The chemical intermediate 455-84-5, more commonly known as 4-Fluoro-3-methylbenzoyl chloride, plays a significant role in various advanced chemical syntheses. For purchasing managers and R&D scientists, a thorough understanding of its chemical properties and the reliability of its suppliers is crucial for successful procurement. This guide offers insights into these aspects, with a focus on sourcing from China.

Understanding the Chemical Properties of 455-84-5

4-Fluoro-3-methylbenzoyl chloride (CAS 455-84-5) is characterized by its reactive acyl chloride functional group and the presence of a fluorine atom on the aromatic ring. These features dictate its behavior and applications:

• Reactivity: The acyl chloride group is highly electrophilic, making it readily susceptible to nucleophilic attack. This property is fundamental to its use as an intermediate in acylation reactions. It reacts vigorously with water, alcohols, and amines.
• Moisture Sensitivity: Due to its reactivity with water, 455-84-5 is considered moisture-sensitive. Proper storage in dry conditions and handling under inert atmosphere (like nitrogen) are essential to maintain its integrity and prevent degradation.
• Physical Appearance: It is typically described as a colorless oil.
• Corrosive Nature: Like many acyl chlorides, it can be corrosive and should be handled with appropriate personal protective equipment (PPE), including gloves, eye protection, and protective clothing. Safety Data Sheets (SDS) provide detailed hazard information.
• Boiling Point: Literature often cites a boiling point in the range of 129-133 °C at 17 mm Hg.

These properties underscore its utility in organic synthesis, particularly for forming ester and amide bonds, which are ubiquitous in pharmaceutical and agrochemical molecules. Its fluorinated nature can also impart desirable characteristics such as increased metabolic stability or lipophilicity to the final product.

Evaluating Chinese Suppliers for 455-84-5

When seeking to buy 4-Fluoro-3-methylbenzoyl chloride from China, discerning reliable suppliers is a critical step. Here are key criteria to consider:

• Purity and Quality Standards: Verify that the supplier can consistently provide the required purity level (often 97% or 99%). Request Certificates of Analysis (CoA) for recent batches.
• Manufacturing Experience: Prioritize manufacturers with a proven track record in producing similar acyl chloride intermediates. Experience often translates to better process control and product consistency.
• Regulatory Compliance: Ensure the supplier adheres to relevant industry standards and has proper documentation, including SDS.
• Communication and Responsiveness: Effective communication is vital. Look for suppliers who respond promptly to inquiries and provide clear, detailed information. This is especially important when requesting a price quote or discussing technical specifications.
• Logistics and Export Capabilities: Confirm they have experience in international shipping and can handle the complexities of exporting chemicals, including proper packaging for moisture-sensitive and corrosive materials.

Price Inquiry Tips for 455-84-5

To obtain the most accurate price information, when you submit an inquiry to a Chinese manufacturer or supplier, include:

• The exact CAS number (455-84-5).
• The desired purity level.
• The total quantity you intend to purchase.
• Your preferred packaging.
• Your delivery location and timeframe requirements.

This detailed information will enable the supplier to provide a precise quotation and confirm their ability to meet your needs.

In conclusion, a solid understanding of 455-84-5's chemical properties, combined with a diligent approach to evaluating suppliers, is essential for a successful procurement strategy. By focusing on quality, reliability, and clear communication when requesting pricing information, businesses can ensure they secure a dependable supply of this critical chemical intermediate.