Melting Point of Common Salts
The melting point of salts varies widely depending on the specific type of salt compound. The following table provides a curated list of melting point values for common salts at 1 atmospheric (atm) pressure. (1 atm = 101,325 Pa)
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| Sodium chloride (NaCl) | 800 |
| Potassium chloride (KCl) | 770 |
| Calcium chloride (CaCl2) | 772 |
| Sodium carbonate (Na2CO3) | 856 |
| Sodium sulfate (Na2SO4) | 884 |
| Potassium sulfate (K2SO4) | 1069 |
| Magnesium sulfate (MgSO4) | 1124 (decomposes) |
| Sodium bicarbonate (NaHCO3) | 50 (decomposes) |
| Ammonium chloride (NH4Cl) | 338 (sublimes) |
| Ammonium sulfate ((NH4)2SO4) | 280 (decomposes) |
| Sodium nitrate (NaNO3) | 308 |
| Potassium nitrate (KNO3) | 337 |
| Aluminum sulfate (Al2(SO4)3) | 770 (decomposes) |
| Sodium phosphate (Na3PO4) | 1583 |
| Potassium phosphate (K3PO4) | 1340 |
| Sodium acetate (C2H3NaO2) | 324 |
| Sodium thiosulfate (Na2S2O3) | 48.5 |
| Ammonium nitrate (NH4NO3) | 170 |
| Sodium citrate (Na3C6H5O7) | > 300 |
| Potassium bromide (KBr) | 730 |
| Sodium bromide (NaBr) | 747 |
| Sodium metabisulfite (Na2S2O5) | > 150 (decomposes) |
| Sodium bisulfate (NaHSO4) | 186 |
| Sodium hexametaphosphate ((NaPO3)6) | 610 |
| Sodium hydrogen carbonate (NaHCO3) | 50 (decomposes) |
| Potassium chlorate (KClO3) | 368 |
| Sodium chlorate (NaClO3) | 248 |
| Sodium perchlorate (NaClO4) | 480 (decomposes) |
| Potassium permanganate (KMnO4) | 240 (decomposes) |
| Sodium chromate (Na2CrO4) | 794 |
| Sodium dichromate (Na2Cr2O7) | 357 |
| Sodium Borate (Na2B4O7) | 743 |
| Sodium nitrite (NaNO2) | 271 |
| Sodium hydrosulfide (NaHS) | 350 |
Related Tables
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) Occupational Safety and Health Administration (OSHA): The National Institute for Occupational Safety and Health (NIOSH).