3-Bromophthalic Anhydride (CAS 82-73-5), chemically known as 4-Bromoisobenzofuran-1,3-dione, is a critical intermediate with a well-defined set of properties that dictate its utility in chemical synthesis. Understanding these characteristics is vital for chemists and procurement specialists who rely on this compound for their research and production needs. As a key building block, its consistent availability and quality are paramount, making it essential to know where to source it effectively from reputable suppliers.

Physically, 3-Bromophthalic Anhydride typically presents as an off-white to white powder. This appearance is characteristic of many anhydrous organic compounds, and variations in shade can sometimes indicate slight differences in purity or the presence of trace impurities. Its solid form at room temperature simplifies handling and storage, provided it is kept under appropriate conditions. A key specification that buyers look for is its purity, with levels of ≥98.0% being standard for most synthetic applications. Moreover, a low moisture content, typically ≤0.1%, is crucial to prevent hydrolysis of the anhydride group, which would render it less reactive and alter its intended function.

Chemically, the anhydride functionality makes 3-Bromophthalic Anhydride highly reactive towards nucleophiles, facilitating ester and amide formation. The bromine substituent on the aromatic ring adds another dimension, allowing for participation in various cross-coupling reactions or electrophilic aromatic substitutions. This dual reactivity profile makes it a versatile tool for synthesizing complex organic molecules, including pharmaceuticals, agrochemicals, and specialized polymers. When you consider where to buy 3-Bromophthalic Anhydride, ensure the supplier emphasizes these reactive properties.

Stability is another critical aspect. While generally stable under dry conditions, 3-Bromophthalic Anhydride is sensitive to moisture. Therefore, proper storage in tightly sealed containers, preferably under an inert atmosphere and in a cool, dry place, is recommended to maintain its integrity. Its melting point, typically around 103-105°C, also provides an indicator of its purity and physical state.

For procurement managers and researchers, identifying a reliable manufacturer or supplier of 3-Bromophthalic Anhydride is a strategic advantage. Leading chemical suppliers, particularly those based in China, offer this intermediate with guaranteed specifications and competitive prices. Accessing such resources ensures that you can consistently obtain high-quality material for your ongoing projects. Prioritizing suppliers who provide detailed technical data and responsive customer support will streamline your procurement process and contribute to the overall success of your chemical synthesis endeavors.