4-Aminobenzoic acid 4-aminophenyl ester (APAB) CAS 20610-77-9

Name: 4-Aminobenzoic acid 4-aminophenyl ester (APAB) CAS 20610-77-9
Brand: Aure Chemical
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Synonyms: 4-Aminophenyl 4-aminobenzoate; Phenol, 4-amino-, 1-(4-aminobenzoate)

Shandong Aure Chemical Co., Ltd. is one of the leading suppliers of APAB in China and also one of the manufacturers of this product.

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Product Details

APAB CAS 20610-77-9 for Polyimide and Specialty Polymer Synthesis

4-Aminobenzoic acid 4-aminophenyl ester, commonly known as APAB, is an ester-containing aromatic diamine monomer used as a structural building block in high-performance polyimide, polyamide and specialty polymer synthesis. Its aromatic backbone and ester linkage make APAB relevant to polymer systems where molecular rigidity, processability, thermal resistance and mechanical performance need to be balanced.

APAB belongs to the broader category of polyimide diamine monomers and is also part of Aure Chemical’s polyimide diamine monomers supply portfolio. It is typically considered in specialty, processable and heat-resistant polyimide material development, depending on the paired dianhydride, formulation and processing conditions.

Basic Information of APAB

Product Name	4-Aminobenzoic acid 4-aminophenyl ester
Abbreviation	APAB
CAS Number	20610-77-9
Product Type	Ester-containing aromatic diamine monomer
Molecular Formula	C13H12N2O2
Molecular Weight	228.25 g/mol
Appearance	Light yellow to brown powder or crystalline solid
Purity	≥ 99%; final batch data should be confirmed by latest COA
Main Application	Specialty, processable and heat-resistant polyimide synthesis
Package	1 kg/bottle, 20 kg/drum, or customized packaging
Documents	COA, SDS and TDS available upon request
Storage	Keep sealed, dry, and away from moisture
Molecular Structure

Key Features in Polyimide Design

Ester-containing aromatic diamine structure, relevant to specialty and processable polyimide diamine monomers.
Aromatic backbone may support molecular rigidity and thermal resistance depending on the paired dianhydride and polymer architecture.
Ester linkage may help adjust processability, polarity and film-forming behavior in selected specialty polymer systems.
APAB can be considered in specialty functional polyimide development where structural monomer design and polymer performance balance are important.
Final material properties depend on monomer purity, dianhydride selection, solvent system, imidization conditions and polymer processing method.

Pairing APAB with Dianhydride Monomers

In polyimide synthesis, APAB may be evaluated with selected polyimide dianhydride monomers to design specialty, processable and heat-resistant PI systems. Rigid aromatic dianhydrides such as BPDA CAS 2420-87-3 or BTDA CAS 2421-28-5 may support thermal resistance and dimensional stability.

Ether-containing dianhydrides such as ODPA CAS 1823-59-2 may help adjust processability and film-forming behavior, while fluorinated dianhydrides such as 6FDA CAS 1107-00-2 may be considered when optical, dielectric or moisture-related properties are part of the target polymer design.

Application Context of APAB in Polyimide Systems

APAB is typically used as a structural diamine monomer rather than a finished application material. It is commonly discussed in specialty, heat-resistant and processable polyimide material development, where aromatic rigidity and ester-containing structure can influence polymer performance.

Specialty functional polyimide development – ester-containing aromatic diamine selection for advanced polymer research.
Flexible and processable polyimide formulations – processability, film formation and polymer design considerations.
High-temperature polyimide applications – thermal resistance and high-performance polymer environments.
Electronics and semiconductor polyimide applications – insulation, thermal endurance and specialty polymer material requirements.

COA, SDS and Technical Documentation

Aure Chemical can provide COA, SDS, TDS, typical specifications and packaging information for APAB CAS 20610-77-9 upon request. Since APAB is an ester-containing aromatic diamine monomer, final purity, appearance and batch-specific data should be confirmed by the latest COA before order confirmation.

Please share the required purity, target specification, quantity, destination country or port, preferred packaging method and required documents so we can review availability, documentation support and export packing options.

Contact Aure Chemical for APAB documentation and quotation support.