Registration Dossier
Registration Dossier
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EC number: 200-751-6 | CAS number: 71-36-3
Phototransformation in air
Administrative data
Link to relevant study record(s)
Description of key information
After evaporation or exposure to the air, the product will be slowly degraded by photochemical processes.
Key value for chemical safety assessment
- Half-life in air:
- 53.5 h
- Degradation rate constant with OH radicals:
- 0 cm³ molecule-1 s-1
Additional information
Measured rate constants of butan-1 -ol are similar to calculated ones. For example, Atkinson (1989) reported measured rate constants for indirect photodegradation of 7.2 and 8.31 E-12 cm3 molecule-1 sec-1, resulting in half times for OH-degradation of 53.5 and 46.3h, respectively. This is supported by a calculation using SRC AOP v1.92, revealing a rate constant of 6.89 E-12 cm molecule-1 sec-1 and resulting in a half time of 55.9 hours for indirect photodegradation. Therefore, degradation of butan-1 -ol by phototransformation is of minor importance.
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