Fluorosulfuric acid

Other Classes -> Organic Acids

Corrosives

1.73 at 77 °F (USCG, 1999) - Denser than water; will sink

1.726 AT 25 °C/4 °C

Relative density (water = 1): 1.7

1.726 @25 °C

SOL IN NITROBENZENE

Solubility in water: reaction

324.9 °F at 760 mmHg (USCG, 1999)

163 °C @ 760 MM HG

FORMS STABLE SALTS WHICH ARE LITTLE HYDROLYZED BY WATER & WHICH MAY BE RECRYSTALLIZED FROM WATER; BP: 110 °C AT 120 MM HG; 77.0 °C @ 18 MM HG

163 °C

163 °C @760 [mm Hg]

-125.1 °F (USCG, 1999)

-89 °C

-89 °C

-89 °C

2.5 [mmHg]

Vapor pressure, kPa at 25 °C: 0.33

Fluorosulfonic acid appears as a fuming liquid. Boiling point 163 °C. Density 1.73 g / cm3. Corrosive to metals and to tissue. Both very short contact and the fumes can cause severe painful burns. Used as a catalyst in organic synthesis, in electroplating and as a fluorinating agent.

Colorless liquid that fumes in moist air; [Merck Index] Colorless to light yellow liquid with a choking odor; [CHRIS]

COLOURLESS LIQUID WITH CHARACTERISTIC ODOUR.

Danger

H314: Causes severe skin burns and eye damage [Danger Skin corrosion/irritation]

P260, P261, P264, P271, P280, P301+P330+P331, P302+P361+P354, P304+P340, P305+P354+P338, P316, P317, P321, P363, P405, and P501 (click each P-code to see the statement)

Danger

H314 (100%): Causes severe skin burns and eye damage [Danger Skin corrosion/irritation]

P260, P261, P264, P264+P265, P271, P280, P301+P330+P331, P302+P361+P354, P304+P340, P305+P354+P338, P316, P317, P321, P363, P405, and P501 (click each P-code to see the statement)

Chemical: Fluorosulfuric acid

Fluorosulfuric acid is listed on the EPA's Chemical Data Reporting (CDR) system. Manufacturers and importers of Fluorosulfuric acid are required to report information about their production and use of this chemical to the EPA under the Toxic Substances Control Act (TSCA). (40 eCFR Part 711)

Status: Active Update: 01-12-2021 https://echa.europa.eu/registration-dossier/-/registered-dossier/1784

The New Jersey Worker and Community Right to Know Act requires public and private employers to provide information about hazardous substances at their workplaces. (N.J.S.A. 34:5A-1 et. seq.)

Special Hazards of Combustion Products: Toxic and irritating fumes of hydrogen fluoride and sulfuric acid may form in fires.

· EXCEPT FOR ACETIC ANHYDRIDE (UN1715), THAT IS FLAMMABLE, some of these materials may burn, but none ignite readily.

Not combustible but enhances combustion of other substances. Gives off irritating or toxic fumes (or gases) in a fire.

Inhalation of fumes causes severe irritation of nose and throat. Contact of liquid with eyes or skin causes very severe burns of mouth and stomach. (USCG, 1999)

· CORROSIVE and/or TOXIC; inhalation, ingestion or contact (skin, eyes) with vapors, dusts or substance may cause severe injury, burns or death.

Highly corrosive to skin; [Quick CPC] Reacts with water producing hydrofluoric acid and sulfuric acid; [HSDB] Corrosive to skin, eyes, and respiratory tract; Inhalation may cause pulmonary edema; [ICSC] See the Process, Toxic Gas from Spilling Chemical in Water.

FLUOROSULFONIC ACID is very strongly acidic [Merck]. Reacts exothermically with chemical bases (examples: amines, amides, and inorganic hydroxides). These reactions can generate dangerously large amounts of heat in small spaces. 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. Can initiate the polymerization of certain alkenes. Reacts with cyanide compounds to release gaseous hydrogen cyanide. Generates flammable and/or toxic gases in contact with dithiocarbamates, isocyanates, mercaptans, nitrides, nitriles, sulfides, and strong reducing agents. Additional gas-generating reactions occur with sulfites, nitrites, thiosulfates (to give H2S and SO3), dithionites (SO2), and carbonates. May catalyze (increase the rate of) chemical reactions.

Excerpt from ERG Guide 137 [Substances - Water-Reactive - Corrosive]:

NO water. In case of fire in the surroundings, use appropriate extinguishing media. In case of fire: keep drums, etc., cool by spraying with water. NO direct contact with water.

Fresh air, rest. Half-upright position. Artificial respiration may be needed. Refer for medical attention.

Remove contaminated clothes. Rinse skin with plenty of water or shower. Refer for medical attention .

First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then refer for medical attention.

Rinse mouth. Do NOT induce vomiting. Refer for medical attention .

· CALL 911. Then call emergency response telephone number on shipping paper. If shipping paper not available or no answer, refer to appropriate telephone number listed on the inside back cover.

· Do not touch damaged containers or spilled material unless wearing appropriate protective clothing.

Get medical attention quickly following all exposures to this compound.

General First Aid:

· Wear positive pressure self-contained breathing apparatus (SCBA).

TIH (Toxic Inhalation Hazard) - Term used to describe gases and volatile liquids that are toxic when inhaled. Some are TIH materials themselves, e.g., chlorine, and some release TIH gases when spilled in water, e.g., chlorosilanes. [ERG 2016].

Evacuate danger area! Consult an expert! Personal protection: complete protective clothing including self-contained breathing apparatus. Do NOT absorb in saw-dust or other combustible absorbents. NEVER direct water jet on liquid. Collect leaking and spilled liquid in sealable plastic containers as far as possible. Absorb remaining liquid in sand or inert absorbent. Then store and dispose of according to local regulations.

Excerpt from ERG Guide 137 [Substances - Water-Reactive - Corrosive]:

Immediate precautionary measure

When spilled in water

When spilled in water

Sore throat. Cough. Burning sensation. Shortness of breath. Laboured breathing. Symptoms may be delayed.

Redness. Serious skin burns. Pain.

Redness. Pain. Severe deep burns.

Sore throat. Burning sensation. Nausea. Vomiting. Abdominal cramps. Shock or collapse.

Fluorosulfonic acid

A Commercial Grade

A Placarded Amount

Chemical or material that can be mixed with readily available materials.

Used in the chemical industry as a fluorinating agent and catalyst; Used in electropolishing; [HSDB]

Toxic Gas from Spilling Chemical in Water [Category: Other]

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

IN ELECTROPOLISHING

THORPE, KIRMAN, J CHEM SOC 61: 921 (1892); MEYER, SCHRAMM, Z ANORG ALLGEM CHEM 206: 25 (1932); KWASNIK IN HANDBOOK OF PREPARATIVE INORG CHEM, VOL 1, G BRAUER, ED (ACADEMIC PRESS, NEW YORK, 2ND ED, 1963) PP 177.

REACTION OF ANHYDROUS HYDROGEN FLUORIDE WITH SULFURIC ACID ANHYDRIDE.