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EC number: 931-295-2
CAS number: -
Read across of the results of a 96 h fish test performed with long chained diamine was performed. This read across is based on the fact that no, or only minor, differences in the results of the acute fish toxicity tests, performed with cat ionic surfactants, has been observed.
The results of the 96 h fish toxicity tests performed with substances
within the primary fatty amines category shows a variation in LC50
between 100 and 1000 µg/L and it seems as the long chained substances in
this category are slightly more toxic. The same narrow variation can be
observed for substances in the diamine category with a variation of LC
50 between 100 and 500 µg/L. Moreover also for the diamines it seems as
the short term toxicity to fish for the long chained diamines are
slightly higher then for the short chained diamines. Also for the
substances in the poly amine category the variation of the LC50 is in
the same range between 100 and 500 µg/L, the substance with the lowest
toxicity is the short chained branched triamine. All in all there are,
in these three categories primary fatty amines, diamines and polyamines,
approximately 15 toxicity tests performed with fish available and the
LC50s are all in the same range 100 µg/L to 1000 µg/L. To be able to
determine if there is a significant difference in toxicity between long
chained diamine and etherdiamine the results from the long term toxicity
to aquatic organisms, daphnia and algae, was compared. The NOEC
determined in the 21 d daphnia test was 90 µg/L for etherdiamines and
100 µg/L for diamines, and for algae the EC10 was 184 µg/L for
etherdiamines and 188 µg/L for diamines. It can be concluded that no
difference in toxicity to aquatic organisms between etherdiamine and
diamine can be observed in long term test, which supports the read
across from diamine to etherdiamine. Moreover, there are data in the
open litterature that states that the LC50 of etherdiamine in a 96 hour
fish tests has been determined to between 100 and 300 µg/L. These
sources are considered not to be reliable enough for using as a
reference, but together with the data for other cationic categories
there is a weight of evidence that the LC50 is above 100 µg/L.
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