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Ecotoxicological information

Toxicity to aquatic algae and cyanobacteria

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Description of key information

Acutely toxic to aquatic algae.

Key value for chemical safety assessment

Additional information

(2-hydroxyethyl)ammonium nitrate is soluble in water and dissociates to (2 -hydroxyethyl)ammonium and nitrate.

Since no studies on the aquatic toxicity of the substance (2 -hydroxyethyl)ammonium nitrate are available, study reports and published literature about the toxic effects of its dissociation products have been consulted alternatively.

There are two studies available on the toxicity of 2 -aminoethanol (CAS 141-43-5) to aquatic algae (Scenedesmus subspicatus and Selenastrum capricornutum) with EC50 values from 2.8 - 22 mg/L (growth rate). Corresponding NOECs were determined to be in the range of 1 to 4 mg/L.

Based on a reliable guideline study with potassium nitrate (CAS 7757-79-1), it was shown that the substance was not at all or only slightly inhibitory at the highest concentration tested. After an exposure period of 10 days, an EC50 of 1043 mg/L nitrate was derived from testing with 10 different cultures of benthic diatoms.