What is Cyhalothrin?

Cyhalothrin (ISO common name) is an organic compound classified as a synthetic pyrethroid, a class of insecticides that mimic the natural insecticidal properties of pyrethrins found in chrysanthemum flowers. The compound has the CAS number 91465-08-6, with the molecular formula C23H19ClF3NO3 and a molecular weight of 449.9 g/mol.

The term "Cyhalothrin" actually refers to a mixture of stereoisomers, but the lambda-cyhalothrin isomer (also known as λ-cyhalothrin) is the most biologically active form and is widely used in commercial formulations.

What Are the Benefits?

1. Rapid Knockdown Effect

One of the primary benefits of cyhalothrin is its fast-acting knockdown effect. Upon contact or ingestion, the insecticide quickly immobilizes insects, providing immediate control of existing pest populations.

2. Broad-Spectrum Activity

Lambda-cyhalothrin is effective against a wide range of insects, including beetles, caterpillars, aphids, thrips, mosquitoes, ticks, and flies.

3. Long-Lasting Residual Effect

Compared to natural pyrethrins, synthetic cyhalothrin provides prolonged insecticidal activity. This means fewer applications are needed to maintain effective pest control.

4. Low Mammalian Toxicity

When used according to label directions, cyhalothrin presents relatively low toxicity to mammals compared to organophosphate and carbamate insecticides.

What Are the Uses?

Agricultural Applications

Lambda-cyhalothrin is extensively used in agriculture to protect crops including:

• Cotton: Primary use for controlling boll weevils, aphids, and leafhoppers
• Cereals: Wheat, barley, and rice protection
• Vegetables: Tomatoes, peppers, cucumbers, and leafy greens
• Fruits: Apples, pears, grapes, and citrus

Public Health Applications

Beyond agriculture, cyhalothrin plays a crucial role in public health pest control: mosquito control, tick and mite control, fly control, and cockroach elimination.

Safety and Handling

When handling cyhalothrin, always use appropriate PPE including chemical-resistant gloves, protective eyewear, and long-sleeved clothing. The product is toxic to aquatic organisms and pollinators, so applications should be carefully timed.

Chemical Specifications

Property	Value
CAS Number	91465-08-6
Molecular Formula	C23H19ClF3NO3
Molecular Weight	449.9 g/mol
Appearance	Pale yellow to brown viscous liquid
Purity	Typically 95%+ technical grade

Frequently Asked Questions

Q: What is the difference between cyhalothrin and lambda-cyhalothrin?

A: Cyhalothrin refers to the mixture of all isomers, while lambda-cyhalothrin is the most biologically active single isomer.

Q: How long does lambda-cyhalothrin remain effective?

A: The residual effect typically lasts 7-14 days, depending on environmental conditions.

Q: Is lambda-cyhalothrin harmful to beneficial insects?

A: Yes, lambda-cyhalothrin is toxic to beneficial insects including honeybees. Applications should be timed to minimize impact on pollinators.

Why Choose Our Cyhalothrin?

When sourcing Cyhalothrin for your agricultural or pest control needs, our products offer quality assurance, technical support, competitive pricing, and reliable supply.

Conclusion

Cyhalothrin (CAS 91465-08-6), particularly in its lambda form, represents a highly effective solution for modern pest management. Its rapid action, broad-spectrum activity, and relatively favorable safety profile make it a valuable tool for agricultural producers, pest control professionals, and public health officials alike.