Registration Dossier

Environmental fate & pathways

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Administrative data

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Additional information

Above pH 5.5, virtually all acetylsalicylic acid will exist as the acetylsalicylate ion. Anions generally do not adsorb to particulate matter as strongly as their neutral counterparts and therefore, adsorption of acetylsalicylic acid is not expected to be an important environmental fate process. Moreover, the logKow of 1.19 lets not predict adsorption on particulate matters. This is confirmed by a MacKay Level I calculation that gives a distribution of more than 98 % is water compartment, around 1 % in soil and less than 1 % in air.