Registration Dossier

Data platform availability banner - registered substances factsheets

Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

Diss Factsheets

Environmental fate & pathways

Endpoint summary

Administrative data

Description of key information

Additional information

Although MBS is not readily biodegradable with a biodegradability of 0% observed in 28 days, it is abiotically unstable in aquatic environment with a hydrolysis half-life of ca. 24 hours at pH 7.0 and 25°C and with a half-life of direct photolysis in water of 0.78 hour. The hydrolysis products were identified to be mercaptobenzothiazole (CAS: 149-30-4), benzothiazole (CAS: 95-16-9) and morpholine (CAS: 110-91-8). The identified breakdown products are also not readily biodegradable. 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 below 10. At environmentally relevant pH and 25°C the logKoc of MBS is determined to be 2.84, which indicates a moderate adsorption potential. The hydrolysis products, such as MBT and BT, also have a moderate adsorption potential in soil/sediment with the log Koc of 2.51 – 3.55 and 3.0, respectively. Morpholine however has only a low affinity to adsorption with a logKoc of 0.867. MBS is essentially non-volatile with the calculated Henry's law constant lower than 5.52*10-7 Pa m3/mol at 25°C. The estimated half-life in air of MBS is much shorter than 48 hours; and hence no potential for long-range transport of MBS in air is expected. The distribution of MBS in a "unit world" was calculated according to the Mackay fugacity model level I based on the physico-chemical properties. The main target compartment for MBS is water of 71.3 % and sediment of 14.32 %, followed by soil of 14.16 %.