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EC number: 251-649-3
CAS number: 33704-61-9
- Abiotic degradation:
Air: Based on estimation with the QSAR
model Aopwin, Cashmeran undergoes in air rapid degradation after
reaction with hydroxyl radicals or ozone. The DT50 values after
reaction with hydroxyl radicals and ozone are 1.2 hours and 24
hours respectively.The half-life time of Cashmeran is < 2 days.
Cashmeran will not reach the stratosphere and is therefore not
considered to be a long-range transported chemical in air
Cashmeran does not have an ozone depletion potential
because it does not contain halogens and does not have the
potential to reach the stratosphere (CLP, 2010).
Water: According to REACH Annex XI a study can
be waived when it is not scientifically justified. For Cashmeran a
hydrolysis test is not justified, because it can be reliably
predicted that it is hydrolytically stable. It does not contain
hydrolysable groups in its chemical structure such as esters,
carbamates, epoxides, halomethanes, acylhalides (see Hydrowin,
EpiSuite for all hydrolysable groups). The half-life at 20°C is
therefore expected to be > 1 year.
- Biotic degradation:
In a screening study according to OECD TG 301C no
biodegradation was found after 28 days. This study shows that
Cashmeran is not readily biodegradable under the conditions of
The highest BCF (steady state) in fish
was found to be 140 L/kg ww, corresponding to 157 L/kg ww when
converted to a standard fish lipid content of 5%. Based on this
BCF no bioaccumulation is expected (BCF < 500).
The BCF in earthworms was estimated with the equation from
Jager (1998) to be 191 l/kg ww, indicating that the potential for
bioaccumulation in terrestrial organisms will also be low.
- Transport and
Cashmeran is a moderately lipophilic
substance with log Kow 4.2. The sorption to organic matter Koc is
200. This indicates that the substance will have a
low potential to adsorb to sediment/soil.
To assess the volatilisation potential of the substance a
Henry's law constant was calculated which gave a result of 4.2 Pa.
m3/mol at 25 °C. From the distribution
modelling results it can be concluded that volatilisation is of
minor importance in the environmental behaviour of Cashmeran.
Based on Level III distribution modelling using EPISUITE
(assuming equal and continuous releases to air, water and soil)
using the CAS number 33704 -61 -9 and the measured
physico-chemical parameters as input, it is estimated that the
majority of the substance released to the environment will
partition mainly into soil (85%) and water (14%) with small
amounts to sediment and air (both <1%).
The SimpleTreat model, which is incorporated in EUSES,
simulated the distribution of the substance in a Sewage Treatment
Plant based on vapour pressure, water solubility, log Kow and
biodegradability. The model predicts that 94.2% of the substance
will partition to water, 2.42% to sewage sludge and 3.42% to air
at 15 °C.
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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