Melting Point of Common Acids
The melting point of acids can vary widely depending on the specific acid and its molecular structure. Acids are generally covalent compounds, and their melting points can be influenced by factors such as molecular size, intermolecular forces, and the presence of functional groups.
The following table provides a comprehensive list of melting point values for common acids at 1 atmospheric (atm) pressure. (1 atm = 101,325 Pa)
Click on the icon to switch between degrees Celsius (°C) and degrees Fahrenheit (°F) units.
| Acetic Acid (CH3COOH) | Organic | 16.65 |
| Acetyl Chloride (CH3COCl) | Organic | -112.7 |
| Acetylsalicylic Acid (C9H8O4) | Organic | 135 |
| Aluminum Chloride (AlCl3) | Inorganic | 192.6 |
| Antimony Pentafluoride (SbF5) | Inorganic | 8.3 |
| Benzoic Acid (C7H6O2) | Organic | 122.3 |
| Boric Acid (H3BO3) | Inorganic | 170.9 |
| Boron Trifluoride (BF3) | Inorganic | -126.8 |
| Butyric Acid (C4H8O2) | Organic | -5.1 |
| Caproic Acid (C6H12O2) | Organic | -3 |
| Chromic Acid (H2CrO4) | Inorganic | 196 |
| Citric Acid (C6H8O7) | Organic | 153 |
| Formic Acid (HCOOH) | Organic | 8.3 |
| Glycolic Acid (C2H4O3) | Organic | 79.5 |
| Hydrobromic Acid (HBr) | Inorganic | -86.8 |
| Hydrochloric Acid (HCl) | Inorganic | -114.2 |
| Hydrofluoric Acid (HF) | Inorganic | -83.4 |
| Hydrogen Cyanide (HCN) | Inorganic | -13.2 |
| Hydrogen Peroxide (H2O2) | Inorganic | -0.43 |
| Hydrogen Selenide (H2Se) | Inorganic | -65.7 |
| Hydrogen Sulfide (H2S) | Inorganic | -85.5 |
| Hydrogen Telluride (H2Te) | Inorganic | -49 |
| Hypofluorous Acid (HFO) | Inorganic | -117 |
| Iron(iii) Chloride (FeCl3) | Inorganic | 307.6 |
| Lactic Acid (C3H6O3) | Organic | 17 |
| Linoleic Acid (C18H32O2) | Organic | -6.9 |
| Malonic Acid (C3H4O4) | Organic | Decomposes at 135 |
| Nitric Acid (HNO3) | Inorganic | -41.6 |
| Oleic Acid (C18H34O2) | Organic | 14 |
| Oxalic Acid (C2H2O4) | Organic | Decomposes at 189.5 |
| Palmitic Acid (C16H32O2) | Organic | 62.5 |
| Perchloric Acid (HClO4) | Inorganic | -112 |
| Phosphoric Acid (H3PO4) | Inorganic | 42.4 |
| Propionic Acid (C3H6O2) | Organic | -21 |
| Stearic Acid (C18H36O2) | Organic | 69.3 |
| Succinic Acid (C4H6O4) | Organic | 185 |
| Sulfuric Acid (H2SO4) | Inorganic | 10.3 |
| Trichloroacetic Acid (C2HCl3O2) | Organic | 58 |
| Triflic Acid (CF3SO3H) | Organic | -40 |
| Valeric Acid (C5H10O2) | Organic | -34 |
Related Tables
References: 1) CRC Handbook of Chemistry and Physics, 97th Edition. United Kingdom: CRC Press, 2016-2017. 2) Cardarelli, François. Materials Handbook: A Concise Desktop Reference. Switzerland: Springer International Publishing, 2018. 3) Occupational Safety and Health Administration (OSHA): The National Institute for Occupational Safety and Health (NIOSH). 4) Yaws, Carl L. The Yaws Handbook of Physical Properties for Hydrocarbons and Chemicals. Netherlands: Elsevier Science, 2015. 5) Fire Protection Guide to Hazardous Materials, 14th Edition. United States: National Fire Protection Association, 2010.