In the pharmaceutical and health supplement processing industries, empty capsules are the most commonly used pharmaceutical excipients, and their quality directly determines the quality of the final drug product. However, after receiving goods, many purchasers or warehouse managers often overlook the importance of the storage environment, arbitrarily stacking empty capsules near windows. Little do they know that storing empty capsules by unshaded windows can easily lead to capsule adhesion and deformation. This small oversight could cause huge economic losses for the enterprise.
Why Are Unshaded Windows a Nightmare for Empty Capsules?
The primary component of empty capsules is usually pharmaceutical gelatin. As a natural protein polymer material, gelatin has unique physical properties: it is light-sensitive, heat-sensitive, and moisture-sensitive. Window sills may seem ventilated, but in reality, they are one of the most unstable areas in a warehouse.
Light Accelerates Aging: Even without direct sunlight exposure, unshaded windows cannot block the long-term penetration of strong light and UV rays. Ultraviolet light destroys the molecular chains of gelatin, causing the capsule shells to become brittle, yellow, and significantly reducing their physical strength.
Temperature and Humidity Fluctuations Trigger Deformation: The temperature difference between day and night is significant near windows, and moisture tends to accumulate there. When empty capsules are kept in this environment of alternating cold and heat with unstable humidity for a long time, the capsule shells repeatedly absorb and release moisture. Once this Breathing Effect exceeds a critical point, it directly leads to capsule adhesion and deformation, and may even cause severe caking.
The Chain Reaction Caused by Capsule Adhesion and Deformation
When you open the packaging and find that originally round and smooth empty capsules have become twisted, soft, or even stuck together in clumps that cannot be separated, the problem is serious:
Production Obstruction: Deformed empty capsules cannot smoothly pass through the molds of automatic capsule filling machines, leading to machine jamming and stoppages, which severely impacts production efficiency.
Inaccurate Filling: Deformation of the capsule body or cap leads to poor locking. During the filling process, this can cause powder leakage or loose capsule closure, resulting in substandard filling weight variations that do not comply with pharmacopoeia standards.
Product Scrapping: Finished products produced using inferior excipients will be affected in terms of disintegration time and dissolution rates, ultimately leading to the rework or scrapping of the entire batch.
Expert Advice: The Scientific Way to Store Empty Capsules
To ensure the physical stability of empty capsules and guarantee smooth production, please strictly observe the following storage specifications:
Strict Light Avoidance: Empty capsules must be stored in a cool, dry place. Placement near unshaded windows is strictly prohibited. It is recommended to use dedicated light-proof storage cabinets or keep warehouse curtains closed at all times.
Control Temperature and Humidity: Standard storage temperatures should be maintained between 15-25°C, and relative humidity between 35%-65%. This is the key to preventing capsules from absorbing moisture and sticking together.
Original Packaging Sealing: Unused empty capsules should not be left open. Try to maintain the seal of the original packaging or use moisture-proof bags for secondary sealing to avoid direct contact with air.
Follow First-In, First-Out: Plan inventory rationally to avoid long-term storage of empty capsules in the warehouse, reducing quality risks caused by time accumulation.
High-quality empty capsules are the cornerstone of excellent medicines. Do not let incorrect storage methods ruin expensive raw materials. Please check your warehouse immediately, keep away from unshaded windows, and create a dry, light-proof home for empty capsules so that every capsule can maximize its medicinal value.
