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Ecotoxicological information

Short-term toxicity to fish

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Description of key information

No effects were seen at the highest concentration tested, 1000 mg/L for rosin, fumarated.
The EL50 for resin acids and rosin acids, maleated, calcium salts was determined to be > 100 mg/L.
The EC50 for resin acids and rosin acids, maleated, sodium salts was determined to be 4.8 mg/L.
The LL50 for rosin, maleated was determined to be 9.3 mg/L.

Key value for chemical safety assessment

Additional information

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 fish data are available for all category members, and the results are outlined below.

Rosin fumarated

A GLP-compliant study following OECD 203 is available for Rosin, fumarated, using the test speciesPimaphales promelas(Inveresk Research, 2002). The study used WAFs, with no analytical verification of test concentrations. The EL50 was >1000 mg/L.

Rosin maleated

A GLP-compliant study is available for Rosin, maleated following OECD guideline 203 and using the test speciesOnchorhynchus mykiss(Harlan Laboratories, 2014). The study used WAFs and there was analytical verification of test concentrations. The LL50 was 9.3 mg/L.

Resin acids and rosin acids, maleated sodium salts

A GLP-compliant study following OECD guideline 203 is available for resin acids and rosin acids, maleated, sodium salts with Danio rerio (Laus, 2013), using test solutions prepared as WAFs. The test item was supplied as a 50% aqueous solution but results are reported based on geometric mean measured concentrations of resin acids and rosin acids, maleated sodium salts. The EC50 for resin acids and rosin acids, maleated, sodium salts was 4.8 mg/L, based on measured test concentrations.

Resin acids and rosin acids, maleated calcium salts

A GLP-compliant study following OECD guideline 203 is available for resin acids and rosin acids, maleated, calcium salts with Danio rerio (Laus, 2013) using test solutions prepared as WAFs. Measured concentrations, based on DOC, were in the range of the controls and therefore results are reported as nominal loading rates. The EL50 for resin acids and rosin acids, maleated, calcium salts was >100 mg/L WAF.