Registration Dossier

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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Administrative data

acute toxicity: inhalation
Data waiving:
exposure considerations
Justification for data waiving:

Data source

Materials and methods

Results and discussion

Applicant's summary and conclusion

Executive summary:

Waiving: Additional testing of C36-alkylenediamine (Dimerdiamine) for acute inhalation toxicity is not appropriate, as exposure of humans via inhalation is not likely. Due to the very low vapour pressure (2.2 x10-5 hPa @ 20°C) inhalation of vapours leading to irritation of airways will not occur. Also aerosol exposures are not likely to occur in view of its only use as industrial intermediate under conditions that do not lead to aerosol formation. Testing for acute toxicity by inhalation route is therefore generally not needed according to REACH regulation (EC) 1907/2006 (Annex VIII, point 8.5, column 2).

Furthermore, testing would also not be justified because of animal welfare reasons. This dimerdiamine is severely irritating to skin and is classified as corrosive to the eyes, whereas its systemic toxicity is low. It can be expected that aerosol levels which would lead to severe local damage in the airways will not lead to systemic toxicity following absorption from larger and smaller bronchi, as most of the inhaled amounts will deposit in larger airways and will be ingested after mucociliary transport to the pharynx.