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Canada | Cyanides: The Final Screening Assessment for Cyanides was published. The Proposed Risk Management Approach for Cyanides was also published

These substances were identified for action under the Chemicals Management Plan (CMP). The ecological portion of the screening assessment used a moiety-based approach that focused on free cyanide [hydrogen cyanide (HCN) and the cyanide anion (CN-)] and precursors of free cyanide. As such, the ecological moiety conclusion includes, but is not limited to, the 10 substances identified in the table below; however, the human health conclusion is limited to those 10 substances.

Summary of publications
Substance groupCAS RN (cyanides that met categorization criteria)Common nameDSL namePublic comments on the draft screening assessmentFinal screening assessmentProposed risk management approachConclusion on section 64 criteriaFollow-up activities
Cyanides74-90-8Hydrogen cyanideHydrocyanic acidHTMLHTMLHTMLMeets one or more of the criteriaRefer to proposed risk management approach
143-33-9Sodium cyanideSodium cyanide
506-61-6Potassium dicyanoargentateArgentate(1-), bis(cyano-C)-, potassium
13601-19-9Tetrasodium ferrocyanide (yellow prussiate of soda)Ferrate(4-), hexakis(cyano-C)-, tetrasodium, (OC-6-11)
13746-66-2Tripotassium ferricyanideFerrate(3-), hexakis(cyano-C)-, tripotassium, (OC-6-11)-
13943-58-3Tetrapotassium ferrocyanide (yellow prussiate of potash)Ferrate(4-), hexakis(cyano-C)-, tetrapotassium, (OC-6-11)-
13967-50-5Potassium dicyanoaurateAurate(1-), bis(cyano-C)-, potassium
14038-43-8Ferric ferrocyanide (Prussian blue, insoluble)Ferrate(4-), hexakis(cyano-C)-, iron(3+) (3:4), (OC-6-11)-
25869-00-5Ferric ammonium ferrocyanideFerrate(4-), hexakis(cyano-C)-, ammonium iron(3+) (1:1:1),(OC-6-11)-
25869-98-1Potassium ferric ferrocyanide
(Prussian blue, soluble or Turnbull's blue)
Ferrate(4-), hexakis(cyano-C)-, iron(3+) potassium (1:1:1), (OC-6-11)-


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