Registration Dossier

Data platform availability banner - registered substances factsheets

Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Currently viewing:

Administrative data

Link to relevant study record(s)

Description of key information

Waiver. Not a mandatory REACH requirement

Key value for chemical safety assessment

Additional information

In accordance with Annex X of the Regulation (EC) No 1907/2006 REACH concerning the Registration, Evaluation, Authorisation and Restriction of Chemicals, phototransformation in air is not a mandatory information requirement.


Although phototransformation in air is not a mandatory information requirement, calculated data for the representative constituent category of Alchisor TAL 111 (C9 -C14 aliphatics (2 -25% aromatics)) is available. In the case of C9-C14 aliphatics (2 -25% aromatics), indirect photochemical degradation of these hydrocarbons as mediated by OH-attack, is estimated to have a half-life of 0.09 to 1.43 days, or 1.10 to 17.25 hours, based on a 12-hour sunlight day, a rate of 7.4×10-12to 116.3×10-12cm3/mol/sec, and an average OH-concentration of 1.5×106OH/cm3. A 12-hour day half-life value normalizes degradation to a standard daylight period during which hydroxyl radicals needed for photolysis are generated in the atmosphere.