Etoxazole

Product Details

CasNo： 153233-91-1

MF： C21H23F2NO2

Appearance： powder

Delivery Time： 15 days

Packing： 25kg/drum

Purity： 98%

• Basic Information

  • Chinese Name: 乙螨唑
  • English Name: Etoxazole
  • Chemical Name: (RS)-5-tert-Butyl-2-[2-(2,6-difluorophenyl)-4,5-dihydro-1,3-oxazol-4-yl]phenetole
  • CAS Number: 153233-91-1
  • Molecular Formula: C₂₁H₂₃F₂NO₂
  • Molecular Weight: 359.4

• Physical and Chemical Properties

  • Appearance: Pure product is a white crystalline powder.
  • Melting Point: 101.5-102.5℃
  • Decomposition Temperature: 293℃
  • Vapor Pressure: 7.0×10⁻⁶ Pa (at 25℃)
  • n-Octanol/Water Partition Coefficient: Log P = 5.59 (at 25℃)
  • Solubility: 7.04×10⁻⁵ g/L in water (at 20℃); 309.4 g/L in acetone, 104.0 g/L in methanol, and 251.7 g/L in xylene (all at 20℃).

• Toxicity

  • Acute Toxicity: The acute oral LD₅₀ for rats and mice is >5000 mg/kg; the acute dermal LD₅₀ for rats is >2000 mg/kg; the acute inhalation LC₅₀ for rats is >1.09 mg/L.
  • Other Toxicity: It has no irritation to rabbit eyes and skin, and no skin sensitization to guinea pigs. It is non-mutagenic. The LD₅₀ for honeybees is >200 μg/bee (via oral and contact exposure). It disrupts the molting process of aquatic arthropods and shows high toxicity to silkworms.

• Mode of Action

  • Etoxazole is a diphenyloxazoline derivative that mainly inhibits chitin synthesis. It hinders the embryonic development of mite eggs and the molting process from larval mites to adult mites, thereby exerting excellent contact toxicity against mites at different stages (egg, larva, and pupa). However, it has poor control efficacy against adult mites.

• Product Features

  • Broad Acaricidal Spectrum: It provides effective control against various harmful mites that infest crops such as greenhouse vegetables and melons, corn, cotton, wolfberry, fruit trees, and flowers.
  • High Ovicidal Activity: It effectively controls mite eggs, larval mites, and nymphal mites, with particularly high ovicidal activity. It can also render female adult mites sterile, reducing the population base of mite pests in the next generation.
  • Long Persistent Period: The persistent period is over 30 days on corn, cotton, vegetables, and ornamental plants, and can reach 40-50 days on fruit trees.
  • Rainfastness: After application, even if it rains, the residual amount of the liquid on leaves is sufficient to achieve the expected control effect.
  • High Safety: It has minimal harm to many beneficial insects (such as honeybees) and predatory mites, and no phytotoxicity to any crops has been reported so far.

• Suitable Crops and Application Methods

  • Suitable Crops: Mainly used for fruit trees (e.g., apples, citrus), as well as crops such as cotton, flowers, and vegetables.
  • Application Methods: For example, 11% etoxazole suspension concentrate can be diluted with water by 5000-7500 times and sprayed.

• Precautions

  • Etoxazole is ineffective against adult mites, so it should be applied at the early stage of mite infestation (i.e., the egg and larval mite stages).
  • Due to its high toxicity to aquatic organisms and long-term persistent impact, it should be kept away from water sources during application.
  • It is highly toxic to silkworms; during spraying, measures should be taken to prevent the pesticide from drifting and adhering to mulberry trees or related areas.