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Ecotoxicological information

Toxicity to aquatic algae and cyanobacteria

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Link to relevant study record(s)

Reference
Endpoint:
toxicity to aquatic algae and cyanobacteria
Type of information:
read-across from supporting substance (structural analogue or surrogate)
Adequacy of study:
key study
Justification for type of information:
REPORTING FORMAT FOR THE ANALOGUE APPROACH
Refer to attached document
Reason / purpose for cross-reference:
read-across source
Key result
Duration:
72 h
Dose descriptor:
EC50
Effect conc.:
> 100 mg/L
Nominal / measured:
nominal
Conc. based on:
other: water-accomodated fraction (WAF)
Basis for effect:
growth rate
Key result
Duration:
72 h
Dose descriptor:
NOEC
Effect conc.:
>= 100 mg/L
Nominal / measured:
nominal
Conc. based on:
other: water-accomodated fraction (WAF)
Basis for effect:
growth rate
Validity criteria fulfilled:
yes
Conclusions:
Available data from 1-Octadecanol, phosphate, potassium salt were used to evaluate toxicity to algae for Phosphoric acid, C12-18-alkyl esters, potassium salts.
The toxicity of the read-across substance 1-Octadecanol, phosphate, potassium salt on the growth of the fresh water green alga Desmodesmus subspicatus was tested in a study according to OECD guideline 201.
No significant effects were observed up to and including the highest test concentration (WAF of 100 mg/L 1-Octadecanol, phosphate, potassium salt).

Growth rate:
72h-EC50: > 100 mg/L (nominal, WAF)
72h-NOEC:≥100 mg/L (nominal, WAF)

Yield:
72h-EC50: > 100 mg/L (nominal, WAF)
72h-NOEC:≥100 mg/L (nominal, WAF)

Description of key information

An 72h-EC50 of > 100 mg/L (grow, nominal, WAF) and a 72h-NOEC of ≥100 mg/L (grow, nominal, WAF) for toxicity to fresh water green alga Desmodesmus subspicatus were determined based on on read-across information for Phosphoric acid, C12-18 alkyl esters, potassium salts.

Key value for chemical safety assessment

EC50 for freshwater algae:
100 mg/L
EC10 or NOEC for freshwater algae:
100 mg/L

Additional information

Available data from 1-Octadecanol, phosphate, potassium salt were used to evaluate toxicity to algae for Phosphoric acid, C12-18-alkyl esters, potassium salts.

The toxicity of the read-across substance 1-Octadecanol, phosphate, potassium salt on the growth of the fresh water green alga Desmodesmus subspicatus was tested in a study according to OECD guideline 201.

No significant effects were observed up to and including the highest test concentration (WAF of 100 mg/L 1-Octadecanol, phosphate, potassium salt).

Growth rate:

72h-EC50: > 100 mg/L (nominal, WAF)

72h-NOEC:≥100 mg/L (nominal, WAF)

 

Yield:

72h-EC50: > 100 mg/L (nominal, WAF)

72h-NOEC:≥100 mg/L (nominal, WAF)

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