Registration Dossier
Registration Dossier
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EC number: 938-702-2 | CAS number: -
Toxicity to aquatic algae and cyanobacteria
Administrative data
Link to relevant study record(s)
Description of key information
One reliable (Klimisch 1) toxicity study for aquatic algae was available for Cyclohexanol, 4-C11-12-alkyl, branched. The toxicity of Cyclohexanol, 4-C11-12-alkyl, branched to freshwater green alga Pseudokirchneriella subcapitata was reported by Arnie et al., (2012) in a GLP compiant OECD 201 guideline and EPA OCSPP 850.4500 study. Algae were exposed to the test substance in nominal concentrations based on WAF loading rates for 96 hours, resulting in a 72-hr ErL50 of >100 mg/L.
Key value for chemical safety assessment
- EC50 for freshwater algae:
- 100 mg/L
- EC10 or NOEC for freshwater algae:
- 50 mg/L
Additional information
One reliable (Klimisch 1) toxicity study for aquatic algae was available for Cyclohexanol, 4-C11-12-alkyl, branched. The toxicity of Cyclohexanol, 4-C11-12-alkyl, branched to freshwater alga Preudokirchneriella subcapitata was reported by Arnie et al., (2012) in a GLP compliant OECD 201 guideline and EPA OCSPP 850.4500 study. Algae were exposed to the test substance in nominal concentrations based on WAF loading rates for 96 hours, resulting in a 72-hr ErL50 of >100 mg/L.
The toxicity of Cyclohexanol, 4 -C11 -12 -alkyl, branched to the fresh water green alga Pseudokirchneriella subcapitata over a 96 -hour exposure period was tested according to the OECD Guidelines for Testing of Chemicals, Guideline 201: "Freshwater Alga and Cyanobacteria, Growth Inhibition Test", adopted 23 March 2006. The fresh water green alga Pseudokirchneriella subcapitata, was exposed for 96 hours under static conditions to five nominal water accommodated fraction (WAF) loading rates of Cyclohexanol, 4-C11-12-alkyl, branched, ranging from 6.3 to 100 mg/L. Effects were evaluated based on yield and growth rate. The 72-hours EyL50 and ErL50 values were > 100 mg/L. The 72-hour NOELR, based on effects on growth rate was 50 mg/L.
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