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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Endpoint summary

Administrative data

Description of key information

Additional information

Tertiary butyl acetate is expected to hydolyse slowly in water, with half-life at environmentally relevant conditions expected to be between 6 -12 months. Based on the chemical structure of tertiary butyl acetate, it is considered to hydrolyse at the ester functional group to give tertiary butyl alcohol and acetic acid. Estimated half-life for atmospheric degradation was 19.7 days.The reaction rate constant for OH radical degradation was determined to be 0.56 +/- 0.05 E-12 cm3/molecule/second.

When tertiary butyl acetate is reacted with OH radicals in the presence of NO, the products acetone and acetic anhydride are formed at molar formation yields of 0.49 +/- 0.05 and 0.20 +/- 0.02 respectively.

The POCP of tertiary butyl acetate has been calculated as 6.5. Ethane has a POCP of 12.3 and it has been long established to be unreactive and not thought to significantly contribute to regional scale ozone formation. Tertiary butyl acetate has a POCP lower than that of ethane and so could be considered to provide a negligible contribution to regional scale ozone formation.

Using the MIR, MOIR and EBIR scales, tertiary butyl acetate yields reactivity values (gm O3/gm VOC) of 0.180, 0.102 and 0.062 respectively.