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Long-term toxicity to aquatic invertebrates

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Description of key information

Read-across from a Daphnia magna reproduction study performed with the Monosodium salt of cyanuric acid NOEC (21d)= 183.4 mg/L.    

Key value for chemical safety assessment

EC10, LC10 or NOEC for freshwater invertebrates:
183.4 mg/L

Additional information

Read-across:

1. Based on the experimental results obtained with the analogue monosodium salt of cyanuric acid, monohydrate in Daphnia magna (21 d-EC50 = 2600 mg/L, basis for effect: immobilisation; 21 d-EC50 = 2800 mg/L, basis for effect: reproduction; 21 d-LOEC = 500 mg/L, basis for effect: mortality and reproduction; 21 d-NOEC = 160 mg/L, basis for effect: mortality and reproduction) and the molecular weights, the read-across approach is applied and the 21 d-EC50, 21 d-LOEC and 21 d-NOEC for substance trisodium cyanurate are calculated to be 21 d-EC50 = 2981.1 mg/L, basis for effect: immobilisation; 21 d-EC50 = 3210.4 mg/L, basis for effect: reproduction; 21 d-LOEC = 573.2 mg/L, basis for effect: mortality and reproduction; 21 d-NOEC = 183.4 mg/L, basis for effect: mortality and reproduction.

2. Based on the experimental results obtained with the analogue cyanuric acid in Dreissena polymorpha pallas ((LC50 1000 and 2000 mg/L > 1 month for raw cyanuric acid and LT50 1000 and 2000 mg/L ≤ 17 days for pure cyanuric acid) and the molecular weights, the read-across approach is applied and the same values for substance trisodium cyanurate can be extrapolated.