Registration Dossier

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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Toxicological information

Basic toxicokinetics

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Administrative data

basic toxicokinetics in vitro / ex vivo
Type of information:
experimental study planned
Justification for type of information:
Not much information is available on toxicokinetics of MPA and its esters (Mono- and Poly-alcohols). For oral in vivo studies with administration via gavage, the stomach is the point of first contact of the substance. The acidity of gastric fluid catalyse esterhydrolysis, as well as esterfication. Degree of esterhydrolysis and/or esterfication of the substances will have an impact on their further distribution, metabolism and toxic effects. To gain more information on transformation of MPA and its esters, in vitro simulated gastric acid studies are planned in Q2 2022. The results of these studies will be used to reevaluate and strengthen the reas-across hypothesis selected for the category approach.

Data source

Materials and methods

Test material

Constituent 1
Chemical structure
Reference substance name:
2-ethyl-2-[(3-mercapto-1-oxopropoxy)methyl]propane-1,3-diyl bis[3-mercaptopropionate]
EC Number:
EC Name:
2-ethyl-2-[(3-mercapto-1-oxopropoxy)methyl]propane-1,3-diyl bis[3-mercaptopropionate]
Cas Number:
Molecular formula:
2,2-bis({[(3-sulfanylpropanoyl)oxy]methyl})butyl 3-sulfanylpropanoate

Results and discussion

Applicant's summary and conclusion