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Environmental fate & pathways


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Description of key information

Hydrolysis: half life - less than 5 minutes.

Key value for chemical safety assessment

Half-life for hydrolysis:
5 min
at the temperature of:
25 °C

Additional information

Hydrolysis as a function of pH has been investigated in accordance with OECD/EU test methods. Hexahydrophthalic anhydride (HHPA) was determined to be unstable at environmental pH range with a half life of less than 5 minutes.