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EC number: 266-040-8
CAS number: 65997-04-8
The Rosin adducts and rosin adduct salts
category is a UVCB category and includes rosin or rosin salts that have
been chemically reacted with either fumaric acid or maleic anhydride,
- Rosin, maleated
- Rosin, fumarated
- Resin acids and rosin acids, maleated
- Resin acids and rosin acids, maleated
Resin acids are the predominant components
of rosin (>85%). Resin acids are composed of three skeletal classes of
tricyclic carboxylic acids which share similar structures, but vary in
the position of the double bonds and methyl groups.
As substances in this category are UVCBs,
the proportion of the different resin acids will vary between substances
and between samples of the same substance. However, biodegradation
potential of different resin acids is similar and therefore this
variation is not considered to affect biodegradation potential. The
presence of a metal cation will not alter the structure of the organic
component of the molecule, and therefore will not impact on the
biodegradation potential. Although differences in ecotoxicity have been
observed between maleated and fumarated substances within the category,
the structural differences between maleated and fumarated category
members are not considered to affect biodegradation potential and it is
considered to be appropriate to read across biodegradation data between
all members of the category.
Biodegradation data are available for both
maleated and fumarated members of the category and results from all
studies indicate that the substances are not readily biodegradable. The
similarity of results between maleated and fumarated substances supports
the use of read across between category members for this endpoint.
Bioaccumulation studies have not been
conducted for any category member due to the analytical difficulties
with conducting such a study with UVCB substances containing
constituents with differing, and often low, solubility. However,
literature data are available for individual resin acids. Rosin, the
starting material for preparing rosin adduct substances, is made up of
resin acids and therefore data on the individual resin acids provides an
indication of the bioaccumulation potential of rosin adduct substances.
Resin acids have been shown not to bioaccumulate and it is therefore
considered likely that rosin adduct substances will also not
A hydrolysis study has not been conducted
for any category member. Conducting a hydrolysis study would be
incredibly challenging analytically due to the nature of the substances
as they contain many constituents, many of which are poorly soluble.
to the UVCB nature of the substances, adsorption / desorption is also
difficult to assess experimentally. However, calculated Koc values have
been determined for category members and these range from log Koc 1.315
– 6.256. The range in values is considered to be due to different
constituents within the UVCB having different adsorption potential.
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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