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Description of key information

In contact with water tert-butyl methacrylate shows slow hydrolysis.
Calculated half-life at pH 7 and 25 °C: 135 d

Key value for chemical safety assessment

Half-life for hydrolysis:
135 d
at the temperature of:
25 °C

Additional information

Based on the results obtained in an experimental study following OECD guideline 111 (2004), tert-butyl methacrylate (TMBA) hydrolysed slowly in contact with water at pH 4, 7 and 9 at temperatures of 50°C, 60°C and 70°C. The half-life at pH 7 and 25 °C was determined to be135 d (Safepharm laboratories, 2007).

In addition, Q(SAR) data using SRC HYDROWIN v2.00 were used as supporting data, indicating even slower hydrolysation of TBMA in contact with water (calculated half-life at pH 7 and 25 °C: 179 years; at pH 8 and 25 °C: 17.9 years) (BASF SE, 2009).