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Ecotoxicological information

Short-term toxicity to fish

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Description of key information

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.  

Key value for chemical safety assessment

LC50 for freshwater fish:
100 µg/L

Additional information

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.