Propylene Glycol Technical Grade

Product Overview

Propylene Glycol Technical Grade is a high-purity (typically 99.6%), colorless, and odorless liquid widely used in industrial applications. Also known as Propane-1,2-diol, MPG, or simply PG, this hygroscopic diol serves as a critical component in heat transfer fluids, industrial coolants, and chemical manufacturing. Its high boiling point (188.2°C) and low volatility make it an effective carrier solvent and intermediate for resin and polymer production.

This technical grade material provides dependable purity for process streams where moisture control and viscosity management are essential. With a density of approximately 1.037 g/mL, it offers consistent mass balance in formulation. Propylene Glycol Technical Grade is compatible with water and various organic solvents, making it a versatile solution for freeze point depression in HVAC systems and as a raw material in the synthesis of polyesters and urethanes.

Key Properties

• Appearance: Clear, colorless liquid
• Chemical Formula: C₃H₈O₂
• CAS Number: 57-55-6
• Molecular Weight: 76.09 g/mol
• Assay: 99.0–100.5% (Typical 99.6%)
• Boiling Point: 188.2°C
• Freezing Point: -59°C
• Specific Gravity (20°C): 1.036–1.038
• Viscosity (25°C): 59 cP
• Water Content: ≤ 0.5%
• Acidity: ≤ 0.1 meq/kg

Common Industrial Applications

• Heat Transfer Fluids: Used extensively in industrial chillers, HVAC systems, and closed-loop cooling systems to lower the freezing point of water and provide burst protection for pipes.
• Industrial Antifreeze & De-icing: A primary ingredient in non-toxic antifreeze formulations for engines, sprinkler systems, and aircraft de-icing fluids due to its freeze-depressing capabilities.
• Chemical Intermediate: Serves as a raw material in the production of high-performance unsaturated polyester resins (UPR), polyurethanes, and paints/coatings.
• Industrial Solvent: Acts as a solvent for gums, resins, and dyes in the printing and textile industries, as well as a stabilizer in hydraulic fluids.
• Surface Coatings: Used in the formulation of paints, varnishes, and lacquers to control viscosity and drying times.

Safety & Handling

Handle Propylene Glycol Technical Grade in accordance with standard industrial hygiene practices. While it exhibits low toxicity, proper PPE including gloves and safety goggles should be worn to prevent skin and eye irritation. Store in a cool, dry, well-ventilated area away from direct sunlight. Ensure containers—typically HDPE or steel—are tightly sealed to prevent moisture absorption (hygroscopic).

Storage: Keep containers closed when not in use. Store away from strong oxidizing agents.
Transport: See SDS for specific transport classifications regarding bulk shipments (UN 3082).

Related Products

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