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Ecotoxicological information

Toxicity to aquatic algae and cyanobacteria

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Description of key information

The effect of HMX to Algae was assessed under static conditions in two freshwater static algae assays. One was a bottle test with four species of algae, the other was a microplate-based bioassay. The 96h EC50 of test substance to Scenedesmus capricornutum is > 22 μmol/L (6.5 mg/L)  (Biotechnology Research Institute, 1997). The 96h-EC50 of the test substance to algae (Microcystis aeruginosa, Anabeana flos-aquae, Selenastrum capricornutum and Navicula pelliculosa) was greater than 32 mg/L (nominal concentration) (EG & G Bionomics, 1978).

Key value for chemical safety assessment

EC50 for freshwater algae:
6.515 mg/L

Additional information

Both studies were performed at the limit of solubility of HMX.