Registration Dossier
Registration Dossier
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EC number: 203-532-3 | CAS number: 107-92-6
Adsorption / desorption
Administrative data
Link to relevant study record(s)
Description of key information
The study need not to be conducted as the substance has a low potential for bioaccumulation (log Kow < 3) and is readily biodegradable
The calculated Koc is for the charged molecule is 45.6 at pH 7 (OXEA, 2010).
Key value for chemical safety assessment
Additional information
In accordance with column 2 of REACH Annex IX Nr 9.3.3, the study does not need to be conducted as the substance has a low potential for absorption (log Kow < 3, see Sect. 4.7) and is readily biodegradable (see Sect. 5.2.1).
As additional information, the Koc of butyric acid was estimated to be 45.6 at pH 7 (log Koc at pH 7: 1.66; pH 4: 1.69) using a method by Franco & Trapp (2008) for the estimation of the adsorption coefficient for the charged molecule
. The low Koc indicates high mobility in soil and low potential for absorption.
The results of Hemphill (1962) are not suited to assess the adsorption of butyric acid to soils. The sorbents are pure clay without carbon content and the publication has different weaknesses.
Information on Registered Substances comes from registration dossiers which have been assigned a registration number. The assignment of a registration number does however not guarantee that the information in the dossier is correct or that the dossier is compliant with Regulation (EC) No 1907/2006 (the REACH Regulation). This information has not been reviewed or verified by the Agency or any other authority. The content is subject to change without prior notice.
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