Cyanides

Information sheet

These substances were identified for action under the Chemicals Management Plan (CMP).

The ecological portion of the screening assessment used a moiety-based approach and thereby includes free (unbound) cyanide [hydrogen cyanide (HCN) and the cyanide anion (CN-)] and precursors of free cyanide. As such, the ecological moiety assessment is not limited to consideration of the 10 substances having met the categorization criteria. The human health portion of the screening assessment focuses on the 10 cyanides that were identified as priorities for assessment.

Summary of publications
Substance group CAS RN (cyanides that met categorization criteria) Common name DSL name Draft screening assessment Risk management scope Proposed conclusion on section 64 criteria
Cyanides 74-90-8 Hydrogen Cyanide Hydrocyanic acid HTML HTML Meets one or more of the criteria
143-33-9 Sodium cyanide Sodium cyanide
506-61-6 Potassium dicyanoargentate Argentate(1-), bis(cyano-c)-, potassium
13601-19-9 Tetrasodium ferrocyanide (yellow prussiate of soda) Ferrate(4-), hexakis(cyano-c)-, tetrasodium, (oc-6-11)
13746-66-2 Tripotassium ferricyanide Ferrate(3-), hexakis(cyano-c)-, tripotassium, (oc-6-11)-
13943-58-3 Tetrapotassium ferrocyanide Ferrate(4-), hexakis(cyano-c)-, tetrapotassium, (oc-6-11)-
13967-50-5 Potassium dicyanoaurate Aurate(1-), bis(cyano-c)-, potassium
14038-43-8 Ferric ferrocyanide (Prussian blue, insoluble) Ferrate(4-), hexakis(cyano-c)-, iron(3+) (3:4), (oc-6-11)-
25869-00-5 Ferric ammonium ferrocyanide Ferrate(4-), hexakis(cyano-c)-, ammonium iron(3+) (1:1:1),(oc-6-11)-
25869-98-1 Potassium ferric ferrocyanide
(Prussian blue, soluble or Turnbull's blue)
Ferrate(4-), hexakis(cyano-c)-, iron(3+) potassium (1:1:1), (oc-6-11)-
Timelines
Date Activity
January 2019 Anticipated publication of the final screening assessment and the proposed risk management approach for cyanides.
February 10, 2018 Publication and start of 60-day public comment period on the draft screening assessment and the risk management scope for cyanides. The related notice was published in the Canada Gazette, Part I: Vol. 152, No. 6.
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