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Ecotoxicological information

Toxicity to aquatic algae and cyanobacteria

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Link to relevant study record(s)

Description of key information

One reliable (Klimisch 1) toxicity study for aquatic algae was available for Alchisor CAL 123.  The toxicity of Alchisor CAL 123 to Pseudokirchnerella subcapitata was reported by Porch & Krueger (2010) in an OECD 201 guideline and GLP compliant study.  Algae was exposed to toxicant in measured concentrations for 72 hours, resulting in a 72-hr LC50 of 35 mg/L, based on cell density and yield.  The 72-hr NOEC, based on growth rate, was 25 mg/L.  

Key value for chemical safety assessment

EC50 for freshwater algae:
35 mg/L
EC10 or NOEC for freshwater algae:
25 mg/L

Additional information

The toxicity of Alchisor CAL 123, characterized as Alkenes, C11-12, hydroformylation products, distillation residues, to aquatic algae and bacteria has been evaluated for this dossier. One reliable (Klimisch 1) toxicity study for aquatic algae was available for Alchisor CAL 123. The toxicity of Alchisor CAL 123 to Pseudokirchnerella subcapitata was reported by Porch & Krueger (2010) in an OECD 201 guideline and GLP compliant study. Algae was exposed to toxicant in measured concentrations for 72 hours, resulting in a 72-hr LC50 of 35 mg/L, based on cell density and yield. The 72-hr NOEC, based on growth rate, was 25 mg/L.  This reliable study result is designated as Key for the toxicity to aquatic algae endpoint.