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EC number: 614-523-2
CAS number: 68475-37-6
The category of
Rosin Esters consists of rosin which has been esterified with alcohols,
typically methanol, ethylene glycol, diethylene glycol, triethylene
glycol, glycerol and pentaerythritol. Resin acids are the predominant
components of rosin (>85%). Resin acids are composed of three skeletal
classes of tricyclic carboxylic acids which share similar structure, but
vary in the position of the double bonds and methyl groups. Hydrogenated
rosin is implicitly included in the definition of rosin as
disproportionated rosin which is a combination of hydrogenated and
dehydrogenated rosin naturally produced when rosin is heated. The
category therefore also includes the hydrogenated rosin forms of these
to the reactivity of resin acids, dimers can be formed. These rosin
dimers are also known as oligomers or by the trivial name of polymerised
As each member of
this category is a UVCB, the resin acid components will vary in type and
The number of
ester bonds that can be formed is driven by the alcohol. 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.
studies are available for category members, following OECD Testing
Guideline 301B ready biodegradation screening study. None of the studies
showed a level of biodegradation greater than 60% within 28 days of
treatment under the conditions of the study. Ready biodegradation is not
observed for any category member. However,
biodegradation studies conducted with UVCB substances are not always
relevant, as individual constituents within a UVCB will have different
the purposes of persistence assessment, a screening assessment has been
conducted assessing the biodegradation potential of constituents within
the UVCB. Based on the results of this screening assessment, direct
ready biodegradation testing is underway to assess the degradation
potential of the mono-ester fraction of rosin ester substances.
accumulation in aquatic organisms is vital for understanding the
environmental behaviour of a substance. Accumulation is a general term
for the net result of absorption (uptake), distribution, metabolism and
excretion (ADME) of a substance in an organism.
ester substances are UVCB substances containing rosin ester and
non-esterified resin acid constituents. The bioaccumulation potential of
the substances is therefore assessed based on a QSAR screening
assessment of rosin ester constituents and measured data for resin
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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