Pharmaceutical packaging desiccant saturated moisture absorption rate in the environment of relative humidity less than 75%, take out 5 finished bottle caps from the same packaging bag, the precision is heavy, W0, put the cap into the temperature of 23 degrees ± 2 degrees, the relative humidity is In the 75%±5% constant temperature and humidity chamber, take out after the 8th day, weigh W1, carefully remove the cardboard, and take out the moisture-absorbing desiccant: wipe the cardboard and bottle cap clean and combine the weighing W2. The desiccant of the silica gel, the macromolecular sieve and the mixture of the two (4:6) desiccant was not less than 30%, 19%, and 24%, respectively, as calculated by the following formula.
The desiccant has a moisture absorption rate in an environment with a relative humidity of less than 60%. Five finished caps are taken from the same bag and the weight is heavy. The cap is placed at a temperature of 25 degrees ± 2 degrees and the relative humidity is 60%. In a ±5% constant temperature and humidity chamber, take it out after hours, weigh W1, carefully remove the cardboard, and take out the moisture-absorbing desiccant: wipe the cardboard and cap clean and combine the weighing W2. The saturated moisture absorption rate of the desiccant of silica gel, macromolecular sieve and a mixture thereof (4:6) was not less than 3%, 4.5%, 3.5%, respectively, as calculated by the following formula.
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