Registration Dossier
Registration Dossier
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EC number: 939-600-0 | CAS number: 1471316-27-4
Toxicity to microorganisms
Administrative data
Link to relevant study record(s)
Description of key information
EC50 (3h) = 140 mg/L for activated sludge
EC50 (16.9h) > 10 g for Pseudomonas putida
Key value for chemical safety assessment
- EC50 for microorganisms:
- 140 mg/L
Additional information
For Alcohols, C16-18 (even numbered) and C18 unsaturated, propoxylated, < 2.5 PO (CAS 70955-07-6) one respiration inhibition study with Pseudomonas putida according to German national standard guideline (draft DIN 38412, part 27) is available. After 30 minutes of exposure no impact on the respiration of the microorganisms was measured up to the highest test concentration of 10000 mg/L. Two studies with similar substances (alcohol ethoxylates C12, 4 EO, CAS 9002-92-0 and C12-14, 6 EO, CAS 68439-50-9) confirm this result. In a study according to DIN 38412, part 8 and GLP an EC50 > 10 g/L is reported, after 16.9 hours exposure of Pseudomonas putida to alcohol ethoxylates (C12, 4 EO, CAS 9002-92-0) (Diefenbach, 1996). Furthermore a respiration test with domestic activated sludge according to EG-guideline 88/302/EG and GLP is available for alcohol ethoxylates (C12-14, 6 EO, CAS 68439-50-9) (Diefenbach, 1997). In this study an EC50 (3h) of 140 mg/L was determined.
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