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Ecotoxicological information

Toxicity to soil macroorganisms except arthropods

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Link to relevant study record(s)

Description of key information

Testing is not scientifically justified as this substance is hydrolytically unstable. The decomposition products have a low potential for aquatic bioaccumulation and a low potential to cross biological membranes. Estimated LC50 value of the major degradation product (octyl alcohol isomers) is used as a key value.

Key value for chemical safety assessment

Short-term EC50 or LC50 for soil macroorganisms:
477 mg/kg soil dw

Additional information

When this substance comes in contact with water or moisture, a complete hydrolysis will take place with no significant reaction products other than Exxal 8 (Alcohols, C7-9-iso, C8-rich) and hydrated titanium dioxide (key study on hydrolysis OECD 111). The organic decomposition product Exxal 8 is readily biodegradable and not persistent or bioaccumulative (low log Kow 3.2 and BCF 15.2 L/kg).

According Cash G et al (1999), the estimated 14 days EC50-value of Exxal 8 to earthworm is 477 mg/kg soil. Based on the weight of evidence approach, this value was considered reliable enough to be used as a key value for CSA as it is obtained from a peer-reviewed secondary source Cash et al (1999) and estimated by using the ECOSAR model in US EPA EPIsuite.

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