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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

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 Tridecylamine, branched and linear (TDA, b+l, CAS 86089-17-0) (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:

Tridecylamine, branched and linear (CAS 86089 -17 -0) is a mixture of alkylamines of C13 isomers (99.8 -100%). The assessment of the photodegradability in air is, therefore, based on the available data of the representative isomers1-tridecanamine (CAS 2869-34-3, linear) and C13H29N, branched.

Based on an estimated OH radical rate constant of 4.71E-11 cm³/(molecule*sec) and 4.85E-11 cm³/(molecule*sec), respectively, the half-life of the constituents was calculated to be 8.2 h and 7.9 h for the linear and branched isomers (test conditions: sensitiser for indirect photolysis: OH; 0.5 E06 OH/cm³, 24-h day) (BASF SE, 2014, 2020).

In conclusion, after evaporation or exposure to air, the substance and its constituents will be rapidly degraded by photochemical processes.