2-(4-Aminophenyl)-1H-benzimidazol-5-amine (APBIA) CAS 7621-86-5

Name: 2-(4-Aminophenyl)-1H-benzimidazol-5-amine (APBIA) CAS 7621-86-5
Brand: Aure Chemical
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Synonyms: 2-(4-Aminophenyl)-5-aminobenzimidazole; 5-Amino-2-(4-aminophenyl)benzimidazole; 1H-Benzimidazol-5-amine, 2-(4-aminophenyl)-; 1H-Benzimidazol-6-amine, 2-(4-aminophenyl)-; 2-(4-Aminophenyl)-1H-benzo[d]imidazol-5-amine; 5(6)-Amino-2-(p-aminophenyl)benzimidazole; 

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2-(4-Aminophenyl)-1H-benzimidazol-5-amine (APBIA), CAS 7621-86-5, is a heteroaromatic diamine monomer based on a benzimidazole core structure. It is characterized by good solubility in organic solvents, structural stability, and dual amino functionality, supporting its use as an intermediate in polymer synthesis and functional material research.

Basic Information of APBIA

Product Name	2-(4-Aminophenyl)-1H-benzimidazol-5-amine
Abbreviation	APBIA
CAS Number	7621-86-5
Molecular Formula	C13H12N4
Molecular Weight	224.26 g/mol
Appearance	Pale beige to pale brown solid
Purity	≥99%
Package	1kg/bottle, 20kg/drum, or customized
Molecular Structure

Key Properties

High thermal stability associated with benzimidazole heterocycle
Dual amino functionality enabling polymerization or crosslinking
Good chemical resistance in demanding environments
Potential for incorporation into functional polymer membranes
Moderate polarity supporting intermolecular and interfacial interactions

Typical Application Contexts of APBIA

Polyimide and Heterocyclic Polymer Chemistry: Investigated as a diamine component in polyimide and related heterocyclic polymer systems where rigidity and thermal stability are desired, including specialty functional polymer materials .

Functional Membrane Materials Research: Studied in polymer membranes containing benzimidazole units, such as proton-conducting or hybrid membrane systems, at the material research and formulation level.

Advanced Polymer Material Studies: Explored as an intermediate in polymer modification and structure–property investigations related to electronic and insulating polymer research .

Organic and Medicinal Chemistry Research: Utilized as a heterocyclic building block in laboratory-scale organic synthesis and pharmaceutical research contexts, without implying clinical or commercial drug applications.

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