Sodium Benzoate (Pharmaceutical Grade)
CAS Number: 532-32-1
Pharmaceutical grade Sodium Benzoate is the sodium salt of benzoic acid, used as an antimicrobial preservative in oral liquid, topical, and cosmetic formulations. It is most effective in acidic formulations (pH 2–5) where it exists predominantly as the active undissociated benzoic acid form. It is also used as a solubilizer for caffeine and as a food-grade flavoring agent.
Technical Specifications
| assay (%) | ≥99.0 |
| appearance | White granules or crystalline powder |
| chloride (ppm) | ≤200 |
| pH (5% solution) | 7.5–9.0 |
| heavy metals (ppm) | ≤10 |
| loss on drying (%) | ≤1.5 |
Applications
- Oral liquid antimicrobial preservative
- Topical and cosmetic preservative
- Acidic formulation preservative (pH 2–5)
- Caffeine solubilizer
- Food and pharmaceutical flavoring
Key Features
- Effective in acidic formulations (pH 2–5)
- Water-soluble preservative
- GRAS status for oral use
- USP/NF, EP compliant
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CAS Number
532-32-1
Category
Pharmaceutical ExcipientsAvailability
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