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EC number: 276-038-9
CAS number: 71808-53-2
Ethoxylated quaternary methylammonium chlorides are cations. This means
that they will sorb strongly to negatively charged surfaces like
glassware, soil and sediment. If emitted to the environment they are
expected to end up in sludge, and possibly in soil and sediments.
However, the substance is biodegradable which will limit the fraction
going to sludge, soil and sediment. > 99.99% removal (primarily through
biodegradation) was demonstrated in a CAS test. The substance is not
expected to evaporate.
A hydrolysis test has been waived because the substance is readily
biodegradable in accordance with column 2 of Annex VIII of Regulation
1907/2006/EC. According to EPIWIN calculations the reaction with
OH-radicals in air would result in a half-life time in air in the order
of a few hours.
In two ready biodegradation studies according to OECD TG 301D
(GLP, reliability 1) > 60% biodegradation was found after 28 days. In a
Continuous Activated Sludge study > 99.99% removal was observed after 48
days. Chemical analysis confirmed that removal was predominantly by
biodegradation. The studies demonstrate that the substance is readily
biodegradable and almost complete biodegradation occurs in the waste
water in biological wastewater treatment plants.
The substance is expected to have a low bioaccumulation potential
based on the low log Kow. Log Kow is reported as -0.12.
Transport and distribution
The adsorption coefficient (Kd) of the substance has been determined to
be in the range of 377 - 5863 L/kg for three different soils in a test
according to OECD TG 106.
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