Product Specification: Pyriproxyfen Powder 98% TC (Technical Concentrate)

Product Name: Pyriproxyfen
Chemical Name: (RS)-2-[1-Methyl-2-(4-phenoxyphenoxy)ethoxy]pyridine
CAS Number: 95737-68-1
Molecular Formula: C₂₁H₁₉NO₃
Molecular Weight: 321.38 g/mol
Formulation Type: Technical Concentrate (TC) – Powder form
Purity: ≥98.0% active ingredient by weight

Description

Pyriproxyfen is a highly effective insect growth regulator (IGR) belonging to the juvenile hormone analog class. It interferes with the normal development and reproduction of insects by mimicking juvenile hormones, thereby disrupting the life cycle and preventing maturation to the adult stage. Pyriproxyfen is widely used in agriculture, public health, and veterinary sectors to control a variety of pests such as whiteflies, aphids, fleas, mosquitoes, and other harmful insects.

The 98% technical concentrate (TC) is a fine powder containing the active ingredient in high purity and serves as the raw material for formulating various end-use products like emulsifiable concentrates, wettable powders, and granules.

Physical and Chemical Properties

• Appearance: White to off-white crystalline powder

• Odor: Odorless to faint chemical odor

• Melting Point: Approximately 138–141°C

• Solubility:

  • Practically insoluble in water (<0.1 mg/L at 20°C)

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

• Density: Approximate bulk density of 0.5–0.7 g/cm³

• Stability: Stable under normal storage conditions; sensitive to prolonged exposure to heat, light, and moisture

Specification Parameters

Mode of Action

Pyriproxyfen acts as a juvenile hormone mimic that disrupts the normal development of insect larvae. By maintaining artificially high levels of juvenile hormone, it prevents larvae from pupating and developing into reproductive adults. This results in population control by reducing insect reproduction and emergence.

Unlike neurotoxic insecticides, pyriproxyfen specifically targets immature stages, making it effective for integrated pest management (IPM) programs due to its selective mode of action and low toxicity to beneficial insects.

Applications

• Target Pests: Whiteflies, aphids, scales, leafhoppers, mosquitoes (larvae), fleas, and other insect pests

• Use Areas: Agriculture (vegetables, cotton, fruits), public health (vector control), veterinary (fleas on pets), stored products

• Formulations: Emulsifiable concentrates, wettable powders, granules, aerosols, and sprays

• Application Rates: Generally applied at 10–50 g a.i./ha depending on crop and pest species

• Timing: Applied during early larval stages for maximum efficacy

Toxicology and Safety

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

• Dermal LD₅₀ (rat): >2000 mg/kg

• Inhalation LC₅₀ (rat): >5 mg/L (4h)

• Skin/Eye Irritation: Non-irritating to mildly irritating

• Carcinogenicity: Not classified as carcinogenic

• Environmental Impact: Low toxicity to birds and mammals; moderately toxic to aquatic invertebrates and fish; safe for bees when used as directed

Packaging and Storage

• Packaging: 10, 25, or 50 kg fiber drums or polyethylene-lined bags

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

• Shelf Life: At least 2 years when stored in original sealed packaging under recommended conditions

Conclusion

Pyriproxyfen 98% TC is a high-purity, potent insect growth regulator offering effective control of a broad spectrum of insect pests through disruption of their developmental cycle. Its selective mode of action, environmental safety profile, and compatibility with integrated pest management programs make it an essential active ingredient in modern pest control solutions.