Hydroxypropyl beta cyclodextrin

CAS Number
128446-35-5
EC Number
603-269-8
Abbreviation
HPBCD

What is Hydroxypropyl beta cyclodextrin?

Hydroxypropyl beta cyclodextrin (CAS 128446-35-5), also known as hydroxypropyl betadex and abbreviated HPBCD, is a modified cyclic oligosaccharide. It is used in pharmaceutical, food, and cosmetic manufacturing.

Where is Hydroxypropyl beta cyclodextrin used?

  • Pharmaceutical drug formulation: enables injectable, oral, and nasal delivery systems for APIs with low aqueous solubility
  • Cosmetics and personal care: stabilizes fragrance compounds, vitamins, and botanical extracts in creams, serums, and rinse-off products
  • Food and nutraceuticals: encapsulates flavors, colorants, and functional ingredients to mask off-notes or protect against oxidative degradation
  • Biotechnology and life sciences: cholesterol-extracting agent in cell membrane research and solubilizer in assay development
  • Its primary commercial function is encapsulating poorly soluble or unstable active ingredients within its cavity, improving solubility, bioavailability, and shelf stability.

Commercial specifications

  • Pharmaceutical-grade specifications include USP, Ph. Eur., and BP
  • Degree of substitution is part of the product specification
  • Food-grade material is commercially available for flavor and nutraceutical applications requiring high purity and stability

Other Names (Synonyms)

Hydroxypropyl betadex|β-cyclodextrin, 2-hydroxypropyl ethers|Hydroxypropyl cyclodextrin|Hydroxypropyl-beta-cyclodextrin|HPBCD

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What are the physical properties of Hydroxypropyl beta cyclodextrin?

Melting Point 281.1 °C
Boiling Point 400°C
Density 1.05 at 20.3℃
Appearance White to slightly yellow powder
Color White to slightly yellow
Form solution (clear, colorless)
Water Solubility Soluble in water.
Refractive Index 125 ° (C=1, H2O)
pH 5.0-7.0 (20g/L in H2O)
Log P -4 at 20℃

Which trade and regulatory codes apply to Hydroxypropyl beta cyclodextrin?

HS Code 29400090
Storage Class 11 - Combustible Solids
WGK (Germany) 3
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