METALAXYL

Common name: Metalaxyl

Chemical name: Methyl N-(2,6-dimethylphenyl)-N-(methoxyacetyl)-DL-alaninate

Molecular formula: C₁₅H₂₁NO₄

Molecular weight: 279.3

CAS No.：35554-44-0

Structural formula:

Physical chemistry: Form similar white crystals.M.p Tech 63.5-72.3℃,S.g./density    1.20(20℃). V.p0.75mPa(25℃),Solubility In water 8.4g/l(22℃).In ethanol 400,acetone 450,toluene 340,n-hexane 11,n-octanol 68(all in g/l,25℃).Stability stable up to 300℃. Stable in neutral and acidic media at room temperature;on hydrolysis DT50(calc.)(20℃) >200d(Ph1),115d(Ph9),12d(Ph10).  

Use:To control diseases caused by air-and soil borne Peronosporales on a wide range of temperate,subtropical and tropical crops.Foliar sprays with mixtures of metalaxyl and protectant fungigides are recommended to control air-borne diseases caused by Pseudoperonospora humuli on hops,phytophthora infestats on potatoes and tomatoes, peronospora tabacina on tobacco,Plasmopara viticola on vines,Bremia lactucae on lettuce and downy mildews on various vegetable,at 200-300g/ha.Soil applications of metalaxyl alone are used to control soil-borne pathogens causing root and lower stem rots on avocado and citrus,at 500-1500g/ha,Seed treatments control systemic Peronosporaceae on, maize peas,sorghum and sunflowers,as well as damping-off(Pythium spp.)of various crops. 

Mammalian toxicology: OralAcute oral LD50 for rats 669mg/kg.Skin and eye Acute percutaneous LD50 for rats>3100mg/kg.Slight irritant to eyes and skin of rabbits;

Formulation types: 25%,35% Metalaxyl WP,58%,72% Metalaxy•Mancozeb WP,98% Tech

Packing: 25%,35% WP,98% Tech, 58%,72% Metalaxy•Mancozeb WP:25kg/Fiber drum.

Specification:        Active in gredient         % ≥            98
                                Water                           % ≤             0.5  
                                Acidity（as H2SO4）    %≤              0.3
                                Insoluble in acetone      %≤              0.3