Description

3-Bromophthalic Anhydride is a versatile brominated aromatic anhydride used as a key synthetic intermediate in advanced organic chemistry. Its value lies in its ability to introduce both a bromine substituent and a reactive anhydride moiety into target molecules, enabling the construction of complex chemical architectures. This compound is essential for researchers and manufacturers in the pharmaceutical, agrochemical, and specialty polymer industries who require high-purity building blocks for active ingredient and advanced material synthesis.

Application

• Pharmaceutical Intermediate: A crucial building block in the synthesis of active pharmaceutical ingredients (APIs), particularly for compounds with phthalimide or phthalic acid-derived structures.
• Agrochemical Synthesis: Used in the production of advanced herbicides, fungicides, and plant growth regulators where the bromine atom facilitates further functionalization.
• Polymer & Material Science: Serves as a monomer or cross-linking agent for the development of high-performance polymers, including polyimides, epoxy resins, and flame-retardant materials.
• Dye & Pigment Manufacturing: Acts as a precursor for brominated anthraquinone and phthalocyanine dyes and pigments, imparting specific color and stability properties.
• Organic Synthesis Reagent: Employed in academic and industrial R&D for constructing complex organic molecules, including heterocycles and liquid crystals.
• Ligand & Chelating Agent Precursor: Used to synthesize specialized ligands for catalysis and metal complexation applications.

Basic Information

Product Name	3-Bromophthalic Anhydride
CAS No.	82-73-5
Molecular Formula	C8H3BrO3
Molecular Weight	227.01 g/mol
Synonyms	3-Bromophthalic Acid Anhydride; 3-Bromoisobenzofuran-1,3-dione; 1,3-Dioxo-1,3-dihydroisobenzofuran-5-bromide; 5-Bromoisobenzofuran-1,3-dione; Bromophthalic Anhydride; 5-Bromophthalic Anhydride; 3-BPA
EINECS	201-434-4

Quality Control

Our 3-Bromophthalic Anhydride is manufactured under strict quality management systems. Every batch undergoes rigorous analytical testing, including HPLC, NMR, and titration methods, to ensure high purity and batch-to-batch consistency. A comprehensive Certificate of Analysis (COA) detailing identity, purity, and impurity profiles is provided with each shipment to support your quality assurance and regulatory compliance needs.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at room temperature (15-25°C). This material is hygroscopic (moisture-sensitive); ensure containers are sealed tightly after each use to prevent degradation due to moisture absorption.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Melting Point	118 - 122 °C
Loss on Drying	≤ 0.5%
Heavy Metals (as Pb)	≤ 20 ppm

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.