Methylparaben (Pharmaceutical Grade)
CAS Number: 99-76-3
Pharmaceutical grade Methylparaben (methyl 4-hydroxybenzoate) is a widely used antimicrobial preservative in oral, topical, and parenteral formulations. It exhibits broad-spectrum antimicrobial activity and is typically used in combination with propylparaben for synergistic effect. It is effective over a wide pH range (4–8) and is soluble in water and most organic solvents.
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) | 125–128 |
Applications
- Oral liquid and suspension preservative
- Topical cream and lotion preservative
- Parenteral formulation preservative
- Combined with propylparaben for broad spectrum
- Cosmetic and personal care preservative
Key Features
- Broad-spectrum antimicrobial at low levels
- Effective across wide pH range (4–8)
- Synergistic with propylparaben
- USP/NF, EP compliant
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CAS Number
99-76-3
Category
Pharmaceutical ExcipientsAvailability
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