Registration Dossier
Registration Dossier
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EC number: 941-237-8 | CAS number: -
Toxicity to aquatic algae and cyanobacteria
Administrative data
Link to relevant study record(s)
Description of key information
The reported key value has been obtained on ammonium chloride, the main salt constituting the reaction mass. Both for fresh water as well as marine water an EC50 was derived although for both the exposure duration was longer than according to guidelines.
Key value for chemical safety assessment
- EC50 for freshwater algae:
- 1 300 mg/L
- EC50 for marine water algae:
- 90.4 mg/L
- EC10 or NOEC for marine water algae:
- 26.8 mg/L
Additional information
The registered substance has not been tested for toxicity to aquatic algae and cyanobacteria and, as a result, it is proposed to provide an assessment based on data read-acrossed from its main constituents. The registered substance is an inorganic reaction mass consisting of water as well as chloride, carbonate and bicarbonate salts of ammonium and sodium. Those salts are well-known substances and relevant peer-reviewed published data are available to characterize their ecotoxicological properties.
Two studies pertaining to toxicity to aquatic algae and cyanobacteria are available on ammonium chloride, the main salt constituting the reaction mass. In a marine species study with diatoms a 10 day EC50 of 90.4 mg/L was derived with a NOEC (10 -d) of 26.8 mg/L. Although these are based on a 10 day exposure period, the test result was used. In a static fresh water species study with chorella vulgaris a 5 day EC50 of 1300 mg/L was derived based on exposure to ammonium carboante. Although these are based on a 5 day exposure period, the test result was used.
Based on available peer-reviewed published data, the other salts constituting the reaction mass can be considered to be not harmful to aquatic algae and cyanobacteria. Considering the whole constituents of the reaction mass as well as their relative proportions in the latter, the reaction mass can be regarded as not harmful to aquatic algae and cyanobacteria.
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