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Ecotoxicological information

Toxicity to microorganisms

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Reference
Endpoint:
activated sludge respiration inhibition testing
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:
3 h
Dose descriptor:
NOEC
Effect conc.:
>= 1 000 mg/L
Nominal / measured:
nominal
Conc. based on:
test mat.
Basis for effect:
inhibition of total respiration
Remarks:
respiration rate
Validity criteria fulfilled:
yes
Conclusions:
Available data from 1-Octadecanol, phosphate, potassium salt were used to evaluate toxicity to microorganisms for Phosphoric acid, C12-18-alkyl esters, potassium salts.
The toxicity to microorganisms of the read-across substance 1-Octadecanol, phosphate, potassium salt was tested in a study according to OECD guideline 209 using activated sludge from a domestic sewage treatment plant as inocumlum.
No significant inhibition was observed at the highest test concentration of 1000 mg/L 1-Octadecanol, phosphate, potassium salt.

3h NOEC ≥ 1000 mg/L
3h EC20 > 1000 mg/L
3h EC50 > 1000 mg/L

Description of key information

A 3h-NOEC of > 1000 mg/L for toxicity to microorganisms was determined for Phosphoric acid, C12-18 alkyl esters, potassium salts based on read-across information.

Key value for chemical safety assessment

EC50 for microorganisms:
1 000 mg/L
EC10 or NOEC for microorganisms:
1 000 mg/L

Additional information

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

The toxicity to microorganisms of the read-across substance 1-Octadecanol, phosphate, potassium salt was tested in a study according to OECD guideline 209 using activated sludge from a domestic sewage treatment plant as inocumlum.

No significant inhibition was observed at the highest test concentration of 1000 mg/L 1-Octadecanol, phosphate, potassium salt.

3h NOEC ≥ 1000 mg/L

3h EC20 > 1000 mg/L

3h EC50 > 1000 mg/L