
Acephate, also known as Orthene, is a widely used organophosphate foliar insecticide that has been a cornerstone in agricultural pest management since the 1990s. This article provides an in-depth analysis of Acephate's chemical properties, technical specifications, applications, safety considerations, and the company behind its production, Hebei Dongfeng Chemical Technology Co., Ltd.. The information is structured to ensure clarity and utility for agricultural professionals, researchers, and industry stakeholders.
Acephate is a contact and systemic insecticide designed to control a broad spectrum of pests, including sucking and chewing insects in crops such as cotton, fruits, vegetables, and ornamentals. Its mechanism of action involves the inhibition of acetylcholinesterase (Ache), an enzyme critical for nerve signal transmission in insects. This disruption leads to paralysis and death of the target pests. Notably, Acephate is metabolized into methamidophos, a more potent compound, but its formulation ensures minimal risk to humans and animals due to its low toxicity profile.

Figure 1: Acephate in its solid form, typically white to yellow in color.
The following table summarizes the key technical specifications of Acephate, as provided by the manufacturer:
| Property | Details |
|---|---|
| Melting Point | 93°C |
| Density | 1.35 g/cm³ |
| Vapor Pressure | 2.26 × 10⁻⁴ Pa at 24°C |
| Flash Point | 2°C |
| Storage Temperature | Approx. 4°C |
| Solubility | Soluble in chloroform, DMSO, and water |
| pKa | 11.00 ± 0.46 (predicted) |
| Form | Solid |
| Color | White to yellow |
| Water Solubility | Readily soluble |
These specifications highlight Acephate's stability and versatility in various formulations, including technical concentrates, soluble powders, and emulsifiable concentrates. The solubility in water ensures effective application through foliar sprays, while its low vapor pressure minimizes environmental dispersion.

Figure 2: Acephate's solubility in water, a key factor in its application as a foliar spray.
Acephate is a versatile insecticide with applications across multiple agricultural sectors. It is particularly effective against:
The insecticide's systemic activity allows it to be absorbed by plant tissues, providing long-lasting protection. This makes it ideal for crops like cotton, where pests such as armyworms and bollworms are prevalent. Additionally, Acephate's moderate persistence ensures it remains effective without excessive environmental accumulation.

Figure 3: Acephate's application in horticultural crops, such as vegetables and ornamentals.
Hebei Dongfeng Chemical Technology Co., Ltd. offers a range of Acephate formulations to suit different agricultural needs:
These formulations cater to diverse application methods, including foliar sprays, soil treatments, and seed coatings. The 97% TC and 98% TC variants are ideal for industrial-scale production, while the 75% SP and 40% EC formulations are suitable for small to medium farms.
Acephate is classified under the GHS07 hazard symbol, indicating it is harmful if inhaled, ingested, or absorbed through the skin. The signal word "Warning" underscores the need for caution. Key safety statements include:
Proper handling and storage are critical. Acephate should be stored at 4°C to maintain stability and prevent degradation. Users must adhere to UN1648 3/PG 2 regulations for transportation, ensuring compliance with global safety standards.
For detailed safety information, refer to the product page.
Hebei Dongfeng Chemical Technology Co., Ltd. is a leading manufacturer of agricultural chemicals, specializing in the production of high-quality insecticides and pesticides. With a focus on innovation and sustainability, the company has established itself as a trusted supplier in the global market. Their product range includes various formulations of Acephate, tailored to meet the demands of modern agriculture.
For more information about the company, visit their official website.
While Acephate is effective against pests, its environmental impact is a subject of ongoing research. The National Institute of Standards and Technology (NIST) provides guidelines for the measurement and reporting of chemical properties, ensuring consistency in safety and efficacy standards. According to NIST, the accurate measurement of parameters like solubility and vapor pressure is essential for assessing environmental risks (NIST Special Publication 811, 2025).
References:
NIST. (2025). NIST Guide to the SI. Retrieved from https://www.nist.gov.
Acephate remains a vital tool in agricultural pest management due to its efficacy, versatility, and safety profile. Its chemical properties, including high solubility and moderate persistence, make it suitable for a wide range of applications. Hebei Dongfeng Chemical Technology Co., Ltd. continues to innovate, offering diverse formulations to meet the needs of modern agriculture. As with any chemical product, adherence to safety protocols and regulatory guidelines is essential to minimize risks and maximize benefits.