--- description: "Trichlorfon is an organophosphate insecticide active ingredient. It is also known as metrifonate, trichlorphon, chlorophos, or dipterex in different references and markets.\r\nIn pesticide classification, trichlorfon belongs to the organophosphate group. This means it is associated with acetylcholinesterase inhibition, a mode of action that affects normal nerve signal transmission in insects and" title: What Is Trichlorfon? - POMAIS Agriculture image: https://www.pomais.com/wp-content/uploads/2026/01/pomais-logo-1.png --- [Skip to content](#content) 16+ years professional one-stop agricultural plant protection solution provider [![POMAIS](https://www.pomais.com/wp-content/uploads/2026/01/pomais-logo-1.png "pomais logo 1")](https://www.pomais.com/) [Inquiry](#awb-oc__10593) What Is Trichlorfon? Published On: July 14th, 2026900 words4.5 min read # What Is Trichlorfon? [Table Of Contents](#25084480275413606) [Trichlorfon](https://www.pomais.com/product/trichlorfon-insecticide/) is an organophosphate insecticide active ingredient. It is also known as metrifonate, trichlorphon, chlorophos, or dipterex in different references and markets. In pesticide classification, trichlorfon belongs to the organophosphate group. This means it is associated with acetylcholinesterase inhibition, a mode of action that affects normal nerve signal transmission in insects and other exposed organisms. Trichlorfon should be understood as an insecticide, not a fungicide or herbicide. It is a defined pesticide active ingredient with a specific chemical identity, regulatory status, and safety profile. Any product based on trichlorfon must be evaluated according to local registration and safety requirements. ## Quick Answer: What Is Trichlorfon? Trichlorfon is a non-systemic organophosphate insecticide active ingredient. It is used in pesticide classification as a neuroactive insecticide and is associated with acetylcholinesterase inhibition. The most important point is simple: **Trichlorfon is an organophosphate insecticide, not a fungicide, herbicide, or plant growth regulator.** | Item | Information | | --- | --- | | Common name | Trichlorfon | | Other names | Metrifonate, trichlorphon, chlorophos, dipterex | | CAS number | 52-68-6 | | Molecular formula | C₄H₈Cl₃O₄P | | Molecular weight | About 257.4 g/mol | | Pesticide class | Organophosphate insecticide | | Basic mode of action | Acetylcholinesterase inhibition | | Related compound | Dichlorvos, formed under certain degradation conditions | | General physical description | White crystalline solid | This basic identity helps separate trichlorfon from other pesticide groups and prevents confusion with unrelated products. ## What Type of Pesticide Is Trichlorfon? Trichlorfon is an insecticide active ingredient. It belongs to the organophosphate chemistry group. Organophosphate insecticides are widely known for their effect on the nervous system through acetylcholinesterase inhibition. This classification is important because it defines the basic technical identity of trichlorfon. Trichlorfon is not: - A fungicide - A herbicide - A biological pesticide - A plant growth regulator - A fertilizer - A microbial control agent It should be described accurately as an **organophosphate insecticide**. ## Trichlorfon Chemical Identity Trichlorfon has a clear chemical identity. Its CAS number is **52-68-6**. Its molecular formula is **C₄H₈Cl₃O₄P**. It is commonly described as a white crystalline solid. Several names may appear in technical documents, product references, or historical sources. Common names include: - Trichlorfon - Metrifonate - Trichlorphon - Chlorophos - Dipterex - Metriphonate These names may refer to the same active ingredient or related naming conventions used in different markets and references. For technical writing, the name **Trichlorfon** should be used as the main term. Other names can be mentioned once as synonyms, but they should not replace the core name throughout the page. ## Basic Mode of Action of Trichlorfon Trichlorfon is associated with acetylcholinesterase inhibition. Acetylcholinesterase is an enzyme involved in normal nerve signal regulation. When this enzyme is inhibited, nerve signal transmission is disrupted. In simple terms, trichlorfon affects the nervous system of target insects and other exposed organisms through organophosphate activity. This is why trichlorfon is classified as a neuroactive insecticide. The basic mode of action can be described as: **Trichlorfon is an organophosphate compound linked to acetylcholinesterase inhibition, which interferes with normal nerve function.** This explanation is enough for a definition page. It does not need to become a full toxicology discussion. ## Trichlorfon and Dichlorvos Trichlorfon has an important relationship with dichlorvos. Under certain conditions, trichlorfon can convert or degrade into dichlorvos. Dichlorvos is also an organophosphate compound and is associated with acetylcholinesterase inhibition. This relationship is part of the core identity of trichlorfon because it affects how the active ingredient is understood in chemical, environmental, and regulatory contexts. The conversion can be influenced by conditions such as pH. Trichlorfon is more unstable under alkaline conditions and can form dichlorvos during degradation. This does not mean trichlorfon and dichlorvos are the same product. They are different compounds. However, their chemical relationship is important and should be mentioned in any accurate definition of trichlorfon. ## Why Trichlorfon Requires Careful Understanding Trichlorfon requires careful understanding because it is an organophosphate insecticide. This matters for four reasons. First, its pesticide class is associated with acetylcholinesterase inhibition. This gives it a clear neuroactive identity. Second, it has a defined chemical relationship with dichlorvos under certain degradation conditions. Third, regulatory treatment of organophosphate insecticides can differ significantly by country and market. Fourth, product claims, handling language, and label use must follow local registration requirements. For this reason, trichlorfon should not be described casually or broadly. It should be explained with correct chemical identity, pesticide class, and safety context. ## FAQ ### Is trichlorfon an insecticide? Yes. Trichlorfon is an organophosphate insecticide active ingredient. ### Is trichlorfon a fungicide? No. Trichlorfon is not a fungicide. It is classified as an insecticide. ### What is another name for trichlorfon? Trichlorfon is also known as metrifonate or trichlorphon. Other names such as chlorophos and dipterex may also appear in references. ### What is the CAS number of trichlorfon? The CAS number of trichlorfon is 52-68-6. ### What is the molecular formula of trichlorfon? The molecular formula of trichlorfon is C₄H₈Cl₃O₄P. ### What is the mode of action of trichlorfon? Trichlorfon is associated with acetylcholinesterase inhibition, which affects normal nerve signal transmission. ### Is trichlorfon the same as dichlorvos? No. Trichlorfon and dichlorvos are different compounds. However, trichlorfon can convert or degrade into dichlorvos under certain conditions. ## Practical Summary Trichlorfon is an **organophosphate insecticide active ingredient** with the CAS number **52-68-6** and molecular formula **C₄H₈Cl₃O₄P**. It is associated with acetylcholinesterase inhibition and has a chemical relationship with dichlorvos under certain degradation conditions. In simple terms, trichlorfon should be understood as a neuroactive organophosphate insecticide, not as a fungicide, herbicide, or general crop input. 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