4544 Cyazofamid Cyazofamid is a fungicide used mainly for controlling Oomycete and Plasmodiophora diseases on potatoes and tomatoes. Its mode of action is through preventing foliar and soil action with some residual activity and Respiration inhibitor effects. It has a low aqueous solubility, is unlikely to leach to groundwater and is non-volatile. It is not persistent in soils or aquatic systems. Whilst it has a low mammalian toxicity there is some concern regarding its potential for bioaccumulation. It is a skin and eye irritant. It is moderately toxic to birds, most aquatic organisms, honeybees and earthworms. 120116-88-3 9862076 C13H13ClN4O2S White powder. Organic nitriles decompose into cyanide ions both in vivo and in vitro. Consequently the primary mechanism of toxicity for organic nitriles is their production of toxic cyanide ions or hydrogen cyanide. Cyanide is an inhibitor of cytochrome c oxidase in the fourth complex of the electron transport chain (found in the membrane of the mitochondria of eukaryotic cells). It complexes with the ferric iron atom in this enzyme. The binding of cyanide to this cytochrome prevents transport of electrons from cytochrome c oxidase to oxygen. As a result, the electron transport chain is disrupted and the cell can no longer aerobically produce ATP for energy. Tissues that mainly depend on aerobic respiration, such as the central nervous system and the heart, are particularly affected. Cyanide is also known produce some of its toxic effects by binding to catalase, glutathione peroxidase, methemoglobin, hydroxocobalamin, phosphatase, tyrosinase, ascorbic acid oxidase, xanthine oxidase, succinic dehydrogenase, and Cu/Zn superoxide dismutase. Cyanide binds to the ferric ion of methemoglobin to form inactive cyanmethemoglobin. (L97) Organic nitriles are converted into cyanide ions through the action of cytochrome P450 enzymes in the liver. Cyanide is rapidly absorbed and distributed throughout the body. Cyanide is mainly metabolized into thiocyanate by either rhodanese or 3-mercaptopyruvate sulfur transferase. Cyanide metabolites are excreted in the urine. (L96) No indication of carcinogenicity to humans (not listed by IARC). This is a man-made compound that is used as a pesticide. 2014-08-29T06:51:41Z 2014-12-24T20:26:51Z C18573 true CN(C)S(=O)(=O)N1C(=NC(Cl)=C1C1=CC=C(C)C=C1)C#N C13H13ClN4O2S InChI=1S/C13H13ClN4O2S/c1-9-4-6-10(7-5-9)12-13(14)16-11(8-15)18(12)21(19,20)17(2)3/h4-7H,1-3H3 InChIKey=YXKMMRDKEKCERS-UHFFFAOYSA-N 324.786 324.044774077 Exogenous Solid CHEMBL1863429 8037772