Description

1,3-Benzenedicarboxylic Acid,5,5'-(Dimethylsilylene)Bis- is a specialized organosilicon-functionalized aromatic dicarboxylic acid, serving as a high-value building block for advanced material synthesis. Its unique structure, featuring a central dimethylsilylene bridge between two isophthalic acid moieties, enables precise control over polymer architecture and material properties. This compound is essential for researchers and manufacturers in the polymer, specialty chemical, and advanced material sectors seeking to develop novel siloxane-aryl hybrid systems with tailored thermal, mechanical, and surface characteristics.

Application

• High-Performance Polymer Synthesis: A key monomer for producing novel polyesters, polyamides, and polyimides with integrated siloxane segments, enhancing thermal stability, flexibility, and gas permeability.
• Advanced Material Modifiers: Used as a chain extender or cross-linking agent to introduce silicon into polymer backbones, improving material properties like weatherability, hydrophobicity, and adhesion.
• Metal-Organic Framework (MOF) Precursor: Serves as a versatile organic linker for constructing hybrid porous materials with potential applications in gas storage, separation, and catalysis.
• Specialty Resins and Coatings: Incorporated into resin formulations to develop coatings with enhanced chemical resistance, low surface energy, and improved durability for automotive, aerospace, and electronic applications.
• Pharmaceutical & Agrochemical Intermediates: Utilized in the synthesis of complex molecules where the silicon-bridged aromatic core imparts specific biological activity or metabolic stability.
• Adhesive and Sealant Formulations: Acts as a functional additive to improve the compatibility, curing profile, and final performance of high-end silicone hybrid adhesives and sealants.

Basic Information

Product Name	1,3-Benzenedicarboxylic Acid,5,5'-(Dimethylsilylene)Bis-
CAS No.	1171890-34-8
Molecular Formula	C18H18O8Si
Molecular Weight	390.42 g/mol
Synonyms	5,5'-(Dimethylsilylene)diisophthalic Acid; Bis(3-carboxy-5-isophthalic acid)dimethylsilane; Dimethylsilanediylbis(5-isophthalic acid); 1,3-Benzenedicarboxylic acid, 5,5'-(dimethylsilylene)bis-; Silicon-bridged isophthalic acid dimer; Organosilicon dicarboxylic acid monomer; Contact for additional synonyms.
EINECS	Contact for details

Quality Control

Our production of 1,3-Benzenedicarboxylic Acid,5,5'-(Dimethylsilylene)Bis- adheres to stringent quality management protocols to ensure batch-to-batch consistency and high purity. Each lot undergoes comprehensive analytical testing, including HPLC for assay and impurity profiling, NMR for structural confirmation, and Karl Fischer titration for moisture content. A detailed Certificate of Analysis (COA) documenting all specifications is provided with every shipment to support your quality assurance and R&D processes.

Storage

Preserve in a tightly closed container, protected from light. Due to its hygroscopic (moisture-sensitive) nature, store under dry, inert conditions (e.g., nitrogen atmosphere) in a cool, dry place. Recommended storage temperature is 2-8°C for long-term stability. Keep away from strong acids and organic solvents.

Specification

Item	Specification
Appearance	White to off-white powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 97.0%
Water Content (KF)	≤ 1.0%
Residue on Ignition	≤ 0.1%
Heavy Metals (as Pb)	≤ 10 ppm

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