Pirimiphos-methyl Insecticide

Pirimiphos-methyl – Broad-Spectrum Organophosphorus Insecticide

Basic Information

• CAS Number: 29232-93-7

• Molecular Formula: C₁₁H₂₀N₃O₃PS

• Molecular Weight: 305.33 g/mol

• Appearance: Light yellow to colorless liquid with a characteristic odor

• Purity: ≥ 95% (technical grade)

Overview
Pirimiphos-methyl is a highly effective organophosphorus insecticide and acaricide with contact, fumigant, and stomach action. It acts by inhibiting acetylcholinesterase, disrupting the nervous system of target pests. Its broad-spectrum activity makes it suitable for controlling a wide range of insect pests including beetles, weevils, moths, mites, and flies.

Applications

• Stored product protection: Effective against pests in grain storage facilities, warehouses, and silos, including rice weevils, flour beetles, and grain moths.

• Household use: Controls cockroaches, ants, flies, and other crawling and flying insects in homes and public spaces.

• Agricultural crops: Used on field crops, fruits, vegetables, and ornamentals to control aphids, thrips, leafhoppers, caterpillars, and mites.

• Public health: Applied in vector control programs for mosquitoes and other disease-carrying insects.

Key Benefits

• Fast-acting with good residual activity.

• Low mammalian toxicity (WHO Class III – slightly hazardous) when used correctly.

• Compatible with most other pesticides and tank-mix partners.

• Available in various formulations (emulsifiable concentrates, dusts, granules, fogging concentrates).

Recommended Usage
Dosage varies by target pest and application method. Typical concentrations range from 0.05% to 0.2% active ingredient in sprays, or 1–5 g/m³ for fumigation in empty silos. Always follow local recommendations and label instructions.

Safety and Handling

• Wear appropriate personal protective equipment (gloves, goggles, respirator) during mixing and application.

• Avoid contamination of food, feed, and water sources.

• Toxic to fish and aquatic invertebrates; prevent runoff into waterways.

• Store in a cool, dry, well-ventilated area, away from oxidizers and alkaline substances.

Packaging
Available in 1 L, 5 L, 20 L, and 200 L drums, as well as custom packaging upon request.

Shelf Life
24 months when stored under recommended conditions.

Quality Assurance
Each batch is analyzed for purity, water content, and pH to ensure consistent performance and regulatory compliance.