Propylparaben (Pharmaceutical Grade)
CAS Number: 94-13-3
Pharmaceutical grade Propylparaben (propyl 4-hydroxybenzoate) is an antimicrobial preservative used in combination with methylparaben to provide synergistic broad-spectrum antimicrobial protection in oral, topical, and parenteral formulations. Its higher lipophilicity compared to methylparaben makes it effective against fungi and lipophilic organisms. It is effective at low concentrations (0.01–0.1%).
Technical Specifications
| assay (%) | 99.0–101.0 |
| appearance | White crystalline powder |
| sulfated ash (%) | ≤0.1 |
| heavy metals (ppm) | ≤10 |
| loss on drying (%) | ≤0.5 |
| melting range (°C) | 96–99 |
Applications
- Combination preservative with methylparaben
- Oral liquid and suspension preservative
- Topical formulation antifungal preservative
- Parenteral multi-dose preservative
- Cosmetic preservation
Key Features
- Higher lipophilicity for antifungal activity
- Synergistic with methylparaben
- Effective at very low concentrations
- USP/NF, EP compliant
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CAS Number
94-13-3
Category
Pharmaceutical ExcipientsAvailability
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