Properties of Acetyl Chloride (C2H3ClO)

Acetyl chloride, also known as ethanoyl chloride, is a chemical compound with the formula C2H3ClO. It is an acyl chloride and is derived from acetic acid (the main component of vinegar) by replacing the hydroxyl group (-OH) with a chlorine atom. Acetyl chloride is a colorless, highly reactive liquid that is used in various chemical reactions, particularly in the synthesis of organic compounds.

The following table provides a comprehensive list of acetyl chloride 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 Acetyl Chloride Properties
Physical Properties
Metric
Molar Mass78.5 g/mol
Density1105 kg/m3
Dynamic Viscosity0.368 mPa·s
Surface Tension26.7 mN/m
Thermal PropertiesMetric
Melting Point-112.7 °C
Boiling Point51 °C
Thermal Conductivity0.133 W/m·K
Specific Heat Capacity (Cp)864 J/kg·K
Vapor Pressure31.37 kPa
Critical ConstantsMetric
Critical Temperature (Tc)246 °C
Critical Pressure (Pc)5.83 MPa
Critical Molar Volume (Vc)0.2 cm3/mol
Electrical PropertiesMetric
Relative Permittivity (εr)15.8
Optical PropertiesMetric
Refractive Index (589 nm)1.39
Hazardous DataMetric
Flash Point4 °C
Autoignition Temperature390 °C
NFPA Rating (Health)3
NFPA Rating (Fire)3
NFPA Rating (Reactivity)2

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.