Registration Dossier

Environmental fate & pathways

Phototransformation in air

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Description of key information

After evaporation or exposure to the air, the substance will be rapidly degraded by photochemical processes.

Key value for chemical safety assessment

Half-life in air:
3.634 h

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 the substance (Q)SAR results were used for phototransformation in air.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.

 

Therefore, further experimental studies on phototransformation in air are not provided.

Assessment

A rate constant of 106.0 E-12 cm³/molecule*sec and a half life of 3.6 hours were predicted for 1,1'-(methylimino)dipropan-2 -ol (CAS 4402 -30 -6) in a calculation assuming OH radicals (500000 molecule/cm³) as sensitizer for indirect photolysis and a 24 h day (SRC AOP v1.92; BASF SE, 2018). The substance is within the applicability domain of the model; however, as the substance is a tertiary amine, the prediction is highly uncertain.