Propylene Glycol (Pharmaceutical Grade)
CAS Number: 57-55-6
Pharmaceutical grade Propylene Glycol (1,2-propanediol) is a versatile, generally recognized as safe (GRAS) solvent and humectant used in oral, parenteral, topical, and inhalation formulations. It effectively dissolves a wide range of poorly water-soluble APIs, acts as a plasticizer for film coatings, and serves as a preservative co-solvent in liquid formulations.
Technical Specifications
| assay (%) | ≥99.5 |
| appearance | Clear, colorless, viscous liquid |
| water content (%) | ≤0.2 |
| heavy metals (ppm) | ≤5 |
| specific gravity (25°C) | 1.035–1.040 |
| viscosity at 25°C (mPa·s) | ~40–60 |
Applications
- Solvent for poorly water-soluble APIs
- Film coating plasticizer
- Topical formulation humectant
- Parenteral co-solvent
- Oral liquid vehicle
Key Features
- GRAS status for multiple routes of administration
- Excellent solvency for hydrophobic APIs
- Effective plasticizer and humectant
- USP/NF, EP compliant
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CAS Number
57-55-6
Category
Pharmaceutical ExcipientsAvailability
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