Methyl-beta-cyclodextrin

Updated: 2026-09-13

Overview

Methyl-beta-cyclodextrin (MβCD) is a derivative of beta-cyclodextrin, chemically modified by methylation to enhance its solubility and inclusion complex-forming capabilities. It is widely used in industries such as pharmaceuticals, food, and cosmetics due to its ability to improve the stability and bioavailability of hydrophobic compounds. Cyclodextrins are cyclic oligosaccharides with a hydrophobic cavity and hydrophilic exterior, making them ideal for encapsulating non-polar molecules. MβCD's methylation increases its water solubility compared to unmodified beta-cyclodextrin, expanding its utility in formulations where solubility is a critical factor.

Physical and Chemical Properties

Methyl-beta-cyclodextrin is a white to off-white crystalline powder with a molecular weight of approximately 1310 g/mol. It is highly soluble in water, which distinguishes it from its parent compound, beta-cyclodextrin, which has limited water solubility. MβCD does not have a defined melting point as it decomposes upon heating. The compound's key feature is its ability to form inclusion complexes with hydrophobic molecules, enhancing their solubility and stability. This property is leveraged in drug delivery systems to improve the bioavailability of poorly soluble active pharmaceutical ingredients (APIs). The methylation also reduces its hemolytic activity compared to unmodified cyclodextrins, making it safer for biomedical applications.

Main Applications

In the pharmaceutical industry, MβCD is used to solubilize and stabilize drugs, particularly those with poor water solubility. It is a common excipient in oral and injectable formulations, where it enhances drug delivery and efficacy. For example, it is used in antifungal and anticancer drugs to improve their therapeutic performance. Beyond pharmaceuticals, MβCD finds applications in the food industry as a flavor encapsulant and stabilizer. In cosmetics, it is used to enhance the delivery of active ingredients in skincare products. Additionally, it serves as a cholesterol-depleting agent in biochemical research, particularly in studies involving lipid rafts and membrane biology.

Safety and Storage

Methyl-beta-cyclodextrin is generally recognized as safe (GRAS) for use in food and pharmaceutical applications. However, handling should follow standard laboratory safety protocols, including the use of gloves and eye protection to avoid irritation. Inhalation of dust should be minimized. Storage conditions are critical to maintaining the stability of MβCD. It should be kept in a cool, dry place, sealed tightly to prevent moisture absorption. Exposure to light should also be limited to avoid degradation. Proper storage ensures the material retains its efficacy and shelf life, typically up to two years when stored correctly.

B2B Procurement Guide

When procuring MβCD, buyers should prioritize suppliers that provide certificates of analysis (CoA) to verify purity, which typically ranges from 97% to 99%. Pharmaceutical-grade MβCD may require additional certifications, such as USP or EP compliance, depending on the intended use. Bulk purchasing often offers cost advantages, but buyers should confirm batch-to-batch consistency to ensure uniformity in industrial applications. Lead times and supplier reliability are also important considerations, especially for time-sensitive projects. Establishing long-term relationships with reputable suppliers can mitigate risks associated with supply chain disruptions.