Registration Dossier
Registration Dossier
Use of this information is subject to copyright laws and may require the permission of the owner of the information, as described in the ECHA Legal Notice.
EC number: 203-988-3 | CAS number: 112-59-4
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 rapidly degraded by photochemical processes. The substance has an estimated half-life in air of ca. 9.5 hours. As the cut-off time for reaching the stratosphere is 2 days, the substance is considered to have no potential for reaching the stratosphere and/or long-range atmospheric transport.
Key value for chemical safety assessment
Additional information
QSAR-disclaimer:
In Article 13 of Regulation (EC) No 1907/2006, it is laid down that information on intrinsic properties of substances may be generated by means other than tests, provided that the conditions set out in Annex XI (of the same Regulation) are met.
According to Annex XI of Regulation (EC) No 1907/2006 (Q)SAR results can be used if (1) the scientific validity of the (Q)SAR model has been established, (2) the substance falls within the applicability domain of the (Q)SAR model, (3) the results are adequate for the purpose of classification and labeling and/or risk assessment and (4) adequate and reliable documentation of the applied method is provided.
For the assessment of 2 -(2 -hexyloxyethoxy)ethanol (Q)SAR results were used for phototransformation in air (hydroxyl radical reaction).The criteria listed in Annex XI of Regulation (EC) No 1907/2006 are considered to be adequately fulfilled and therefore the endpoint(s) sufficiently covered and suitable for risk assessment.
Assessment
Based on a calculation using AOPWIN v1.92, the substance is indirectly photodegraded by reaction with hydroxyl radicals in the atmosphere with a half-life (t1/2) of about 9.5 hours taking into account a 24-h day and a mean OH radical concentration of 0.5E06 radicals/cm³. The calculated rate constant is 4.02151 E-11 cm³/molecule-sec (BASF SE, 2021). The substance is within the applicability domain of the model.
Information on Registered Substances comes from registration dossiers which have been assigned a registration number. The assignment of a registration number does however not guarantee that the information in the dossier is correct or that the dossier is compliant with Regulation (EC) No 1907/2006 (the REACH Regulation). This information has not been reviewed or verified by the Agency or any other authority. The content is subject to change without prior notice.
Reproduction or further distribution of this information may be subject to copyright protection. Use of the information without obtaining the permission from the owner(s) of the respective information might violate the rights of the owner.
