Registration Dossier
Registration Dossier
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EC number: 209-097-6 | CAS number: 555-43-1
Phototransformation in air
Administrative data
Link to relevant study record(s)
Description of key information
Not relevant due to low vapour pressure
Key value for chemical safety assessment
Additional information
A publication evaluating the potential for photodegradation in air of glycerol tristearate (CAS No. 555-43-1) is available (Freitag et al., 1985). The test substance was adsorbed to silica gel and irradiated with direct light at a wavelength of 290 nm. After 17 hours of irradiation, 9.9% of the substance was photodegraded. The supporting QSAR calculation (AOPWIN v1.92) resulted in an estimated half-life of the substance in air of 5.3 hours, indicating potential to undergo rapid indirect photodegradation due to reaction with hydroxyl radicals (López Parrón, 2011). Nevertheless, considering the vapour pressure value of the substance (< 5 Pa at 20 °C), this is not expected to be a relevant environmental fate process, since glycerol tristearate is not likely to be present in the atmosphere in relevant amounts.
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