Properties of Hydrogen Peroxide (H2O2)
Hydrogen peroxide is a chemical compound with the chemical formula H2O2. It is a pale blue liquid that appears colorless in a dilute solution. Hydrogen peroxide is a powerful oxidizer and disinfectant that is commonly used as a cleaning agent, antiseptic, and bleaching agent.
The following table provides a comprehensive list of hydrogen peroxide 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.
| Physical Properties | Metric |
|---|---|
| Molar Mass | 34.015 g/mol |
| Density | 1440 kg/m3 |
| Dynamic Viscosity | 1.249 mPa·s |
| Surface Tension | 80.4 mN/m |
| Thermal Properties | Metric |
| Melting Point | -0.43 °C |
| Boiling Point | 150.2 °C |
| Vapor Pressure (25°C) | 0.26 kPa |
| Critical Constants | Metric |
| Critical Temperature (Tc) | 457 °C |
| Critical Pressure (Pc) | 20.99 MPa |
| Electrical Properties | Metric |
| Relative Permittivity (εr) | 74.6 |
| Optical Properties | Metric |
| Refractive Index (589 nm) (28°C) | 1.4061 |
| Hazardous Data | Metric |
| NFPA Rating (Health) | 3 |
| NFPA Rating (Fire) | 0 |
| NFPA Rating (Reactivity) | 3 |
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.