Moisture absorbent additives are often needed in situations where hydrophilic active pharmaceutical ingredients (API) are processed. These kind of API’s (e.g. amino acids) absorb humidity from the ambient air. Therefore the particles of other ingredients in your tablet mass will stick to the API. Clumping inside the tableting mass will lead to an inhomogeneity and fluctuations of the tablethardness during the compaction process.

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