oils, palm, propoxylated

Endpoint summary

Description of key information

The test substance is of very low solubility in water. In a series of reliable ecotoxicity tests across three trophic levels and microorganisms, the test substance is not toxic to aquatic organisms at the limit of solubility.

Two reliable studies were available assessing the acute toxicity of propoxylated palm oil to fish. The recent study by Squance (2018) is Klimisch 1 and comprises a limit test using Oncorhynchus mykiss. The LL50 was determined to be > 100 mg/l WAF nominal loading rate. The NOELR was 100 mg/l WAF. The study by Scholz (1994) exposed Danio rerio to a single concentration of the test item in which no mortality was also observed. The mean test concentration and LC50 was calculated to be > 82 mg/l and a NOEC of 82 mg/l. The key study (Squance, 2018) with a LL50 of >100 mg/l and NOELR of 100 mg/l are taken as the key studies for risk assessment.

One reliable (Klimish 2) study was available on the short term toxicity of propoxylated palm oil to the invertebrate, Daphnia magna over a 48 hour period. After 48 hours, no immobilisation was observed in any of the test concentrations. The NOEC and EC100 of 52.2 and >52.2 mg/L respectively were provided. An EC50 of >52.2 mg/L has been determined from this information.

A reliable (Klimisch 2) study was available which assessed the toxicity of propoxylated palm oil on the algal species, Scenedesmus subspicatus. The 72 hour NOEC was determined at > 49.3 mg/L. Based on this result, a 72 hour EC50 of >49.3mg/L has calculated.

A reliable (Klimish 2) study was available which assessed the toxicity of the test substance to Pseudomonas putida. The EC10 was determined at >2ml/L. No conversion of this to mg/L was possible.