Registration Dossier
Registration Dossier
Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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.
Use of this information is subject to copyright laws and may require the permission of the owner of the information, as described in the ECHA Legal Notice.
EC number: 205-599-4 | CAS number: 143-33-9
Toxicity to soil macroorganisms except arthropods
Administrative data
Link to relevant study record(s)
Description of key information
According to Regulation (EC) No.1907/2006, Annexes IX, Column 2, studies on effects on terrestrial organisms (short-term toxicity to invertebrates ) need not be conducted if direct and indirect exposure of the soil compartment is unlikely. Long-term toxicity testing shall be considered for substances that have a high potential to adsorb to soil or which are very persistent. Potassium cyanide has a low potential for adsorption to soil/sediment (Koc = 2-3). As the chemical safety assessment for this substance demonstrates that 1) the exposure levels estimated in all relevant scenarios do not exceed the appropriate DNEL or PNEC, and 2) the likelihood and severity of an event occurring due to the physicochemical properties of the substance is negligible, according to Annex 1, Section 6.4, the criteria for adaptation are met. Specifically, all risk characterization ratios are under 1.0, and direct and indirect exposure to sediment is unlikely as demonstrated by the attached exposure assessments. There are no physicochemical hazards identified for this substance. Further testing is not indicated.
Key value for chemical safety assessment
Additional information
The data requirement for toxicity to soil macro-organisms was waived, due to the low potential for soil adsorption of potassium cyanide. A supporting study testing the comparative acute toxicity of potassium cyanide, potassium ferrocyanide and potassium ferricyanide to the earthworm Eisenia fetida showed that the complexed forms of cyanide (potassium ferrocyanide and potassium ferricyanide)
were much less toxic than the simple cyanide salts (potassium cyanide).Information on Registered Substances comes from registration dossiers which have been assigned a registration number. The assignment of a registration number does however not guarantee that the information in the dossier is correct or that the dossier is compliant with Regulation (EC) No 1907/2006 (the REACH Regulation). This information has not been reviewed or verified by the Agency or any other authority. The content is subject to change without prior notice.
Reproduction or further distribution of this information may be subject to copyright protection. Use of the information without obtaining the permission from the owner(s) of the respective information might violate the rights of the owner.
