Description

3,6-Dibromophthalic Anhydride is a halogenated aromatic anhydride serving as a versatile and high-purity synthetic intermediate. This compound matters for its role in introducing bromine functionality and the reactive anhydride group into complex molecular architectures, enabling the synthesis of advanced materials and active pharmaceutical ingredients. It is primarily needed by R&D chemists and process engineers in the pharmaceutical, agrochemical, and specialty polymer industries for constructing heat-resistant polymers, liquid crystals, and pharmaceutical scaffolds.

Application

• Pharmaceutical Intermediate: Key building block for the synthesis of active pharmaceutical ingredients (APIs), particularly those requiring brominated aromatic cores.
• Polymer & Resin Synthesis: Used in the production of high-performance polymers, including polyimides and polyesters, where it imparts flame retardancy and enhanced thermal stability.
• Agrochemical Synthesis: Intermediate in the manufacture of advanced herbicides, fungicides, and other crop protection agents.
• Liquid Crystal Materials: Serves as a precursor in the synthesis of brominated components for liquid crystal displays (LCDs).
• Dye & Pigment Manufacturing: Intermediate for creating brominated phthalocyanine dyes and other complex colorants.
• Cross-linking Agent: Utilized in epoxy and other resin systems to introduce cross-links, improving mechanical and chemical resistance.
• Organic Synthesis & Research: A valuable reagent in academic and industrial laboratories for exploring new organic reactions and material properties.

Basic Information

Product Name	3,6-Dibromophthalic Anhydride
CAS No.	25834-16-6
Molecular Formula	C8H2Br2O3
Molecular Weight	313.91 g/mol
Synonyms	3,6-Dibromo-1,3-dihydro-1,3-dioxoisobenzofuran; 3,6-Dibromophthalic acid anhydride; 4,5-Dibromophthalic Anhydride; 1,3-Dihydro-3,6-dibromo-1,3-dioxoisobenzofuran; NSC 403107; Phthalic Anhydride, 3,6-dibromo-; 3,6-Dibromoisobenzofuran-1,3-dione
EINECS	Contact for details

Quality Control

Our 3,6-Dibromophthalic Anhydride is manufactured under a strict quality management system. Each batch undergoes rigorous analytical testing, including HPLC, NMR, and titration methods, to ensure high purity and consistency. Certificates of Analysis (COA) detailing purity, identity, and impurity profiles are provided with every shipment and are available upon request to support your quality assurance protocols.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at room temperature (15-25°C). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept sealed under dry, inert conditions to prevent hydrolysis and degradation.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Melting Point	Contact for details
Loss on Drying	≤ 0.5%
Heavy Metals (as Pb)	≤ 20 ppm
Residue on Ignition	≤ 0.1%

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