TY - JOUR AU - Gasdia, S., D. AB - Abstract A test was developed to evaluate the comparative moisture tightness of various prescription containers. The test consists of placing two grams of anhydrous calcium chloride into each container, closing the container and weighing it. The containers are then placed in a constant humidity chamber (86% relative humidity) at room temperature and weighed at one-week intervals over a period of four weeks. The percentage increase in weight is taken as a comparative measure of the container's moisture tightness. Thirteen different prescription containers were tested. Glass vials with lined, phenolic screw-cap closures provided the best protection against penetration by moisture vapor; an amber polystyrene vial with a child-resistant closure was the least effective among the containers tested. Containers, Closures, Glass, Moisture, Packaging, Plastics, Polystyrene, Prescriptions, Tests This content is only available as a PDF. Copyright © 1974, American Society of Hospital Pharmacists, Inc. All rights reserved. TI - Comparative evaluation of the moisture-tightness of various prescription containers JF - American Journal of Health-System Pharmacy DO - 10.1093/ajhp/31.6.600 DA - 1974-06-01 UR - https://www.deepdyve.com/lp/oxford-university-press/comparative-evaluation-of-the-moisture-tightness-of-various-G5iU4smTcM SP - 600 EP - 601 VL - 31 IS - 6 DP - DeepDyve ER -