Product Specification: Diflubenzuron (Dimilin) 98% TC

Product Name: Diflubenzuron 98% TC
Trade Name: Dimilin
Chemical Name: 1-(4-chlorophenyl)-3-(2,6-difluorobenzoyl)urea
CAS Number: 35367-38-5
Molecular Formula: C₁₃H₉ClF₂N₂O₂
Molecular Weight: 311.67 g/mol
Formulation Type: Technical Concentrate (TC)
Active Ingredient Content: ≥98.0% (by HPLC or GC)

Description:

Diflubenzuron 98% TC is a highly pure insect growth regulator (IGR) belonging to the benzoylurea chemical class. It is widely used in agriculture, forestry, and public health for controlling various insect pests, especially larvae of moths, beetles, mosquitoes, and other insect larvae. Diflubenzuron acts by inhibiting chitin synthesis, thereby preventing the formation of an essential component of the insect exoskeleton, which leads to the failure of molting and eventual death.

This technical grade material is a key raw ingredient in the manufacture of various pesticide formulations including wettable powders, granules, and suspension concentrates. It is highly valued for its selective mode of action, low mammalian toxicity, and minimal impact on beneficial insects.

Physical and Chemical Properties:

• Appearance: White to off-white crystalline powder

• Odor: Odorless or slight chemical odor

• Melting Point: 228–230°C (decomposes)

• Boiling Point: Decomposes before boiling

• Density: Approximately 1.4 g/cm³ (solid form)

• Solubility:

  • Water: Very low (0.2 mg/L at 20°C)

  • Soluble in organic solvents such as acetone, toluene, and methanol

• Stability: Stable under normal storage conditions; sensitive to strong acids and bases

Specification Parameters:

Mode of Action:

Diflubenzuron is an insect growth regulator that specifically inhibits chitin synthesis in insect larvae. Chitin is a critical polysaccharide in the insect exoskeleton and gut lining. By disrupting chitin formation, Diflubenzuron prevents proper molting and exoskeleton formation, leading to larval death during the molting process. It is effective mainly against immature stages of insects and is considered environmentally safer due to its selective action.

Applications:

• Target Pests:

  • Lepidopteran larvae (moths, caterpillars)

  • Coleopteran larvae (beetles)

  • Mosquito larvae

  • Other insect larvae affecting crops, forestry, and public health

• Crops and Areas:

  • Cotton, cereals, vegetables, and fruits

  • Forest plantations

  • Rice paddies and aquatic mosquito control

  • Stored grain protection

• Formulated Products:

  • Wettable powders (WP)

  • Granules (GR)

  • Suspension concentrates (SC)

  • Baits and other specialized formulations

Toxicological Profile:

• Oral LD₅₀ (rat): >5000 mg/kg (very low toxicity)

• Dermal LD₅₀ (rabbit): >5000 mg/kg

• Skin and Eye Irritation: Non-irritant

• Sensitization: Non-sensitizing

• Environmental Impact: Low toxicity to mammals and birds; however, toxic to aquatic invertebrates and some beneficial insects such as crustaceans; avoid contamination of water bodies

Packaging and Storage:

• Packaging: Typically packed in multi-layer polyethylene bags or fiber drums with inner liners, available in 10 kg or 25 kg packages

• Storage Conditions: Store in a cool, dry, and well-ventilated place, away from heat, moisture, and direct sunlight

• Shelf Life: Minimum 2 years under recommended storage conditions

Conclusion:

Diflubenzuron 98% TC (Dimilin) is a selective and effective insect growth regulator widely used in integrated pest management. Its unique mode of action, high purity, and low toxicity profile make it a vital ingredient for controlling insect larvae in agriculture, forestry, and public health sectors. Proper handling and environmental precautions ensure its safe and effective use, contributing to sustainable pest control solutions.