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EC number: 216-653-1
CAS number: 1634-04-4
Comparison with the Criteria of Annex XIII An assessment of the PBT
status of MTBE has been made using all available data.
A closed bottle test (OECD 301D; see Section 18.104.22.168.2) showed that MTBE
is not readily biodegradable; MTBE is therefore identified as being
Whole-body bioconcentration factors (BCF) of 1.5 and 1.4 were reported
for Japanese carp (Cyprinus carpio) exposed for 28 days (see Section
4.3.1). MTBE is therefore not bioaccumulative.
The acute effect concentrations for all three trophic levels are much
higher than the PBT screening criterion of 0.1 mg/l. It can therefore be
expected that MTBE is not potentially toxic towards aquatic organisms.
The chronic effect concentrations for invertebrates, algae and fish were
higher than the definite PBT criterion of 0.01 mg/l. In addition, MTBE
is not classified as being CMR and there is no evidence that MTBE is
chronically toxic towards mammals. Therefore, based on the aquatic and
mammalian toxicity data, MTBE is not assigned as being toxic.
The overall conclusions, based on the present available data, are that
the (screening) criteria for PBT/vPvB, as outlined in Annex XIII of
Directive 2006/121/EC, are not met and that further testing in the scope
of the final PBT assessment is not considered to be required.
Emission Characterisation MTBE is not a PBT/vPvB substance, therefore an
emission characterisation does need not to be conducted.
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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