Superacid

{
  "id": "MLC-T-CHM-011586",
  "term": "Superacid",
  "field": "Chemistry",
  "definition": "An acidic medium with a proton-donating ability greater than that of pure sulfuric acid. Its acidity is quantified by the Hammett acidity function (H₀), with superacids having H₀ values more negative than −12, the value for 100% H₂SO₄. A common example is \"magic acid\", a mixture of antimony pentafluoride and fluorosulfuric acid, which is strong enough to protonate alkanes.",
  "subject": "Organic and Biomolecular Chemistry",
  "see_also": [
    "Brønsted acid",
    "Lewis acid",
    "acidity",
    "basicity",
    "catalysis"
  ],
  "references": [
    "PAC, 1994, 66, 1077. 'Glossary of terms used in physical organic chemistry (IUPAC Recommendations 1994)' on page 1169 (https://doi.org/10.1351/pac199466051077)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/superacid/"
}