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EC number: 232-476-2
CAS number: 8050-15-5
Rosin ester substances are UVCB
substances made up of constituents with different properties, which will
behave differently when released to the environment. The PBT assessment
of rosin ester substances therefore considers the PBT potential of each
of the constituents, rather than the substance as a whole.
Rosin ester substances consist of
esters of rosin, and non-esterified resin acids. The rosin esters can be
mono-, di-, tri- or tetra-esters depending on the alcohol and the
production process. Methanol
can form mono-esters, ethylene glycol, diethylene glycol and triethylene
glycol can form mono- and di-esters, glycerol can form mono-, di- and
tri-esters and pentaerythritol can form mono-, di-, tri- and
tetra-esters. In each case, the esterification reaction results in a
UVCB containing esters with varying numbers of ester bonds, formed by
the reaction of the various resin acids with the alcohol. In addition,
non-esterified resin acids will also remain as constituents in the UVCB.
the substances contain too many constituents to assess each one
individually, representative structures have been assessed in order to
screen the potential for persistence and bioaccumulation of
different fractions within the UVCBs. Based on the results of the QSAR
screening assessment, di, tri and tetra esters are not considered to be
bioaccumulative and are therefore not PBT / vPvB. Free resin acids
within the UVCBs are not considered to be persistent or bioaccumulative
based on measured data, and are therefore not PBT / vPvB. Some
mono-ester constituents exceed the screening criterion for
bioaccumulation based on QSAR predictions, and biodegradation
predictions are borderline for persistence. As the QSAR results show
some uncertainty, directready
biodegradation testing of the mono-ester fraction is currently ongoing
to clarify the persistence assessment for these constituents. This
testing was requested in Final Decision letters received from ECHA on 9
February 2017 for the category members resin acids and rosin acids,
hydrogenated, esters with glycerol and resin acids and rosin acids,
hydrogenated, esters with pentaerythritol.
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.Reproduction or further distribution of this information may be subject to copyright protection. Use of the information without obtaining the permission from the owner(s) of the respective information might violate the rights of the owner.
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