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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Melting point / freezing point

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Administrative data

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Description of key information

Decomposition of the test substance (> 340 °C) before the melting point is reached.

Key value for chemical safety assessment

Additional information

A TGA/DTA curve and FTIR spectra for characterization of sodium nitrilo-triacetate monohydrate were determined.

Sodium nitrilo-triacetate monohydrate shows a reversible dehydration between 120°C and 215°C. The second transition is degradation beginning slowly at 340°C, the rapidly at 390°C until 421°C, with maximum weight loss rate occurring at 410°C. After this initial degradation phase further slower degradation occurs. Remaining sample has transformed from a white crystalline solid to a black char.

Thus, the decomposition is beginning slowly at 340°C.

Several additional handbook and database data confirm, that the test substance decomposes before reaching the melting point.