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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Phototransformation in air

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Administrative data

Link to relevant study record(s)

Reference
Endpoint:
phototransformation in air
Type of information:
(Q)SAR
Adequacy of study:
key study
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: Validated QSAR model
Principles of method if other than guideline:
Calculation based on AOPWIN v1.92, Estimation Programs Interface Suite™ for Microsoft® Windows v 4.10. US EPA, United States Environmental Protection Agency, Washington, DC, USA.
GLP compliance:
no
Estimation method (if used):
PHOTOCHEMICAL REACTION WITH OH RADICALS
- Concentration of OH radicals: 0.5E+06 radicals/cm3
- Degradation rate constant: 13.5390 E-12 cm3/molecule-sec
- Temperature for which rate constant was calculated: 25 °C
- Computer programme: AOPWIN v1.92
DT50:
28.44 h
Test condition:
calculation based on 24 h day

For detailed describtion on the model and its applicability, see "Any other information on materials and methods incl. tables". The estimation is based on a 24 hour day.

Description of key information

Phototransformation in air is not relevant due to low vapour pressure (0.17 Pa at 20 °C)

Key value for chemical safety assessment

Additional information

No experimental studies investigating the phototransformation in air of isodecyl pivalate (CAS 60209-82-7) are available. Results obtained with AOPWIN v1.92 indicate that isodecyl pivalate is susceptible to undergo indirect photodegradation in air. The estimated half-life for the reaction with OH-radicals is 28.44 h (24 h day; OH-concentration: 0.5E+06 OH/cm³). However, this is not expected to be a relevant environmental fate process, since isodecyl pivalate is not expected to be present in the atmosphere based on the low estimated vapour pressure under ambient conditions (0.17 Pa at 20 °C). As this study is not a standard information requirement in REACh and there is no indication from the Chemical Safety Assessment (CSA) on the need to investigate further the fate and behaviour of the substance (Annex X requirement), no further testing is considered necessary for isodecyl pivalate.