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4-(3-aminophenyl)butanoic acid hydrochloride; CAS No.: 91843-18-4; 4-(3-aminophenyl)butanoic acid hydrochloride. PROPERTIES: This compound is a white crystalline powder with molecular formula C11H14N O2 {HCl. It has molecular weight of 226.70 g/mol and melting point around 195-200 C. The substance is moderately soluble in water and ethanol but insoluble in non-polar solvents. Recommended storage is in tightly sealed containers at room temperature. Being a hydrochloride salt of amine, it presents typical hazards including respiratory tract irritation; use in well-ventilated areas is recommended. APPLICATIONS: In pharmaceutical manufacturing, this compound serves as intermediate for producing antipsychotic medications. The aminophenyl group contributes to dopamine receptor antagonism while the butanoic acid provides metabolic handle for controlled bioavailability (Journal of Medicinal Chemistry). In materials science, it acts as building block for producing conductive polymers where the amino group is oxidized to form conjugated systems (Synthetic Metals). Additionally, it functions as starting material for producing fluorescent probes where the amino group is modified with fluorophores through acylation or sulfonation reactions (Analytical Chemistry). These applications leverage its combination of aromatic amine and carboxylic acid functionalities for constructing pharmaceuticals and functional materials.