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1. Product Information
Product Name: Zein /Corn Prolamin
Appearance: Yellow to pale yellow flakes (glossy on one side) or yellow to pale yellow powder
Packing: 15 kg/drum
Solubility: Insoluble in water and anhydrous ethanol
Application:
Pharmaceutical Excipients: Tablet coating, sustained-release materials.
Food Additives: Applied in chocolate, malt balls and other products to enhance gloss and extend shelf life.
Other Industrial Applications: Antioxidants, biodegradable plastics, adhesives, cosmetics, etc.
2 Identification & Test Standards
Testing basis: Chinese Pharmacopoeia 2025 Edition
3. Technical Specifications
Test Item | Specifications |
Character | Yellow or pale-yellow flakes with a certain luster on one side; or yellow or pale-yellow powder. Insoluble in water or ethanol. |
Identification | Shall comply with the specification |
Loss on Drying (%) | ≤8.0 |
Residue on ignition (%) | ≤0.3 |
Hexane-soluble substances (%) | ≤12.5 |
Heavy Metal, ppm | ≤20 |
Total Aerobic Microbial Count (CFU/g) | ≤103 |
E.coli | ND |
Mold and Yeast (CFU/g) | ≤102 |
Total nitrogen (N on dry basis) | 13.1-17.0% |
4. Product Properties
Solubility: Insoluble in water and ethanol; soluble in aqueous alcohol, alkaline aqueous solution, acetone-water mixed solvent.
Film-forming property: Excellent film-forming ability; the formed film is uniform, glossy, water-resistant and oil-resistant.
Barrier performance: Good barrier against oxygen, grease and moisture.
Biocompatibility: Edible, biodegradable, non-toxic, widely used in food and pharmaceutical industries.
5. Storage Condition
Store in a cool, dry, well-ventilated warehouse, sealed away from moisture, direct sunlight and high temperature.
Avoid contact with strong oxidants, strong acids and strong alkalis.
Shelf life: 36 months under recommended storage.
6. Handling & Transportation
Keep package sealed during transportation; prevent rain, dampness and violent collision.
Handle with care to avoid damage to packaging barrels.
No mixed transport with toxic, corrosive hazardous goods.