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EC number: 266-040-8
CAS number: 65997-04-8
The EL50 is determined to be >100 mg/L for
The EL50 for resin acids and rosin acids, maleated, calcium salts is
determined to be >100 mg/L.
The EC50 for rosin maleated is determined to be 16 - 22 mg/L.
The EC50 for resin acids and rosin acids, maleated, sodium salts is 17
Differences in ecotoxicity have been observed between fumarated and
maleated category members. For this reason, read across between
fumarated and maleated substances is not used for ecotoxicity endpoints.
For fumarated substances, ecotoxicity endpoints and environmental
classification are assessed based on data for the substance itself,
where available, or based on read across from another fumarated rosin
substance. One set of PNECs has been derived to cover all fumarated
rosin substances, based on the most sensitive ecotoxicity result
available for any fumarated rosin substance.
The ecotoxicity of maleated substances is affected by the solubility of
the test item, with more soluble substances rosin, maleated and resin
acids and rosin acids, maleated sodium salts showing higher aquatic
toxicity compared to the poorly soluble substance resin acids and rosin
acids, maleated calcium salts. Therefore, ecotoxicity endpoints and
environmental classification of resin acids and rosin acids, maleated
calcium salts are completed based on data for the substance itself
rather than using read across from more soluble maleated substances.
However, PNECs have been derived based on pooled data, with one set of
PNECs derived to cover all maleated substances within the category. The
most sensitive result for any maleated rosin substance has been used as
the key value for PNEC derivation.
Acute Daphnia data are available for all category members, and
the results are outlined below.
Two studies are available for rosin, fumarated. Laus (2013) followed
OECD guideline 202 and was GLP-compliant. Test concentrations were
measured based on DOC, but results were reported based on nominal
loading rates. The EL50 was determined to be >100 mg/L.
Inveresk Research (2002) is a GLP-compliant study following OECD
guideline 202. Test solutions were prepared as WAFs and there was no
analytical verification of the test concentrations. The EL50 was
determined to be >100 mg/L.
A reliable study is also available for rosin, fumarated, reaction
products with formaldehyde (Harlan Laboratories, 2010). Although the
substance is not being registered under REACH it falls within the
category definition and the result is read across to rosin, fumarated.
In an OECD guideline 202 study, the EL50 was determined to be >100 mg/L.
Two reliable studies are available for rosin, maleated. WAFs were used
and analytical monitoring of test concentrations was carried out in both
studies. An EL50 of 22 mg/L was determined in one study (Harlan
Laboratories, 2011) and an EC50 of 16 mg/L was determined in the second
study (Laus, 2013).
Resin acids and rosin acids, maleated sodium salts
A GLP-compliant study following OECD guideline 202 is available for
resin acids and rosin acids, maleated, sodium salts (Laus, 2013). The
study utilised WAF techniques. The EC50 for resin acids and rosin acids,
maleated, sodium salts was determined to be 17 mg/L, based on geometric
mean measured test concentrations.
Resin acids and rosin acids, maleated calcium salts
GLP-compliant study following OECD guideline 202 is available for resin
acids and rosin acids, maleated, calcium salts (Laus, 2013). Test
solutions were prepared as WAFs and as analysis showed measured
concentrations based on DOC to be in the same range as the controls the
results were based on nominal loadings. The EL50 for resin acids and
rosin acids, maleated, calcium salts was determined to be >100 mg/L.
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