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EC number: 256-032-2
CAS number: 42978-66-5
No data on biodegradation in soil are available.
to Regulation (EC) 1907/2006, Annex IX, Section 188.8.131.52, column 2, soil
simulation testing does not need to be conducted if the substance is
readily biodegradable. TPGDA and all of the constituents of the
registration item are predicted to sufficiently degrade in the
environment (Cray Valley, rep. no.: 638/004, 1997). Additionally, no one
out of the four main ingredients is considered to persist in the
environment, neither in sediment, soil or water (IUCLID Ch. 5.2.1).
Moreover, based on modeled data relevant degradation products present in
concentration of ≥ 0.1% (equivalent to quantity setting in OASIS
CATALOGIC: ≥0.001 [mol/mol parent]) do neither fulfill the PBT criteria
(not PBT) nor the vPvB criteria (not vPvB).
remaining “non-specified constituents” sum up to a typical concentration
of approximately 6.0 % (w/w). According to GC analytics, more than 45
peaks contribute to this part of the composition of the registration
item. Though it is virtually not possible to identify each single peak
and assess the respective substance(s) individually, a generic
assessment of the environmentally relevant properties of these
ingredients may be applied. Multifunctional acrylates are synthesized
from alcohols and acrylic acid. As a consequence, the resulting products
– including the “non-specified constituents” – are made of the same,
similar chemistry. As shown by the evidence provided above, this
chemistry basically is subject to ultimate biotic degradation: in none
of the four main constituents, a potential metabolite that may be
generated from the degradation of these compounds was identified.
Therefore, from a scientific perspective, it is extremely likely that
also the degradation of the chemically similar “non-specified
constituents” of the registration item will not lead to the formation of
a persistent metabolite. The raw materials used as well as the
conditions of the reaction chosen during manufacture are targeted to
acrylate. Side-products beyond the main constituents discussed above are
expected to slightly vary in chain lengths and/or branching, but are not
anticipated to significantly differ in terms of structural elements – if
at all. Therefore, also these structures are deemed degradable by the
same metabolic pathways. Consequently, there is no concern that (part
of) the UVCB may persist in the environment. Moreover, direct exposure
of the soil compartment is unlikely and because of the hydrophilic
character and the lacking of adsorptive properties a binding of TPGDA on
the solid soil phase is negligible. Hence, TPGDA will preferentially
distribute into the compartment water (IUCLID Ch. 5.4.3). It
could be shown that TPGDA is partly biodegradable in water (cf. 5.2.1).
The structural related acrylate DPGDA, which differs only in a slightly
shorter chain length is readily biodegradable (IUCLID Ch. 5.2.1). In
Analogy to DPGDA it can be expected that TPGDA is ultimately
biodegradable under environmental conditions. Therefore, no simulation
tests on biodegradation of TPGDA are provided.
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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