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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Environmental fate & pathways

Hydrolysis

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Administrative data

Link to relevant study record(s)

Description of key information

The measured half-life of CHPTAC at pH 7.8 and 12°C was 21 days.

Key value for chemical safety assessment

Additional information

The reaction of CHPTAC with water is more complex than a simple first order hydrolysis reaction. In a standard hydrolysis test conducted according to EC Test Method C.7 the half-life at 35 °C and pH 7 was 3.75 days. Extrapolating to environmental conditions (12 °C) the corresponding half life is predicted to be 75.5 days. However, other evidence suggested that true reaction rates under neutral conditions were faster than this, therefore a study was performed under environmentally relevant conditions (Raisio, 2004). In this study the measured half-life of CHPTAC at pH 7.8 and 12°C

was 21 days.