Registration Dossier
Registration Dossier
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EC number: 232-414-4 | CAS number: 8016-81-7 The residue from the distillation of tall oil. It contains primarily high-boiling esters of fatty acids and rosin. It may also contain neutral materials, free fatty acids and rosin acids.
Dissociation constant
Administrative data
Link to relevant study record(s)
Description of key information
The pKa of the acids ionisable constituents of Tall Oil Pitch is predicted using a reliable freely-available method.
Key value for chemical safety assessment
Additional information
No measured data for dissociation constant of Tall Oil Pitch were available. The pKa value (normal conditions) was predicted using SPARC.
While the acids constituents (Fatty and Resin acids) group is ionisable, neutrals constituents such as alcohols are extremely weak acids and only dissociate under strongly basic conditions. In the range of pH usually considered relevant to the human body and environment, i.e. pH 2-9, acid constituents will ionise while the neutrals will be non-ionised. There is no need to conduct further testing.
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