Propylene Glycol USP Grade

Product Overview

Propylene Glycol USP Grade is a high-purity, colorless, odorless, and hygroscopic liquid extensively used as a solvent and humectant in industrial, pharmaceutical, and food processing applications. Also known as Propane-1,2-diol, MPG, or simply PG, this chemical possesses a formula of C₃H₈O₂. It acts as a diol, providing necessary miscibility with water and organic solvents. This product strictly adheres to USP-NF Monograph standards, ensuring full traceability to pharmacopeial specifications and consistent quality across all production lots.

With a typical assay of 99.9 wt%, Alliance Chemical guarantees stringent control of impurities, including chlorides, nitrates, and heavy metals. This USP Grade Propylene Glycol is engineered for stability, exhibiting a controlled vapor pressure profile and low residue on ignition. It is fully compatible with HDPE and glass storage. Its low toxicity profile and low vapor emissions make it the preferred choice for sensitive environments, serving as a critical component in HPLC mobile phases, non-toxic antifreeze systems, and cosmetic formulations.

Key Properties

• Assay (wt%): 99.5–100.5 (Typical: 99.9)
• Chemical Formula: C₃H₈O₂
• CAS Number: 57-55-6
• Molecular Weight: 76.09 g/mol
• Boiling Point: 188.2°C
• Specific Gravity (20°C): 1.033–1.039
• Water Content: <0.5% (Typical: 0.1%)
• Flash Point: 97°C
• Appearance: Clear, colorless liquid
• Grade: USP (United States Pharmacopeia)

Common Applications

• Industrial Heat Transfer: Utilized as a non-toxic antifreeze and de-icing agent for industrial cooling systems requiring low toxicity profiles.
• Pharmaceutical Solvent: Serves as a primary solvent and carrier in drug formulations, meeting strict USP compliance for purity.
• Food Processing Humectant: Acts as a moisture-retaining agent to preserve texture and prevent crystallization in food products.
• HPLC Mobile Phase: Used in reversed-phase chromatography for the separation of organic compounds in analytical laboratories.
• Cosmetic Formulations: Functions as a moisturizer, emulsifier, and carrier solvent in skincare and personal care products.

Safety Precautions

Handle Propylene Glycol USP Grade in a well-ventilated area. While this product has a low toxicity profile, standard industrial hygiene practices should be observed. Wear appropriate Personal Protective Equipment (PPE), including chemical-resistant gloves and safety goggles, to prevent prolonged skin or eye contact. Store in cool, dry conditions in compatible containers such as HDPE or glass.

This product is not regulated as a hazardous material for transport (Non-Hazmat). However, always reference the Safety Data Sheet (SDS) for detailed spill response, first aid, and emergency procedures. In the event of exposure: rinse eyes cautiously with water; wash skin with soap and water; move to fresh air if inhaled. Verify compliance with all local, state, and federal regulations regarding storage and disposal.

Benefits

• High Purity USP Grade: Meets USP-NF monograph requirements with >99.5% assay for critical applications.
• Versatile Solvent: Miscible with water, acetone, and chloroform, supporting diverse industrial formulations.
• Low Toxicity Profile: Suitable for applications where low toxicity and low volatility are required.
• Reliable Supply Chain: Available in bulk sizes from 1 gallon to 330-gallon totes for scalable manufacturing.

Related Products

• 100% Ethylene Glycol Inhibited
• 100% Propylene Glycol Inhibited
• 30% Propylene Glycol Inhibited
• 30% Propylene Glycol Technical Grade