- Fluorosulfuric acid
- Fluosulfonic acid
- Monofluorosulfuric acid
A fuming liquid.
Fluorinating agent, catalyst in alkylation, acylation, polymerization & condensation reactions, in hydrofluorination of olefins, in prodn of substituted pyridines, in prodn of petroleum products, prepn of magic acid.
Registry Numbers and Inventories.
EC Index Number
Japan ENCS (MITI)
Melting point, °C
Boiling point, °C
Vapor pressure, mmHg
0.94 (25 C)
Vapor density (air=1)
1.73 g/cm3 (20 C)
Solubility in water
Partition coefficient, pKow
Heat of vaporization
Hazards and Protection.
Keep in a cool, dry, dark location in a tightly sealed container or cylinder. Keep away from incompatible materials, ignition sources and untrained individuals. Secure and label area. Protect containers/cylinders from physical damage.
All chemicals should be considered hazardous. Avoid direct physical contact. Use appropriate, approved safety equipment. Untrained individuals should not handle this chemical or its container. Handling should occur in a chemical fume hood.
Wear appropriate protective gloves, clothing and goggles.
Wear positive pressure self-contained breathing apparatus (SCBA).
Keep material out of water sources and sewers. Build dikes to contain flow as necessary. Use water spray to knock-down vapors. Do not use water on material itself. Neutralize spilled material with crushed limestone, soda ash, or lime.
Fumes in moist air; stable to 900 C.
Reacts exothermically with chemical bases (examples: amines, amides, and inorganic hydroxides) Reacts violently with water to generate hydrofluoric acid and sulfuric acid Reacts with active metals, including such structural metals as aluminum and iron, to release hydrogen, a flammable gas Reacts with cyanide compounds to release gaseous hydrogen cyanide.
See fluosulfonates.When heated to decomposition, they emit highly toxic fumes of fluorides and oxides of sulfur.
Extinguish fire using agent suitable for type of surrounding fire. (Material itself does not burn or burns with difficulty.) Use water in flooding quantities as fog. Cool all affected containers with flooding quantities of water. Apply water from as far a distance as possible.
May burn but not ignite readily. May ignite combustibles (wood, paper, oil, clothing, etc.).
Substance will react with water (some violently), releasing corrosiveand/or toxic gases.
Toxic and irritating fumes of hydrogen fluoride and sulfuric acid may form in fires.
Hyperactive reflexes, painful muscle spasms, weakness and tetanic contractures may be noted due to fluoride induced hypocalcemia. Prenatal fluoride supplementation (2.2 mg NaF or 1 mg fluoride daily) during the last two trimesters of pregnancy has been reported to be safe.
Epigastric pain, nausea, dysphagia, salivation, hematemesis, and diarrhea may be noted. These effects may be delayed for several hours following exposure. Gi symptoms are noted when 3 to 5 mg/kg of fluoride are ingested.
Respirations are first stimulated then depressed. Death is usually from respiratory paralysis. Following inhalation, coughing and choking may be noted.
Urticaria and pruritus have been reported following exposure to fluoride.
Seek medical assistance.
Remove victim to fresh air; if he is unconscious, give artificial respiration.
Flush with water until medical help arrives; soak burned area in strong Epsom salt solution; pay particular attention to area around fingernails.
Flush with water until medical help arrives.
USCG CHRIS Code
Std. Transport #