Registration Dossier

Environmental fate & pathways

Endpoint summary

Administrative data

Description of key information

Additional information

Adsorption/desorption

Boyd (1982) has been selected as key study and reported a measured Koc of 40 ina clay loam soil. Poole and Poole(1999) calculated a Koc of 36.3, which is consistent with the experimental one. Based on these results, guaiacol is not expected to have a high adsorptive behaviour.

Volatilisation

Volatilisation either from soil or water is not expected to be an important process for guaiacol because of relatively low vapour pressure (14Pa at 25°C), relatively high water solubility (18.5 g/l) and an experimental Henry's law constant of 0.11Pa.m3/mole at25°C.

Distribution modelling

Necessary data to run MacKay were available (Molar mass = 124.14 g/mol; Water solubility =18500g/m3; Vapour pressure = 14 Pa; Log Kow =1.47; Melting point =28°C). According to MacKay level I version3.00, Guaiacol has the following distribution:

-Water: 96.35%

- Air: 1.83%

- Soil: 1.78%