Studies on Water Vapor Absorption through Hard Gelatin Capsules

경(硬)갚셀제(劑)의 흡습(吸濕)에 관(關)한 연구(硏究)

Stability is impaired in capsules in which there is a transfer of water vapor from capsule to the contents of the capsules. The water vapor transfer between AEA-coated capsules and corn starch, magnesium trisilicate in the closed container was examined. Experimental eguilibrium relative humidity after water vapor transfer and estimated values calculated from a formula of these substances were in close agreement with each other.