Why Propylene Glycol 99% Is Essential in Modern Formulations
Introduction
Propylene Glycol 99% is a high-purity, versatile, and widely-used chemical compound known for its outstanding solvency, moisture retention, and stability properties. With applications spanning pharmaceuticals, cosmetics, food, and industrial processes, it serves as a key functional ingredient in countless formulations.
Key Properties & Advantages
Excellent Solvent
Dissolves active ingredients, flavors, colors, and preservatives
Commonly used to stabilize emulsions and suspensions
Moisture Retention & Humectancy
Helps retain water in cosmetic and pharmaceutical products
Prevents dryness in food, skincare, and topical formulations
Thermal Stability
High boiling point and low vapor pressure make it suitable for heat-processed products
Compatible with a wide range of chemical reactions and processes
Safe for Sensitive Applications
GRAS (Generally Recognized as Safe) by FDA
Used in oral, topical, and inhalation formulations
Non-toxic & Non-irritating
Gentle on skin, making it suitable for cosmetics and baby care products
Can be used as a carrier for active ingredients
Applications Across Industries
| Industry | Function | Examples |
|---|---|---|
| Pharmaceuticals | Solvent, carrier, stabilizer | Oral syrups, injectables, topical gels |
| Cosmetics & Personal Care | Humectant, emulsifier, preservative booster | Creams, lotions, shampoos, deodorants |
| Food & Beverages | Humectant, carrier for flavorings | Icing, soft drinks, baked goods |
| Industrial | Heat transfer fluid, antifreeze | Coolants, deicing fluids, hydraulic fluids |
Typical Specification
| Property | Value |
|---|---|
| Purity | ≥99.0% |
| Appearance | Clear, colorless |
| Specific Gravity (20°C) | 1.035 – 1.040 |
| Moisture Content | ≤0.2% |
| Odor | Odorless |
| pH (5% aqueous solution) | 6.0 – 7.5 |
Safety & Handling
Storage: Keep in a cool, dry place in tightly closed containers
Shelf Life: Typically 24 months in original packaging
Handling: Non-corrosive, but basic PPE is recommended during industrial use
Frequently Asked Questions
Q: Is Propylene Glycol 99% safe for skincare products?
A: Yes, it is commonly used in cosmetics as a humectant and solvent, approved for use by regulatory agencies worldwide.
Q: Can it be used in food applications?
A: Absolutely. Food-grade propylene glycol 99% is used as a carrier for flavors, colors, and emulsifiers in baked goods, beverages, and processed foods.
Q: How does it differ from glycerin?
A: While both are humectants, propylene glycol is less viscous and more volatile, making it ideal for products requiring faster absorption or lighter feel.
Conclusion
Propylene Glycol 99% is an indispensable component in countless formulations thanks to its versatility, purity, and safety profile. Whether you're formulating pharmaceuticals, personal care products, food, or industrial solutions, PG 99% delivers consistent performance and unmatched functionality. For product developers seeking reliability and flexibility, this compound is a must-have ingredient.
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