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EC number: 203-052-4
CAS number: 102-77-2
The assessment of PBT and vPvB is performed by comparison of the
relevant intrinsic properties of MBS with the criteria of the REACH
regulation (Annex XIII) as shown in the following table:
PBT and vPvB criteria and the corresponding properties of MBS
MBS is not readily biodegradable, but it hydrolyzes with a half-life of
ca. 24 hours at pH 7.0 and 25°C. The main hydrolysis products of MBS are
MBT, BT and morpholine, and they are also not readily biodegradable.
Therefore MBS is considered as persistent.
MBS is not bioaccumulative with an estimated BCF of 81.34 l/kg. The
hydrolysis products of MBS, such as MBT, BT and morpholine, also have no
bioaccumulation potential with the experimentally determined BCFs all
The lowest NOEC of 0.041 mg/L is reported to fish after 96 hour exposure
to MBT as the main hydrolysis product of MBS, which is above 0.01 mg/l;
and hence MBS does not fulfil the T criteria.
Summary and overall Conclusions on PBT or vPvB Properties
Due to both the B and T criteria are not fulfilled; MBS is neither PBT
nor a vPvB substance.
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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