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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

Half-life in air:
2.557 h

Additional information


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 3,3'-iminodi(propylamine (CAS 56 -18 -8) (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.


The photodegradation was calculated for 3,3'-iminodi(propylamine (CAS 56 -18 -8) with AOPWIN v1.92, implemented in EPISuite v4.11.

Based on an estimated OH radical rate constant of 150.56 E-12 cm³/molecule-sec, the half-life was calculated to be 2.557 hours; for this calculation a 24 -hour day as well as a sensitizer-concentration (OH-radicals) of 0.5E+06 molecules/cm³ were assumed (BASF SE, 2017).

Hence, the test substance is expected to be rapidly degraded by photochemical processes after evaporation or exposure to air.