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EC number: -
CAS number: -
OECD 201, GLP and Klimisch 1 algal inhibition 72 hour ErC50 2.43 mg/L, NOEC 1 mg/L.
The study was conducted under static conditions with an initial cell
density of 5089 cells/mL. Five concentration levels were tested in a
geometrical series with a dilution factor of 2 (nominal): 0.50, 1.0,
2.0, 4.0 and 8.0 mg/L. Three replicates were tested for each
concentration level and six replicates for the control. Environmental
conditions (pH, light intensity and room temperature) were determined to
be within the acceptable limits.
OLEIC_DimerFA_TETA_PAA has low water solubility and may sorb to organic
and inorganic materials by different mechanisms. Due to these properties
the test item was difficult to test in artificial water (e.g. sorption
to the test organism and walls of the test vessel). Natural river water
contains particulate as well as dissolved organic carbon to which the
test item can sorb partially preventing that the test item settles onto
surfaces. The sorbed fraction of the test item was difficult to extract
from the test system which normally leads to low analytical recoveries.
Nevertheless the test item was present in the test system and therefore
available for exposure (dissolved in water and sorbed).
No determinations of the test item concentrations were carried out.
Preliminary investigations including the use of different analytical
techniques have shown that no specific method was available that met the
required sensitivity in the range of the test concentrations.
All effect levels are given based on nominal concentrations
The 72 h ErC50 of OLEIC_DimerFA_TETA_PAA to the freshwater green alga Pseudokirchneriella
subcapitata was 2.43 mg/L (95% confidence limits of 2.25 – 2.85
mg/L) and the corresponding NOEC was 1.0 mg/L.
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