Properties of Limonene (C10H16)

Limonene is a naturally occurring chemical compound found in the peels of citrus fruits, particularly in high concentrations in lemons and oranges. It is a type of terpene, a class of organic compounds commonly found in plants. Limonene is known for its strong, pleasant citrus aroma and is often used in various products such as fragrances, cleaning agents, and as a flavoring agent in food and beverages.

The following table provides a comprehensive list of limonene properties in both SI and US customary/Imperial units at normal temperature and pressure (NTP).

Click on the icon to switch between Metric and Imperial units.

Table of Limonene Properties
Physical Properties
Metric
Molar Mass136.23 g/mol
Density841 kg/m3
Dynamic Viscosity0.923 mPa·s
Surface Tension26.87 mN/m
Thermal PropertiesMetric
Melting Point-74.3 °C
Boiling Point176 °C
Thermal Conductivity0.1197 W/m·K
Vapor Pressure (25°C)0.277 kPa
Critical ConstantsMetric
Critical Temperature (Tc)380 °C
Critical Pressure (Pc)2.81 MPa
Critical Molar Volume (Vc)498 cm3/mol
Electrical PropertiesMetric
Relative Permittivity (εr) (25°C)2.375
Optical PropertiesMetric
Refractive Index (589 nm) (25°C)1.4744
Hazardous DataMetric
Flash Point45 °C
Autoignition Temperature237 °C
Lower Flammability Limit0.7%
Upper Flammability Limit6.1%
NFPA Rating (Health)2
NFPA Rating (Fire)2
NFPA Rating (Reactivity)0

Unless stated otherwise, all values are taken at room temperature (approximately 20°C or 68°F) and 1 atm pressure. (1 atm = 101,325 Pa)

Related Pages
References: 1) Cardarelli, François. Materials Handbook: A Concise Desktop Reference. Switzerland: Springer International Publishing, 2018. 2) CRC Handbook of Chemistry and Physics, 97th Edition. United Kingdom: CRC Press, 2016-2017. 3) Yaws, Carl L. The Yaws Handbook of Physical Properties for Hydrocarbons and Chemicals. Netherlands: Elsevier Science, 2015. 4) Fire Protection Guide to Hazardous Materials, 14th Edition. United States: National Fire Protection Association, 2010.