myclobutanil myclobutanil myclobutanil is a triazole chemical used as a fungicide. it is a steroid demethylation inhibitor, specifically inhibiting ergosterol biosynthesis. ergosterol is a critical component of fungal cell membranes. myclobutanil names iupac name 2-(4-chlorophenyl)-2-(1,2,4-triazol-1-ylmethyl)hexanenitrile identifiers cas number 88671-89-0 y 3d model (jsmol) interactive image beilstein reference 7138849 chebi chebi:75281 n chemspider 6096 n9252226 (2r) y echa infocard 100.101.000 ec number 410-400-0 kegg c18477 y mesh systhane pubchem cid 633611077077 (2r)38989055 (2s) rtecs number xz5257000 unii b6t1jtm6kz y un number 3077 comptox dashboard (epa) dtxsid8024315 inchi inchi=1s/c15h17cln4/c1-2-3-8-15(9-17,10-20-12-18-11-19-20)13-4-6-14(16)7-5-13/h4-7,11-12h,2-3,8,10h2,1h3 nkey: hzjkxkujvseefu-uhfffaoysa-n n smiles ccccc(cn1cncn1)(c#n)c1ccc(cl)cc1 properties chemical formula c15h17cln4 molar mass 288.78 g·mol−1 appearance pale, yellow, translucent crystals melting point 63 to 68 °c (145 to 154 °f; 336 to 341 k) boiling point 202 to 208 °c (396 to 406 °f; 475 to 481 k) at 130 pa solubility in water 142 mg⋅dm−3 hazards ghs labelling: pictograms signal word warning hazard statements h302, h319, h361, h411 precautionary statements p273, p281, p305+p351+p338 nfpa 704 (fire diamond) 2 1 0 flash point > 100 °c (212 °f; 373 k) except where otherwise noted, data are given for materials in their standard state (at 25 °c , 100 kpa). n verify (what is yn ?) infobox references stereoisomerism myclobutanil (2 stereoisomers) (s)-configuration (r)-configuration safety the safety data sheet indicates the following hazards: suspected of damaging fertility or the unborn child. toxic to aquatic life with long lasting effects. the first hazard has caused this chemical to be placed on the 1986 california proposition 65 toxics list. when heated, myclobutanil decomposes to produce corrosive and/or toxic fumes, including carbon monoxide, carbon dioxide, hydrogen chloride, hydrogen cyanide, and nitrogen oxides. banned for cannabis cultivation myclobutanil is banned in canada, colorado, washington, oregon, and oklahoma for the production of medical and recreational cannabis. in 2014, a canadian news investigation by the globe and mail reported the discovery of myclobutanil in medical cannabis produced by at least one government licensed grower. in september 2019, nbc news commissioned cannasafe to test thc cartridges for heavy metals, pesticides, and residual solvents like vitamin e; pesticides, including myclobutanil, was found in products from unlicensed dealers. in michigan, the current state action limit for myclobutanil is 200 ppb in cannabis products.