Registration Dossier
Registration Dossier
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EC number: 206-992-3 | CAS number: 420-04-2
Endpoint summary
Administrative data
Description of key information
The derived Kd (0 – 0.09 mL/g) and KOC-values (0 – 6.8 mL/g ) indicate a low adsorption in soil. Although these adsorption coefficients point towards a high potential mobility of cyanamide in soil, the column leaching studies (Römbke, 1991) showed that only 0.13 to 2.8 % of the applied cyanamide are found in the leachate after a 2-day irrigation period starting immediately after application of the test substance. Thus, in column leaching studies cyanamide was only slightly mobile with the mobility decreasing with increasing fineness of soil texture and soil organic carbon content. In general, the leaching potential of a substance is determined both by its adsorption behaviour and by its persistence. Substances with low adsorption coefficients but short half-lives are not expected to leach within the soil profile unless a rain event takes place immediately after application.
Therefore, it can be concluded that under realistic outdoor conditions cyanamide will not be transported at significant amounts into deeper soil layers although laboratory trials indicate a potential mobility of cyanamide. This fact is mainly due to the fast degradation of cyanamide in soil.
Additional information
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