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EC number: 232-304-6
CAS number: 8002-26-4
A complex combination of tall oil rosin and fatty acids derived from acidulation of crude tall oil soap and including that which is further refined. Contains at least 10% rosin.
bioaccumulation of DTO as a whole substance is not scientifically
possible for the purpose of environmental assessment. However, for risk
characterisation, it is necessary to consider the properties of the
individual constituents that determine their environmental fate. As a
consequence, in this section, only data describing the bioaccumulation
of DTO constituents are considered.
per ECHA communication number CCH-D-2114412576-50-01/F dated July 2018 (attached
in Section 13 of the dossier), ECHA has requested the registrant to
submit information on Bioaccumulation in aquatic species (Annex IX,
Section 9.3.2.; test method: Bioaccumulation
in fish: aqueous and dietary exposure, OECD TG 305, aqueous
exposure/dietary exposure) with the block 10 constituents of the
registered substance meeting P and vP criteria. The registrant is
required to submit the requested information in an updated registration
dossier by 18 July 2022.
bioaccumulation of DTO as a whole substance
accordance with Section 1 of REACH Annex XI, the study does not need to
be conducted because the bioaccumulation of a UVCB substance of this
nature should be evaluated on the basis of the properties of its
constituents. A result for the whole substance is not meaningful
scientifically for the purpose of assessment of exposure or risk. It is
therefore not appropriate to conduct or propose a test for this
endpoint. The needs associated with a sound understanding of
bioaccumulation are adequately met by the available data on
constituents. Reliable bioaccumulation data are characterised by
quantitative structure activity relationships (QSARs) for constituents
of the substance.
bioaccumulation of DTO constituents
basis for the Bioconcentration Factor (BCF) prediction is described in
detail in the PBT assessment in Section 8 of the CSR.
are no measured data available for bioaccumulation of individual
constituents of DTO. Bioaccumulation potential was assessed for
individual constituents of DTO using the appropriate QSAR from the TGD.
The values for the individual constituents have been used to determine
weighted averages for the blocks. The methods used to determine the BCF
values are described in PFA (2010b). The resulting values for the blocks
are shown in Table 4.6.
BCF values for DTO constituent blocks
Bioconcentration Factor (BCF)
Low boiling fatty acids
C16 saturated - C18.3 unsaturated fatty acids
C18 saturated - C24 saturated and unsaturated fatty acids
Tetracosanol and dehydrated sterol
Sitosterols and analoque
assessed because they are high polymeric constituents
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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