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Ecotoxicological information

Toxicity to aquatic algae and cyanobacteria

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Link to relevant study record(s)

Description of key information

The effective concentration (EC50) value of 3-chloroaniline in aquatic green algae (Chlorella pyrenoidosa) in a 96 hr study on the basis of growth rate effect was found to be 21 mg/L. But the BCF value of 3-chloroaniline reported was not >= 500 as well as the substance was found to be rapidly degradable.Thus considering only the value from CLP Criteria for aquatic classification of the substance , it is concluded that 3-chloroaniline exhibits toxicity to aquatic algae (Chlorella pyrenoidosa) in category 3.

Key value for chemical safety assessment

EC50 for freshwater algae:
21 mg/L

Additional information

No. of studies were reviewed for toxicity to aquatic algae and cyanobacteria from reliable sources having Klimisch rating 2 and 4.

The summary of the results are presented below  

Sr.No

Endpoint

Effect values

Basis for effects

Duration

Species

Sources

1

EC50

21 mg/L

Growth rate

96 hrs.

Chlorella pyrenoidosa

Experimental data  for CAS : 108-42-9

2

EC50

53 mg/L

Population

48 hrs.

Scenedesmus subspicatus (new name: Desmodesmus subspicatus)

Experimental data from Water Research for CAS : 108-42-9

3

EC50

26 mg/L

Population

48 hrs.

Scenedesmus subspicatus (new name: Desmodesmus subspicatus)

Experimental data from Water Research for CAS : 108-42-9

4

EC50

0.74 mg/L

Population

96 hrs.

Pseudokirchnerella subcapitata

Experimental data from study report for RA CAS : 95-76-1

 

Based on the studies summarized in the above table for the target substance 3-chloroaniline and the read across substance,the endpoint value was found to vary between EC50 = 0.74 mg/L to 53 mg/L in a 48 hrs. to 96 hrs. study on the basis of growth rate and population effect. Based on the EC50 values ranging from 21 mg/L to 53 mg/L,the substance qualify for the aquatic classification in Category 3.But EC50 value of read across substance was found to be 0.74 mg/L which exhibits toxicity in aquatic Acute Category 1.