Aliphatic Diesters Group

Information sheet

These substances were identified for action under the Chemicals Management Plan (CMP).  This screening assessment focuses on 1 of 2 substances referred to collectively as the Aliphatic Diesters Group.

Summary of publications
Substance group CAS RN Common name DSL name Public comments on the draft screening assessment Final screening assessment Conclusion on section 64 criteria Follow-up activities
Aliphatic Diesters Group 27178-16-1 Diisodecyl adipate (DIDA) Hexanedioic acid, diisodecyl ester HTML HTML Does not meet Significant New Activity

Follow-up activities

While exposure of the general population to DIDA is not of concern at current levels, this substance is considered to have a health effect of concern due to its potential to cause developmental toxicity. Therefore, there may be a concern for human health if exposures were to increase. The proposed follow-up activity for DIDA is to apply the Significant New Activity (SNAc) provisions of the Canadian Environmental Protection Act, 1999 (CEPA 1999).

Date Activity
February 9, 2019 Publication in the Canada Gazette, Part I: Vol. 153, No. 6 of the SNAc notice of intent and start of the 60-day public comment period.
February 9, 2019 Publication of the final screening assessment. The related notice was published in the Canada Gazette, Part I: Vol. 153, No. 6.
December 2, 2017 Publication and start of 60-day public comment period on the draft screening assessment (including follow-up activities). The related notice was published in the Canada Gazette, Part I: Vol. 151, No. 48.


One other substance, nonanedioic acid, bis(2-ethylhexyl) ester (CAS RN 103-24-2), was identified as being part of the Aliphatic Diesters Group at the outset of the third phase of the CMP. This substance was subsequently determined to be of low concern to both human health and the environment through another approach.  Conclusions for this substance are provided in the Screening Assessment for Substances Identified as Being of Low Concern using the Ecological Risk Classification of Organic Substances and the Threshold of Toxicological Concern (TTC)-based Approach for Certain Substances.

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