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EC number: 272-729-4
CAS number: 68910-05-4
A complex residuum from the fractionation of the reaction products of 2-aminoethanol with ammonia to remove piperazine. It may contain such compounds as 2-[(2-aminoethyl)amino]ethanol, (aminoethyl)piperazine, (hydroxyethyl)piperazine.
Not readily biodegradable (according to OECD criteria)
The assessment of biodegradation of the multi-constituent substance is
performed by regarding the biodegradation rates of the single
substances. Only one component is measured to be readily biodegradable (
2 -(2 -aminoethylamino)ethanol, CAS 111-41-1). For CAS 111-40-0,
2,2-Diaminodiethylamine, CAS 112-24-3, Triethylenetetramine and CAS
140-31-8, N-Aminoethylpiperazine measured data are available whereas for
CAS 103-76 -4, 1 -Piperazineethanol only QSAR-Data on ready
biodegradability are available. Nevertheless, all available data clearly
indicate that these substances are not readily biodegradable according
to OECD criteria. For the polymers, which are also part of the
multi-constituent substance, no data are available and no QSAR
calculation can be performed. Due to their molecular structure as
polymers, no ready biodegradation is assumed.
Overall it can be stated, that due to the given facts, ready
biodegradability cannot be assumed for this multi-constituent substance.
This statement is supported by a test similiar to OECD guideline 302B,
performed with industrial activated sludge on the mixture (BASF 1982).
After 20 days of exposure a TOC removal of 30-40% was estimated.
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