Description

Dimethyl Dihydrogen 4,4'-Carbonylbisphthalate is a high-purity organic intermediate and monomer of significant industrial importance. This compound serves as a critical building block in the synthesis of advanced polymers and specialty chemicals, valued for its precise molecular structure and reactivity. It is primarily sought after by manufacturers in the polymer, pharmaceutical, and fine chemical sectors for research, development, and production processes.

Application

• Polymer Synthesis: A key monomer for producing high-performance polyesters, polyimides, and other engineering plastics with enhanced thermal and mechanical properties.
• Pharmaceutical Intermediates: Used in the research and synthesis of active pharmaceutical ingredients (APIs) and complex drug molecules.
• Liquid Crystal Polymers (LCPs): Serves as a precursor in the manufacture of LCPs used in electronics and high-temperature applications.
• Specialty Coatings & Adhesives: Imparts durability and chemical resistance in advanced coating formulations and high-strength adhesives.
• Fine Chemical Production: Acts as a versatile intermediate for creating complex organic compounds in research and industrial chemistry.
• Cross-linking Agent: Utilized to modify and improve the network structure and performance of various polymer systems.

Basic Information

Product Name	Dimethyl Dihydrogen 4,4'-Carbonylbisphthalate
CAS No.	36928-64-0
Molecular Formula	C19H14O9
Molecular Weight	386.31 g/mol
Synonyms	4,4'-Carbonylbis(phthalic acid) dimethyl ester; Dimethyl 4,4'-(carbonylbis(oxy))diphthalate; 4,4'-Carbonylbis(1,2-benzenedicarboxylic acid) dimethyl ester; Bis(4-carbomethoxyphthalic anhydride) ether; DMTBP; Tetramethyl ester of 4,4'-carbonylbisphthalic acid
EINECS	Contact for details

Quality Control

Our Dimethyl Dihydrogen 4,4'-Carbonylbisphthalate is manufactured under a strict quality management system to ensure batch-to-batch consistency and high purity. Production adheres to current Good Manufacturing Practices (cGMP) where applicable. Each lot is accompanied by a comprehensive Certificate of Analysis (COA) detailing purity, identity, and impurity profiles. We support compliance with global regulatory standards, including REACH.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at a controlled room temperature (typically 15-25°C). Keep away from strong alkalis and incompatible organic solvents. The container must be kept tightly sealed to protect the contents from moisture.

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	≤ 10 ppm
Residual Solvents (GC)	Meets ICH guidelines

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