3-Bromo-5-methylbenzonitrile, identified by its CAS number 124289-21-0, is a significant organic intermediate that plays a crucial role in various chemical synthesis processes. Its specific molecular structure and reactive functional groups make it a versatile building block for chemists engaged in complex molecular design and synthesis. This article explores its properties, typical synthetic routes, and provides insights for sourcing this valuable compound.

Chemical Profile of 3-Bromo-5-methylbenzonitrile

The chemical identity of 3-Bromo-5-methylbenzonitrile is defined by its formula C8H6BrN and a molecular weight of 196.04. It is typically presented as a solid, often appearing in shades of white to off-white. Key physical parameters include:

  • Melting Point: Generally falls within the range of 57-58.5℃.
  • Boiling Point: Approximately 256.1±20.0℃ at standard atmospheric pressure.
  • Density: Around 1.51±0.1 g/cm³.
  • Flash Point: Approximately 108.7±21.8℃.

These properties are critical for understanding its handling, storage, and reaction conditions. Its stability at room temperature when sealed and dry, as recommended by many suppliers, is also an important factor for laboratory storage.

Synthesis and Applications

The synthesis of 3-Bromo-5-methylbenzonitrile often involves the dehydration of its corresponding benzamide. A common method described in chemical literature involves treating 3-bromo-5-methylbenzamide with phosphorus pentoxide in a suitable solvent under reflux conditions. The product is then isolated and purified, often through chromatography, yielding the desired benzonitrile with a good percentage yield.

The primary application of 3-Bromo-5-methylbenzonitrile is as an intermediate in organic synthesis, particularly for creating substituted aromatic compounds. Its structure allows for further modifications, such as Suzuki couplings or other cross-coupling reactions, to introduce more complex moieties. This makes it highly valuable in the development of:

  • New pharmaceutical candidates: Researchers utilize it to construct drug molecules with specific pharmacological activities.
  • Agrochemicals: Its scaffold can be incorporated into pesticides or herbicides.
  • Specialty chemicals: For niche applications in various industries requiring tailored chemical properties.

Sourcing Strategies for Procurement Managers

When seeking to purchase 3-Bromo-5-methylbenzonitrile, procurement managers should leverage online chemical marketplaces and directly contact manufacturers. Key steps involve:

  1. Identify Suppliers: Look for suppliers with a demonstrated history of providing organic intermediates, preferably with specialization in benzonitrile derivatives.
  2. Request Quotes: Obtain detailed quotes that include product specifications, pricing for different quantities (e.g., 1g, 5g, bulk), lead times, and shipping costs.
  3. Verify Quality: Ensure the supplier provides a Certificate of Analysis (CoA) with each order and offers product samples for your internal quality checks.
  4. Assess Reliability: Consider the supplier's reputation, customer service, and ability to provide consistent product quality and timely delivery.

Many leading chemical suppliers based in China offer 3-Bromo-5-methylbenzonitrile, often at competitive prices due to manufacturing efficiencies. Brands like Alfa Chemistry, AK Sci, and SynQuest Labs are frequently listed as sources for this compound, highlighting the global availability.

For businesses looking for a reliable 3-Bromo-5-methylbenzonitrile manufacturer, prioritizing those with strong quality control and a commitment to customer service will yield the best results. By understanding the chemical's profile and adopting a systematic sourcing approach, you can secure a consistent supply of this essential intermediate for your research and production needs.