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English Name: Dimethomorph
CAS Number: 110488-70-5
Molecular Formula: C21H22ClNO4
Molecular Weight: 387.9
Chemical Structure:

Physical and Chemical Properties:
Off-white or light yellow powder. Melting point (°C): 125-129, Boiling point (°C, at normal pressure): not determined; Refractive index (n20/D): not determined; Flash point (°C): not determined; Saturated vapor pressure (kPa, 25°C): not determined; Solubility: not determined; Density (g/mL, 25°C): not determined.

Toxicity and Safety:
A low-toxicity fungicide. Acute oral LD50 in rats >3900 mg/kg, dermal LD50 >2000 mg/kg, acute inhalation LC50 in rats >4.24 mg/L. Non-irritating to rabbit skin, slightly irritating to eyes. No mutagenic, teratogenic, or carcinogenic effects under test conditions. 90-day feeding test in rats, no effect at 200 mg/kg. Moderate toxicity to fish, LC50 for carp 14 mg/L (96 hours). Low toxicity to bees under normal use, oral LD50 >100 µg/bee. Non-toxic to silkworms, low toxicity to birds, acute oral LD50 for wild ducks >2000 mg/kg. No effect on natural enemies, no effect on earthworms at 1000 mg/kg soil.

Product Uses:
Dimethomorph is a specific fungicide for Oomycetes. Its mechanism targets the formation of cell wall membranes and is effective at all stages of the oomycete life cycle, especially sensitive during sporangiophore and oospore formation, inhibited even at very low concentrations (<0.25 µg/ml). No cross-resistance with phenylamide fungicides. Dimethomorph is specifically for controlling oomycete fungal diseases and is effective against mildew, downy mildew, late blight, blight, and other fungal diseases. Can be applied to grapes, lychee, cucumber, melon, bitter gourd, tomato, chili, potato, and cruciferous vegetables.