Microcrystalline cellulose (MCC) is a purified, partially depolymerized cellulose. It is commonly used as a binder, disintegrant, and filler in pharmaceutical tablets [1]. MCC is derived from wood pulp or cotton linters and is available in various grades with different particle sizes and moisture content, influencing its flow and compressibility properties [2].
What is microcrystalline cellulose used for in tablets?
In tablet manufacturing, microcrystalline cellulose serves multiple critical functions. Its primary roles include acting as a binder, which helps hold the tablet ingredients together, and as a disintegrant, promoting the tablet's breakdown in the body to release the active pharmaceutical ingredient [1]. It also functions as a filler, adding bulk to low-dose formulations to create tablets of a manageable size [2]. Different grades of MCC offer varying performance characteristics, such as improved flow or compressibility, to suit specific formulation needs [2].
How is microcrystalline cellulose made?
The production of microcrystalline cellulose involves a process of acid hydrolysis of cellulose. This method breaks down the crystalline regions of cellulose, yielding a fine, white, odorless powder. The specific conditions of the hydrolysis, such as acid concentration and reaction time, determine the particle size and other properties of the resulting MCC [1][2].
What are the different types of microcrystalline cellulose?
Microcrystalline cellulose is available in various grades that differ in particle size, density, and moisture content. These variations affect its performance in tableting, with some grades offering enhanced flowability or compressibility. Manufacturers often provide specific recommendations for MCC grade selection based on the intended application and other excipients in the formulation [2].
Can microcrystalline cellulose be used in other applications besides pharmaceuticals?
While widely used in pharmaceuticals, microcrystalline cellulose also finds applications in other industries. It is used as an additive in food products as an emulsifier, stabilizer, and anti-caking agent. In cosmetics, it functions as an absorbent and opacifier. It is also used in dietary supplements and as a component in some industrial applications [1][2].
Are there alternatives to microcrystalline cellulose for tablet binders and fillers?
Yes, several alternative excipients can be used as binders and fillers in tablet formulations. These include lactose, starches, dibasic calcium phosphate, and various polymeric binders like povidone and hydroxypropyl methylcellulose. The choice of alternative depends on factors such as compatibility with the active ingredient, desired tablet properties, and manufacturing process [2].