Propyl Terphenyl

Updated: 2026-07-21

Overview

Propylterphenyl is a synthetic aromatic hydrocarbon derived from benzene and propyl groups. It is primarily used in industrial applications due to its thermal stability and dielectric properties. The compound is a colorless to pale yellow liquid with a mild aromatic odor. It is insoluble in water but miscible with most organic solvents. Propylterphenyl is commonly utilized in high-temperature environments, such as heat transfer systems and electrical insulation. Its molecular structure allows it to withstand temperatures up to 300°C without significant degradation, making it a preferred choice for specialized industrial applications.

Physical and Chemical Properties

Propylterphenyl exhibits a density of 0.96-0.98 g/cm³ at 20°C and a boiling point range of 290-310°C. Its low volatility and high thermal stability make it suitable for prolonged use in high-temperature systems. The compound is chemically inert under normal conditions but may react with strong oxidizing agents. The molecular weight of propylterphenyl is 196.29 g/mol, and its CAS number is 26140-60-3. It is insoluble in water but readily dissolves in organic solvents such as toluene, acetone, and ethanol. These properties make it an ideal candidate for applications requiring stable, non-polar media.

Main Applications

Propylterphenyl is widely used as a heat transfer fluid in industrial processes requiring precise temperature control. Its high thermal stability and low volatility make it ideal for closed-loop systems in chemical manufacturing and power generation. Another significant application is as a dielectric fluid in transformers and capacitors. Its excellent electrical insulating properties and resistance to thermal degradation ensure reliable performance in high-voltage environments. Additionally, propylterphenyl serves as an additive in lubricants to enhance thermal stability and reduce oxidation.

Safety and Storage

Propylterphenyl should be handled with care to avoid inhalation or skin contact. Personal protective equipment (PPE), including gloves and goggles, is recommended when working with the compound. In case of exposure, rinse affected areas with water and seek medical advice if necessary. Storage conditions should include a cool, dry, and well-ventilated area away from open flames or heat sources. The compound is stable under normal conditions but may decompose at high temperatures, releasing hazardous fumes. Proper labeling and containment are essential to prevent accidental spills or leaks.

B2B Procurement Guide

When procuring propylterphenyl, verify the CAS number (26140-60-3) and purity specifications to ensure product quality. Bulk orders typically offer cost savings, so consider volume requirements when negotiating with suppliers. Reliable suppliers should provide material safety data sheets (MSDS) and certificates of analysis (CoA). Prices range approximately $50-$100 per kg, depending on purity and quantity. Establish long-term contracts with reputable manufacturers to secure consistent supply and favorable terms.