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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Physical & Chemical properties

Boiling point

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Administrative data

Link to relevant study record(s)

Description of key information

Not boiling poiint could be observed because the substance decomposes shortly after the melting process at 288 °C.

Key value for chemical safety assessment

Additional information

According to REACH Regulation (Annex VII, 7.3, column 2), the study on the boiling point does not need to be done if the substance decomposes before the boiling point is reached. L-Tryptophan decomposes at 288°C as could be observed in the determination of the melting point.