Registration Dossier

Environmental fate & pathways

Phototransformation in air

Currently viewing:

Administrative data

Link to relevant study record(s)

Description of key information

THPA D3

It is predicted that the substance will be degraded in the atmosphere

- Reaction with OH radicals, half-life: 6.42 hours.

- Reaction with ozone, half-life: 1.38 hours.

- Overall degradation rate constant with OH radicals: 5.19E-6 cm3 molecule-1 day-1

THPAc D3

It is predicted that the substance will be degraded in the atmosphere

- Reaction with OH radicals, half-life: 6.01 hours.

- Reaction with ozone, half-life: 1.38 hours.

- Overall degradation rate constant with OH radicals: 5.53E-6 cm3molecule-1day-1

THPA D4

It is predicted that the substance will be degraded in the atmosphere

- Reaction with OH radicals, half-life: 6.43 hours.

- Reaction with ozone, half-life: 1.38 hours.

- Overall degradation rate constant with OH radicals: 5.17E-6 cm3molecule-1day-1

THPAc D4

It is predicted that the substance will be degraded in the atmosphere

- Reaction with OH radicals, half-life: 6 hours.

- Reaction with ozone, half-life: 1.38 hours.

- Overall degradation rate constant with OH radicals: 5.54E-6 cm3molecule-1day-1

Key value for chemical safety assessment

Half-life in air:
6.01 h
Degradation rate constant with OH radicals:
0 cm³ molecule-1 d-1

Additional information

In the presence of moisture, tetrahydrophthalic anhydride isomers are rapidly hydrolysed to the correspondent tetrahydrophthalic acids, of which THPAc D3 is most relevant to various environmental compartments than the submission substance.