Acid Brown 354

Endpoint summary

Description of key information

Short-term toxicity to aquatic invertebrates:

EC50 (Daphnia magna, 48 h) = 81.3 mg/l (nominal)

Toxicity to aquatic plant other than algae:

ErC50 (Lemna minor, 7d) > 114.97 mg/l (geom. mean of measured conc.)

Additional information

Invertebrate short-term toxicity

The effect of the product on the capacity for movement of Daphnia magna was evaluated, according to the method C.2 of Directive of the Commission of European Communities of 31st July 1992 (92/69/EEC). In the course of the main study, 5 concentrations of the test substance were tested which caused immobilisation ranging from 10 % of the animals at a concentration of 25 mg/l up to 100 % of the animals at a concentration of 400 mg/l. In the control groups the percentage of animals immobilised was 0 %. No analytical verification of the tested concentrations was performed and therefore the results are based on the nominal concentrations.

Aquatic plant other than algae toxicity

The acute toxicity of the test item to aquatic plants was investigated in a 7–day static test to Lemna minor, according to the OECD Guideline 221 (2006). The study was performed using 5 nominal concentrations ranging from 1.0 to 100 mg/l. The frond number and the dry mass of each replicate were determined. Subsequently, Growth rate µ and the yield were determined from these parameters. As the deviation of the measured concentrations was greater than 20 % of the nominal concentration, the biological results were based on the geometric mean of the measured concentrations. All the validity criteria were met.

Justification for classification or non-classification

According to the CLP Regulation (EC) n. 1272/2008, Part 4: Environmental Hazards, the substances can be classified for hazardous to the aquatic environment when the following criteria are met:

A )Short-term aquatic hazard:

Category Acute 1: 96 hr LC 50 (for fish) and/or 48 hr EC 50 (for crustacea) and/or 72 or 96 hr ErC 50 (for algae or other aquatic plants) ≤ 1 mg/l.

B) Long-term aquatic hazard (iii) Substances for which adequate chronic toxicity data are not available and the substance is not rapidly degradable and/or the experimentally determined BCF ≥ 500 (or, if absent, the log K ow ≥ 4).

Category Chronic 1: 96 hr LC 50 (for fish) and/or 48 hr EC 50 (for crustacea) and/or 72 or 96 hr ErC 50 (for algae or other aquatic plants) ≤ 1 mg/l

Category Chronic 2: 96 hr LC 50 (for fish) and/or 48 hr EC 50 (for crustacea) and/or 72 or 96 hr ErC 50 (for algae or other aquatic plants)> 1 to ≤10 mg/l

Category Chronic 3:96 hr LC 50 (for fish) and/or 48 hr EC 50 (for crustacea) and/or 72 or 96 hr ErC 50 (for algae or other aquatic plants) > 10 to ≤ 100 mg/l.

 

The substance is not rapidly degradable and the available acute toxicity tests to Daphnia magna fixed the effect level that meets the criteria related to the hazard Category Chronic 3 (> 10 to ≤ 100 mg/l). Therefore, the substance is classified as Aquatic Chronic 3 according to the CLP Regulation (EC) no. 1272/2008.