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What different in desiccant of pharma desiccant packaging

Carrie May 02,2019 Share this post:

The pharma desiccant packaging is mainly controlled by the combination of good sealing property and desiccant, and the number of water molecules in the package is to reach the dry mother. The moisture-proof packaging mainly places the desiccant in the bottle cap or in a bag form. In the first way, it is possible to effectively prevent the drug from directly contacting the desiccant, and the second is not.

effervescent tablet packaging

Desiccants used in desiccant packaging can be generally divided into two major categories, physical adsorption and chemical adsorption, for pharmaceutical or food products, mainly silica gel desiccants and molecular sieves.

Silica gel desiccant The main component silica gel desiccant is a highly active adsorbent material, usually prepared by reacting sodium silicate and sulfuric acid, and undergoing a series of post-treatment processes such as aging and acid foam. Silica gel is an amorphous substance with a chemical formula of mSiO2. nH2O. It is insoluble in water and any solvent, non-toxic and tasteless, chemically stable, and does not react with any substance except strong alkali and hydrofluoric acid.

Molecular sieve A synthetic hydrated aluminosilicate (zeolite) or natural zeolite with a screening molecular action. Its chemical formula (M'2M)O·Al2O3·xSiO2·yH2O, M′, M are monovalent and divalent cations such as K+, Na+ and Ca22+, Ba22+, and the like, respectively. It has a number of pores with uniform pores and well-arranged pores in the structure. Molecular sieves of different pore sizes separate molecules of different sizes and shapes.


The proportion of desiccant in the pharma desiccant packaging should be determined according to the characteristics of the drug. The silica gel desiccant can effectively control the amount of water molecules for a long time; the molecular sieve can quickly absorb water molecules. According to the properties of the two desiccants, the appropriate ratio of the characteristics of the drug and the storage environment have been used to achieve a better moisture-proof effect.

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