4'-Aminoacetophenone Hydrochloride is primarily used in organic synthesis as an intermediate for the production of various pharmaceuticals and fine chemicals. It serves as a key building block in the synthesis of compounds with potential therapeutic applications, such as anti-inflammatory and analgesic agents. Additionally, it is utilized in the development of dyes and pigments due to its aromatic amine structure, which allows for the creation of colorants with specific properties. In research, it finds application as a reagent in chemical reactions to introduce the aminoacetophenone moiety into more complex molecules. Its hydrochloride form enhances stability and solubility, making it suitable for use in aqueous reaction conditions.