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Environmental fate & pathways

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Titanium tetra(octanolate), branched and linear is hydrolytically unstable (half-life < 10 minutes) and the organic degradation product (octyl alcohol isomers; Exxal 8; alcohols, C7-9-iso, C8-rich) decomposes rapidly. Therefore, the adsorption coefficient is relevant for the main degradation product, and the estimated Koc value of 32.2 L/kg is used in CSA. The Koc value of Exxal 8 (alcohols, C7-9-iso, C8-rich) is estimated by using KOCWIN v.2 (US EPA. 2012, Estimation Programs Interface Suite™ for Microsoft® Windows, v 4.10) .

The Henry's Law constant of 0.26 Pa m3/mol at 20 degrees C for Exxal 8 (alcohols, C7-9-iso, C8-rich) indicates that volatilization from water is expected to occur at a slow rate. The Mackay Level III equilibrium model estimates that the decomposition product (alcohols, C7 -9 -iso, C8 -rich) of the target substance will partition largely to the water compartment (approximately 96.6%), followed by the partition to sediment (approximately 3.3%), soil (approximately 0.03%), and air (0.03%) compartments.

The other degradation product (hydrated titanium dioxide) of the target substance is not relevant to be further considered in CSA as it is a solid inorganic percipitate released from the substance after hydrolysis. It is a non-classified substance having low toxicity to human health and the environment. This decomposition product is insoluble in water and therefore lacking bioavailability. According to the report of International Programme on Chemical Safety, titanium is also poorly absorbed and retained by both animals and plants (WHO 1982).

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