Tetrasodium [μ-[3-[[2-amino-5-hydroxy-6-[(2-hydroxy-5-nitro-3-sulphophenyl)azo]-7-sulpho-1-naphthyl]azo]-2-hydroxy-5-sulphobenzoato(8-)]]dichromate(4-)

Short-term toxicity to aquatic invertebrates

Description of key information

 

The toxic effect of the test item to Daphnia magna was assessed in a 48 h static test according to OECD guideline 202. A full dose response study - 100, 45.5, 20.7, 9.4 and 4.3 mg/L test item – was performed. The study encompassed 6 treatment groups (5 dose rates and a control) each containing 20 individuals. The mobility of the Daphnia was determined by visual observation after 24 and 48 hours.

After 48 hours of exposure no immobilisation of the test animals was observed in the control and up to and including the test item concentration of 45.5 mg/L. At 100 mg test item/L two animals were immobile. Based on the test results the following dose descriptors were laid down:

 

EC50 (48 h) > 100 mg/L

NOEC (48) ≥100 mg/L