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Shellac coating is a natural resin derived from the secretions of the lac bug, primarily found in India and Thailand. It is used as a film coating agent in the pharmaceutical industry due to its excellent film-forming properties, providing a protective layer over tablets and capsules. Shellac is soluble in alcohol and has a glossy finish, making it ideal for enhancing the appearance and stability of pharmaceutical products.
| Appearance | Amber to brown flakes or powder |
| Solubility | Soluble in alcohol and organic solvents |
| pH range | 4.5 to 7.0 |
| Moisture content | Typically less than 5% |
| Film thickness | Varies based on application, typically 10-50 microns |
When choosing shellac coating, consider the specific application and the desired film properties. Specify the required appearance, solubility, and any necessary certifications for pharmaceutical use. It's also important to indicate the quantity needed, as bulk orders may influence pricing and availability.
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Shellac coating is primarily used as a film coating for tablets and capsules in the pharmaceutical industry.
No, shellac is derived from insects and is not considered vegetarian.
Shellac coating can control the release rate of the active ingredient, providing delayed or sustained release.
Yes, shellac is used in food products as a glazing agent.
Store in a cool, dry place away from direct sunlight to maintain its properties.
Yes, shellac is a natural resin and is biodegradable.