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Environmental fate & pathways

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The soil sorption coefficient Koc of tributyl acetylcitrate was determined using the HPLC method (OECD 121, EC C.19). The resulting log Koc was 4.271, i.e. Koc = 18664 L/kg. According to the classification scheme of Blume & Ahlsdorf (1993), tributyl acetylcitrate shows a high (log Kow method) to very high sorption onto soil organic matter.

Henry's Law constant

Henry's Law constant of tributyl acetylcitrate was calculated using EPIWIN (v4.0), HENRYWIN (v3.20). The calculation of Henry's Law constant according to the equation H=vp/ws yielded a value of 4.434 Pa x m³/mole using a measured water solubility of 4.49 mg/L and a vapour pressure of 0.000371 mm Hg. Based on the result, tributyl acetylcitrate can be considered to be moderately volatile from aqueous solution.

Distribution modelling

The environmental distribution of tributyl acetylcitrate was calculated according to Mackay Level I (v3.00). The substance is about equally distributed to air (16.1%); water (10.5%), soil (37.9%) and sediment (35.4%); the distribution to the other compartments (fish, aerosol, suspended particles) is negligible.