Pharmaceutical Excipient Dextrin: Basic Characteristics, Core Applications and Future Trends

I. Basic Characteristics and Classification

1. Chemical Nature: It is a glucose polymer connected by α-(1→4) and a small amount of α-(1→6) glycosidic bonds.
2. Main Types
   • White Dextrin: With a low degree of hydrolysis, it is a white powder with good water - solubility, used for filling and binding.
   • Yellow Dextrin: Having a medium degree of hydrolysis, it is light yellow in color, with stronger viscosity and binding force, suitable for coating and sustained - release materials.
   • Maltodextrin: With a high degree of hydrolysis, it has good solubility and is used in oral preparations.
3. Key Properties: It appears as a white to slightly yellow powder, is easily soluble in hot water, has viscosity and film - forming properties, is chemically stable, and is safe with no obvious toxicity.

II. Core Pharmaceutical Applications

1. Oral Solid Preparations: It acts as a filler, binder, disintegrant and carrier material to ensure the quality and efficacy of the preparations.
2. Liquid and Semi - solid Preparations: It serves as a thickener, stabilizer and emulsifying adjuvant to improve the stability and quality of the preparations.
3. Novel Drug Delivery Systems: It is used for sustained - release and controlled - release, solubilization of poorly - soluble drugs, and targeted local drug delivery.

III. Future Development Directions

1. Functionalization and High - end Development: Precisely control the structure, expand the application of cyclodextrin derivatives, and adopt technologies such as micronization.
2. Green Manufacturing and Quality Upgrade: Achieve continuous and intelligent production, use low - carbon raw materials, and establish a traceability system.
3. Market and Application Expansion: Penetrate emerging markets, adapt to new dosage forms, and expand cross - border applications.