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Environmental fate & pathways

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Administrative data

Description of key information

Photodegradation may play a considerable role under environmental conditions with a half-life of 20.67 h (BASF, 2021). According to an experimental study (Mitsubishi/Safepharm, 2007) slow hydrolysis with a half-life of 135 d at pH 7 and 25 °C is possible.

Additional information

Phototransformation in air:

According to Q(SAR) data using SRC AOP, tert-butyl methacrylate (TBMA) will be rapidly degraded by photochemical processes after exposure to the air reacting with the photochemically produced hydroxyl radicals and with ozone (calculated half-life for a 24-hour day and 0.5E+06 OH/cm3: 20.67 hours; for a 24-hour day and 7E11 O3/cm3: 1 day) (BASF, 2021).


In an experimental study (Mitsubishi/ Safepharm, 2007) according to OECD 111 the hydrolysis potential of TBMA was assessed as function of pH. As a result a half life of 135 d at 25 °C and pH 7 was estimated from the graph concentration versus time (logarithmic). As hydrolysis products of the test material methacrylic acid (2-methyl-2-propenoic acid) and t-butanol (2-methyl-2-propanol) were identified which are readily or inherent biodegradable.