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2,4-Dichlorophenol

Updated: 2026-07-17

Overview

2,4-Dichlorophenol (2,4-DCP) is a chlorinated phenolic compound primarily used as an intermediate in the synthesis of herbicides, particularly 2,4-dichlorophenoxyacetic acid (2,4-D). It is also employed in the production of other agrochemicals, disinfectants, and dyes. The compound is characterized by its white to light brown crystalline appearance and distinct phenolic odor. Due to its reactivity and toxicity, 2,4-DCP must be handled with care in industrial settings. It is typically synthesized through the chlorination of phenol, and its production is closely regulated to minimize environmental and health risks. The compound's role as a key intermediate makes it a significant chemical in the agrochemical industry.

Physical and Chemical Properties

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2,4-Dichlorophenol exhibits moderate solubility in water but is more soluble in organic solvents such as ethanol, ether, and benzene. Its melting point ranges between 42-45°C, and it boils at approximately 210°C. The compound's density is 1.38 g/cm³, and it has a molecular weight of 163.00 g/mol. 2,4-DCP is reactive and can undergo further chlorination or other chemical transformations. It is sensitive to light and heat, which can lead to decomposition. The compound's phenolic hydroxyl group makes it acidic, allowing it to form salts with bases. These properties are critical for its use in chemical synthesis and industrial applications.

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Main Applications

The primary application of 2,4-Dichlorophenol is as an intermediate in the production of the herbicide 2,4-D, widely used in agriculture to control broadleaf weeds. It is also used in the synthesis of other agrochemicals, including fungicides and insecticides. Beyond agriculture, 2,4-DCP serves as a precursor in the manufacture of dyes, disinfectants, and pharmaceuticals. Its reactivity makes it valuable in organic synthesis, where it is used to introduce chlorophenol groups into larger molecules. However, its use is declining in some regions due to environmental and health concerns, prompting the development of alternative compounds.

Safety and Storage

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2,4-Dichlorophenol is toxic if ingested, inhaled, or absorbed through the skin. It can cause severe irritation to the eyes, skin, and respiratory tract. Prolonged exposure may lead to systemic effects, including liver and kidney damage. Proper personal protective equipment (PPE), such as gloves, goggles, and respirators, is essential when handling this chemical. Storage conditions should include a cool, dry, well-ventilated area away from oxidizing agents and direct sunlight. Containers must be tightly sealed to prevent moisture absorption and contamination. Spills should be contained and cleaned up immediately using appropriate absorbents and disposal methods to minimize environmental impact.

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B2B Procurement Guide

When procuring 2,4-Dichlorophenol, industrial buyers should prioritize suppliers with verified certifications and compliance with local and international regulations. Key factors to consider include purity levels (typically 98-99%), packaging options (e.g., drums or bulk containers), and transportation logistics. Price negotiations should account for order volume, with discounts commonly available for bulk purchases. Buyers should also assess the supplier's track record for reliability and quality control. Due to the compound's toxicity, ensure that the supplier provides adequate safety data sheets (SDS) and handling guidelines. Long-term contracts may offer price stability and supply consistency.

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