Overview
4-Bromo-2-methylaniline is an organic compound belonging to the class of aromatic amines. It is structurally characterized by a bromine atom at the para position (4-position) and a methyl group at the ortho position (2-position) relative to the amino group on the benzene ring. This compound is primarily used as an intermediate in the synthesis of more complex molecules, particularly in the pharmaceutical and agrochemical industries. Its reactivity makes it a valuable building block for coupling reactions, such as the synthesis of azo dyes, and for the preparation of active pharmaceutical ingredients (APIs). The presence of both bromine and the amino group allows for further functionalization, enabling chemists to tailor the molecule for specific applications.
Physical and Chemical Properties
4-Bromo-2-methylaniline typically appears as a pale yellow to brown crystalline powder with a distinct amine odor. It has a moderate melting point of around 50-55°C and a boiling point of approximately 250-255°C. The compound is soluble in common organic solvents like ethanol, ether, and acetone but has limited solubility in water due to its hydrophobic aromatic ring. Chemically, it exhibits properties typical of aromatic amines, including susceptibility to electrophilic substitution reactions. The bromine atom enhances its reactivity in nucleophilic substitution reactions, while the amino group can participate in diazotization, a key step in dye synthesis. Stability under normal conditions is good, but it should be protected from strong oxidizers to prevent decomposition.
Main Applications
The primary use of 4-Bromo-2-methylaniline is as an intermediate in the production of pharmaceuticals, where it serves as a precursor for active ingredients in drugs targeting various therapeutic areas. Its bromine substitution makes it particularly useful in cross-coupling reactions, such as Suzuki or Heck reactions, which are common in drug discovery. In agrochemicals, this compound is employed to synthesize herbicides, fungicides, and insecticides. Its aromatic structure and functional groups allow for the creation of compounds with specific biological activities. Additionally, it is a key component in the manufacture of azo dyes, where it contributes to color intensity and stability.
Safety and Storage
4-Bromo-2-methylaniline poses several safety hazards, including toxicity upon ingestion or inhalation and potential skin and eye irritation. Proper personal protective equipment (PPE), such as gloves, goggles, and lab coats, should be worn when handling the compound. Work should be conducted in a fume hood to minimize exposure to vapors or dust. Storage requires a cool, dry environment away from oxidizing agents and direct sunlight. Containers should be tightly sealed to prevent moisture absorption and contamination. In case of spills, absorb with an inert material and dispose of according to local regulations. Emergency procedures should include flushing affected skin or eyes with water and seeking medical attention if exposure occurs.
B2B Procurement Guide
When procuring 4-Bromo-2-methylaniline, prioritize suppliers with certifications such as ISO or GMP to ensure quality and consistency. Key specifications to verify include purity (typically ≥98%), CAS number (583-75-5), and the absence of heavy metals or other contaminants. Bulk purchases often reduce costs, but ensure proper storage capacity to maintain product integrity. Request material safety data sheets (MSDS) and certificates of analysis (CoA) for compliance with regulatory requirements. Lead times may vary, so plan orders in advance, especially for customized quantities or purities. Consider regional suppliers to minimize shipping costs and delays.
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