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

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4-Aminobenzoic acid 4-aminophenyl ester (APAB), CAS 20610-77-9, is an aromatic diamine monomer featuring an ester linkage that contributes to molecular rigidity and controlled reactivity. Within the broader category of polyimide diamine monomers , APAB is typically discussed in terms of how ester-bridged aromatic structures influence thermal stability, mechanical reinforcement, and chemical resistance in polymer backbones.

Basic Information of APAB

Product Name	4-Aminobenzoic acid 4-aminophenyl ester
Abbreviation	APAB
CAS Number	20610-77-9
Molecular Formula	C13H12N2O2
Molecular Weight	228.25 g/mol
Appearance	Light yellow to brown powder or crystalline solid
Purity	≥99%
Package	1kg/bottle, 20kg/drum, or customized
Molecular Structure

Application Contexts of APAB

• Specialty and Functional Polyimides: APAB is often referenced in specialty functional polyimide material discussions , where ester-linked diamines are evaluated for balancing rigidity and processability.

• High-Temperature Polymer Systems: Its aromatic backbone aligns with material considerations outlined in high-temperature polyimide application studies , particularly at the level of polymer structure–property relationships.

• Electronics-Related Polyimide Materials: Mechanical stability and thermal endurance place APAB within the scope of electronics and semiconductor polyimide application contexts , without implying specific end-device use.