Registration Dossier
Registration Dossier
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EC number: 201-074-9 | CAS number: 77-99-6
Phototransformation in air
Administrative data
Link to relevant study record(s)
Description of key information
The degradation of trimethylolpropane in air by reaction with OH-radicals was estimated with the generally accepted AOP programme (v1.92). The half life was calculated to be approx. 28 hours (equivalent to 1.2 days).
Key value for chemical safety assessment
- Half-life in air:
- 1 d
Additional information
Key study:
The degradation of trimethylolpropane in air by reaction with OH-radicals was estimated with the generally accepted AOP programme (v1.92). Based on a 24 h day with an OH radical concentration of 0.5 E06 OH/cm³ the overall OH rate constant was calculated to be 13.7987 E-12 cm³/molecule*sec, leading to a half-life of approx. 28 hours (equivalent to 1.2 days).
Reference: Lanxess, 2009
Further study:
The degradation of trimethylolpropane in air by reaction with OH-radicals was estimated with the Atkinson and with the MOOH-method:
a) Atkinson: Based on a 12 h day with a OH radical concentration of 1.5 E06 OH/cm³, a half-life of 0.86 days was estimated.
b) The calculation according to the MOOH-method resulted in a half-life of 1.85 days.
For this modelling too few data were reported for assessing the reliability. Nevertheless, the result is comparable to the key result.
Reference: Rorije, 1997
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