Crospovidone

Crospovidone is the common name for cross-linked polyvinylpyrrolidone (PVP), a water-insoluble synthetic polymer used as a pharmaceutical disintegrant. It is produced by crosslinking polyvinylpyrrolidone to create a porous, highly absorbent material. In tablet and capsule formulations, crospovidone rapidly wets, swells, and disrupts the dosage form, promoting disintegration and dissolution. The primary action is through capillary action and swelling, which exerts mechanical stress on the tablet matrix. Its disintegration performance is largely pH independent and relatively insensitive to some common formulation variables.

Crospovidone is widely used in direct compression and wet granulation processes. It is favored for fast disintegration, compatibility with a broad range of active ingredients, and its suitability for dry, moisture-sensitive products. The material is available as white to off-white powder or granules, with multiple grades differing in particle size, swelling capacity, and flow properties. It is generally non-ionic and inert, though formulation testing is recommended to evaluate functional performance with a specific API.

Manufacturers supply crospovidone in grades for direct compression, wet granulation, or fast-dissolving formulations. It is not soluble in water and standard organic solvents, and acts as a disintegrant by absorbing water and swelling rather than by dissolution. Storage in a dry place protects its performance.

Regulatory notes: Crospovidone is an established pharmaceutical excipient listed in pharmacopoeial standards in many regions. It is regarded as safe when used within approved specifications and is compatible with a wide range of APIs and excipients.