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EC number: 500-148-0
CAS number: 61788-89-4
No acute or chronic effects to algae are expected up to the limit of water solubility (< 0.12 mg/L)
The toxicity of Fatty acids, C18-unsaturated, dimers (CAS No.
61788-89-4) to aquatic green algae, Pseudokirchneriella subcapitata
(formerly Selenastrum capricornutum), was tested with WAFs, under static
conditions (Kelly, 2002). The WAFs were prepared through direct addition
of test substance to medium and stirred for 48h, after which 800 mL of
the WAF was siphoned off for use as a test medium. The EL50 (72 h) and
NOELR (72 h) were both determined as > 1000 mg/L (nominal). The same
result was obtained in a study used for read-across with the category
member Fatty acids, C18-unsaturated, trimers (CAS No. 68937-90-6),
conducted in accordance to ISO 10253 with the marine alga Skeletonema
costatum. No effect up to the limit of the water solubility of the
tested substance (< 0.37 mg/L) was observed and the EL50 (72 h) and
NOELR (72h) are reported as > 1000 mg/L (nominal) (Källqvist, 2004).
Thus, based on the above mentioned results, it can be concluded that
Fatty acids, C18-unsaturated, dimers (CAS No. 61788-89-4) or any other
substance within the category does not show any chronic toxicity to
algae up to the limit of water solubility.
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