Pharmaceutical grade ethyl cellulose
Paint chemicals 2025-03-24
Ethyl cellulose, as an important pharmaceutical excipient widely used in the preparation of pharmaceutical preparations, has excellent thickening, adhesion, film-forming, thermoplasticity, compatibility, physical stability, chemical stability, non-toxicity and harmlessness. It is widely used in oral and topical preparations, and can be used as skeleton materials for slow-release preparations, coating materials, microencapsulation materials, adhesives, drug carriers and backing materials.
Product Overview
Pharmaceutical grade ethyl cellulose (EC) is a non-toxic, inert, and water-insoluble polymer derived from cellulose. It is widely used in drug formulations as a binder, coating agent, and controlled-release matrix due to its excellent film-forming properties, chemical stability, and compatibility with active pharmaceutical ingredients (APIs).
Basic Physicochemical Properties
| Property | Specification | Test Method |
|---|---|---|
| Appearance | White to off-white powder | Visual inspection |
| Ethoxyl Content | 44.0–51.0% | USP/Ph. Eur. |
| Viscosity (5% in toluene:ethanol) | 4–100 mPa·s | Ubbelohde viscometer |
| Moisture Content | ≤3.0% | Karl Fischer titration |
| Solubility | Soluble in organic solvents (ethanol, acetone) | USP <911> |
Key Pharmaceutical Applications
| Application | Function | Typical Use Level |
|---|---|---|
| Tablet Coating | Moisture barrier, taste masking | 2–10% w/w |
| Matrix Tablets | Controlled-release agent | 10–30% w/w |
| Granulation Binder | Improves tablet hardness | 2–5% w/w |
| Microencapsulation | Protects APIs from degradation | 5–20% w/w |
| Topical Gels/Ointments | Thickening & stabilization | 1–5% w/w |
Pharmacopoeial Compliance
| Standard | Requirement | Compliance Status |
|---|---|---|
| USP-NF | Meets ethyl cellulose monograph | Compliant |
| Ph. Eur. | Complies with EP 9.0 standards | Compliant |
| JP (Japanese Pharmacopoeia) | Conforms to JP 18 specifications | Compliant |
| ICH Q3D | Heavy metals <10 ppm | Compliant |
| Residual Solvents | Meets ICH Q3C Class 2/3 limits | Compliant |
Performance Advantages
| Feature | Benefit in Pharmaceutical Use |
|---|---|
| pH-independent release | Stable in GI tract conditions |
| High chemical stability | Resists hydrolysis & oxidation |
| Excellent film-forming | Uniform, flexible coatings |
| Non-ionic nature | Minimal drug interactions |
| Low hygroscopicity | Reduces moisture sensitivity |
Storage & Safety Guidelines
| Parameter | Recommendation |
|---|---|
| Storage conditions | 15–30°C, ≤65% RH |
| Shelf life | 36 months in sealed containers |
| Handling precautions | Use dust mask & gloves |
| Packaging | 5/25 kg HDPE-lined kraft bags |
| Regulatory status | GRAS, FDA 21 CFR 172.868 |
Conclusion
Pharmaceutical grade ethyl cellulose is a versatile excipient for controlled-release formulations, tablet coatings, and drug encapsulation. Its regulatory compliance, stability, and functional versatility make it indispensable in modern pharmaceutical manufacturing.
