tested. In one closed-bottle test
which employed a low test substance to inoculum ratio, ready
biodegradability was demonstrated after a prolonged lag phase. In
addition, there is evidence from other studies to suggest that a
relatively long acclimation period may be required for previously
unexposed inocula to attain the ability to degrade the substance.
Studies using low concentrations of the substance, and/or extended
incubation periods, have shown the substance to have potential for
ultimate biodegradability in the environment. This potential is verified
by simulation tests in sewage, soil, and lake water samples, where rapid
biodegradation was observed. As such, the substance is not regarded as
being persistent in the environment.
Information on Registered Substances comes from registration dossiers which have been assigned a registration number. The assignment of a registration number does however not guarantee that the information in the dossier is correct or that the dossier is compliant with Regulation (EC) No 1907/2006 (the REACH Regulation). This information has not been reviewed or verified by the Agency or any other authority. The content is subject to change without prior notice.Reproduction or further distribution of this information may be subject to copyright protection. Use of the information without obtaining the permission from the owner(s) of the respective information might violate the rights of the owner.
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