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EC number: 259-105-7
CAS number: 54326-11-3
not considered to be acutely toxic to fish, invertebrates or inhibitory
to algal growth as the substance has an acute LL or EL50s of >100 mg/L
(WAF), based on read across from a structural analogue.
literature search identified no ecotoxicological data for (benzoato-O,O')hydroxy(octadecanoato-O,O')aluminium.
As no data
was available for acute
toxicity to fish, invertebrates or inhibitory to algal growth of
(benzoato-O,O')hydroxy(octadecanoato-O,O')aluminium, these endpoints
were read across from aluminum, benzoate C16-18-fatty acids complexes.
benzoate C16-18-fatty acids complexes (CAS
No. 94166-87-7, EC No. 303-385-6) is
considered suitable for read-across to
(benzoato-O,O')hydroxy(octadecanoato-O,O')aluminium as it is
structurally similar being an approximate 2:1 mixture of
(benzoato-O,O')hydroxy(hexadecanoato-O,O')aluminium. The only
significant difference is the presence of about 30% of the aluminium
complex containing the saturated C16-fatty acid, hexadecanoate, in place
of the saturated C18-fatty acid, octadecanoate. This small difference in
composition is expected to have no adverse influence on the acute
toxicity to fish and aquatic invertebrates or algal growth.
of the low aqueous solubility, the
read-across substance was tested as a Water Accommodated Fraction (WAF).
Amounts of test item were added to the surface of the dilutent at the
appropriate loading rate. After the addition of the test item, the media
was stirred by a magnetic stirrer using a stirring rate such that a
vortex was formed to give a dimple at the water surface. The stirring
was stopped after 23 hours and the mixture allowed to stand for 1 hour.
A wide bore glass tube, covered at one end with Nescofilm was submerged
into the vessel, sealed end down, to a depth of approximately 5 cm from
the bottom of the vessel. A length of Tygon tubing was inserted into the
glass tube and pushed through the Nescofilm seal and the WAFs removed by
mid-depth siphoning (the first approximate 75-100 mL discarded) to give
the WAF. Microscopic
inspection of the WAF showed no micro-dispersions or undissolved test
item to be present.
ensuring that media were compatible with the water chemistry
requirements of the test species, the tests on the three taxa were
conducted using water from the same source with similar characteristics.
As the water solubility of the substance is likely to be influenced by
the hardness of the water, the ecotoxicity tests were all conducted in
media with the same hardness, approximately 150 mg/L CaCO3.
As the substance could not be analysed directly, both the aluminium and
the total organic carbon were measured in the exposure media. The
benzoate C16-18-fatty acids complexes to fish
and Daphnia and toxicity to algal growth showed no effects at a
water accommodated fraction nominal loading rate of 100 mg/L. Therefore,
for fish the 96 hour LL50 is > 100 mg/L (WAF), for Daphnia the
48 hour EL50 is >100 mg/L (WAF) and for algal growth inhibition the 72
hour EL50 is >100 mg/L (WAF). The acute toxicity to fish, Daphnia and
toxicity to algal growth were determined in GLP-compliant, limit tests
following OECD guidelines 203, 202 and 201 respectively (Harlan 2013).
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