Product Description for Propylene Glycol (CAS 57-55-6)
Basic Information
Chemical Name: 1,2-Propanediol
Synonyms: Propylene Glycol, 1,2-Propylene Glycol, Monopropylene Glycol, PG
Molecular Formula: C₃H₈O₂
Molecular Weight: 76.09
CAS Number: 57-55-6
EINECS Number: 200-338-0
Physical and Chemical Properties
Appearance: Colorless, odorless, viscous liquid.
Melting Point: -60°C.
Boiling Point: 187°C (lit.).
Density: 1.036 g/mL at 25°C.
Solubility: Miscible with water, acetone, ethyl acetate, and chloroform; soluble in many essential oils but not in petroleum ether or paraffin oil.
Vapor Pressure: 0.08 mm Hg at 20°C.
Refractive Index: _n_20/D 1.432 (lit.).
pH: 6-8 (100 g/L in water, 20°C).
Hygroscopicity: Absorbs moisture from the air.
Applications
Propylene glycol is a versatile chemical with a wide range of applications across multiple industries:
Pharmaceuticals:
Used as a solvent, humectant, and preservative in various formulations, including oral liquids, injectables, and topical preparations.
Acts as a vehicle for corticosteroids, antibiotics, and other medications.
Cosmetics:
Commonly used as a moisturizer and solvent in cosmetic formulations due to its ability to penetrate the skin and provide a non-greasy feel.
Food Industry:
Approved for use as a food additive (GRAS) to maintain moisture and enhance the stability of products.
Used in the production of resins, as an antifreeze in breweries, and as a solvent in food processing.
Industrial Applications:
Serves as an antifreeze, solvent, and plasticizer in the manufacture of plastics and resins.
Used as a coolant in refrigeration systems and as a component in brake fluids.
Other Uses:
Employed in the formulation of deicing fluids and as a stabilizer in various chemical processes.
Advantages
Low Toxicity: Generally recognized as safe (GRAS) for use in food and pharmaceuticals.
High Solubility: Easily dissolves a wide range of substances, making it a versatile solvent.
Stability: Stable at room temperature and under normal storage conditions.
Humectant Properties: Absorbs moisture, making it ideal for maintaining hydration in products.
Safety Information
Storage: Store in a cool, dry place, preferably in airtight containers to prevent moisture absorption.
Handling: Avoid prolonged contact with skin or eyes. Use appropriate personal protective equipment (PPE) when handling.
Hazard Classification: Generally non-toxic, but may cause irritation at high concentrations.
First Aid: If ingested, drink large amounts of water and induce vomiting. If in contact with skin or eyes, rinse thoroughly with water and seek medical attention.
Packaging and Availability
Packaging Options: Available in various sizes,
Bulk Availability: Suitable for large-scale industrial applications
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