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Short-term toxicity to aquatic invertebrates

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Description of key information

2EHDPP is a  “poorly soluble” substance with tendency to stay undissolved when its concentration exceed the water solubility value. Effects observed in the presence of undissolved test material are not indicative of true toxicity but rather indicates physical effects. 

Key value for chemical safety assessment

Additional information

The available studies on the short-term toxicity to invertebrates of 2EHDPP are listed in the table below:

Table 2. Aquatic toxicity data for S141.

ACUTE STUDIES

 

 

 

 

Invertebrate  

Result

Comment

Reference

Klismish

Water flea

Daphnia magna  

48-h EC50: 0.38 mg/L

Effects only observed at concentrations ≥solubility

LeBlanc and Cary (1979)

Supp-K3

Water flea

Daphnia magna  

48-h EC50: 0.15 mg/L

Effects only observed at concentrations ≥solubility

Wilson and LeBlanc (1979)

 

Midge

Chironomus tentans  

48-h LC50: 0.67 mg/L

Effects only observed at concentrations >solubility

Calvert et al. (1982a)

Supp-K3

Midge

Paratanytarsus parthenogenetica  

48-h LC50: 0.50 mg/L

Effects only observed at concentrations ≥solubility

Renaudette et al. (1982)

Supp-K3

As all measured toxicity values are well above the water solubility (50.6 ug/l) of the substance, 2EHDPP can not be classified as toxic to the environment.