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English Name: Metalaxyl
CAS: 57837-19-1
Chemical Formula: C15H21NO4
Molecular Weight: 279.33
Density: 1.1083 (rough estimate)
Melting Point: 72-73°C
Boiling Point: 422.1°C (rough estimate)
Flash Point: 100°C
Water Solubility: 0.84 g/100 mL
Vapor Pressure: 7.5 x 10^-4 Pa (25°C)
Solubility: Chloroform (slightly soluble), Methanol (slightly soluble)
Refractive Index: 1.5130 (estimate)
Acidity Constant: 1.41±0.50 (Predicted)
Storage Conditions: Sealed, dry, 2-8°C
Appearance: Clean
Color: Off-White to Pale Beige
BRN: 2947777

Physical and Chemical Properties: The pure product appears as white crystals. Melting point 71–72°C, vapor pressure 2.933×10^-4 Pa (20°C), relative density 1.21 (20°C). Soluble in various organic solvents, with methanol solubility of 65% and water solubility of 0.71% (20°C). Stable in acidic and neutral mediums. The raw powder is yellow to brown, with a flash point of 155°C (closed cup). Not easily flammable, non-explosive, and non-corrosive.

Properties: White crystals, melting point 71–72°C, vapor pressure (20°C) 2.933×10^-4 Pa, relative density (20°C) 1.21. Soluble in various organic solvents, methanol solubility 65%; water solubility (20°C) 0.71%. Stable in acidic and neutral mediums. Not easily flammable, non-explosive, non-corrosive.

Uses: A new, highly effective systemic fungicide with selective action against oomycete fungi like downy mildew and Phytophthora. It works well against potato late blight, grape downy mildew, hop downy mildew, beet downy mildew, oilseed rape white rust, tobacco black shank, and more. It can be absorbed into plants and is much more water-soluble than general fungicides. Also effective for cotton damping-off and millet white disease, showing good control effects.