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EC number: 220-479-1
CAS number: 2781-00-2
There is no data on
1,4-bis[1-(tert-butylperoxy)-1-methylethyl]benzene. A read across
approach is proposed with 1,3 (or
and sediment compartments
peroxide was evaluated in a study performed in accordance with OECD
testing guideline 111 and EPA OPPTS 835.2110 under GLP requirements.
results from the hydrolysis test indicate that 64.6, 71.4 and 77.3% of
the reaction were observed after 5 days at pH 4, 7 and 9 solutions
respectively, at 50 °C. The test has demonstrated that the substance is
hydrolytically stable at pH 2.6 after 24 hours. The degradation rates
were calculated using first order kinetics as follows:
4 : half-life = 7.9 d
7: half-life = 10.3 d
9: half-life = 13.4 d
values at 25°C, using the Arrhenius equation:
4 : half-life = 56.4 d
7: half-life = 74.7 d
9: half-life = 96.5 d
ready biodegradability of
1,3-bis[1-(tert-butylperoxy)-1-methylethyl]benzene was evaluated in a
study performed in accordance with OECD testing guideline 301 D and GLP
requirements (due to structural analogy, read-across from supporting
substance is considered as valid, thus, results given here may apply to
[1,3(or 1,4)- Phenylenebis(1-methylethylidene)] bis[tert-butyl]
is not biodegraded in the closed bottle test, and therefore should not
be classified as readily biodegradable. This lack of biodegradation is
not due to toxicity of the test compound because the endogenous
respiration is not inhibited by bis (tert-butyl peroxy isopropyl)
and water compartment exposition is likely. Besides, based upon the
adsorption potential of the substance of interest, a study was conducted
to determine the biodegradation of [1,3(or
1,4)-phenylenebis(1-methylethylidene)]bis[1,1-dimethylethyl] peroxide in
water/sediment simulation test, according to US EPA guideline.
substance was not found in the water layers at all time points. In the
sediment layer, an average of 94.7% of the applied dose was detected at
day 0. The substance has decreased to an average of 9.7% of the applied
dose at day 90. The half-life in sediment/water compartment under
anaerobic conditions was determined as 29 days.
the main expected breakdown product, was detected in water and sediment
layers at all time point (except day 0) but below a quantifiable level
until day 90: it represented an average of 61.5% of the test substance
can reach the soil via several routes:
of sewage sludge in agriculture.
peroxides, when released into the sewage of a plant production or of a
downstream’s user plant, are treated with other substances in dedicated
sewage treatment plants. The activated sludge stemmed from these sewage
treatment plants are then extracted and treated as chemical waste
the production plant, the release of organic peroxide into the sewage is
very limited, not to say completely negligible. The waste water from
production plant is usually treated: at least a physical/chemical
treatment, which will neutralize potential residual organic peroxide,
and that can be followed by a biological treatment. So it is expected
that organic peroxides won’t be present in sludge.
the rest of the lifecycle, organic peroxides are mainly used as
cross-linking agent/polymerization initiator for the production of
resins/rubbers/polymers. Based upon the fact that organic peroxides are
totally consumed during the process (>99%) and that those processes are
water-free (so no production of sewage sludge), it is assumed that the
soil is not exposed to organic peroxides via use of sludge.
a consequence, we can assume that soil is not exposed to organic
peroxides via the application of sewage sludge in agriculture.
application of chemicals.
on the uses inventoried for organic peroxides we can consider that there
is no direct application of these substances on the soil compartment.
Hereunder, the relevant Environmental Release Categories (ERC), as
described in guidance R12 (version 2.0, dated 7/11/2010)
from the atmosphere.
from the atmospheric compartment involves volatilization, vaporization
or direct release of a considered substance into the atmosphere. Due to
their dangerous intrinsic physico-chemical properties, organic peroxides
are carefully handle in closed systems and their transport and
production are ruled by several regulations. Based on organic peroxides
uses too, we may assume that deposition on soil from the atmosphere
As exposure of the soil compartment is
unlikely, we don't propose a simulation biodegradation tests in soil.
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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