CHLOROSULFONIC ACID

A colorless to yellow colored fuming liquid with a pungent odor. Density 14.7 lb / gal. Causes severe burns. Very toxic by inhalation. Corrosive to metals.

• Strong Oxidizing Agent
• Water-Reactive
• Air-Reactive

Reacts exothermically and violently with water producing sulfuric acid, hydrochloric acid, and large quantities of dense white acid fumes [Merck, 11th ed., 1989]. Contact with water and metal produces explosive hydrogen gas [USCG, 1999]. Chlorosulfonic acid reacts vigorously with water to generate gaseous HCl. In experiments at Argonne National Laboratory, in which it was mixed with water and stirred at room conditions, about 85 percent of the theoretical yield of HCl evolved as a gas in the first 0.4 minutes [Brown, D. F., et al. (2000) Development of the Table of Initial Isolation and Protective Action Distances for the 2000 Emergency Response Guidebook, ANL-DIS-00-1, Argonne National Laboratory, Argonne IL].

Special Hazards of Combustion Products: Decomposes into irritating and toxic gases

Behavior in Fire: Although nonflammable, it may ignite other combustibles. Contact with water AND metal produces explosive hydrogen gas. (USCG, 1999)

INHALATION: vapor extremely irritating to lungs and mucous membranes. Vapor has such a sharp and pentrating odor that inhalation of severely toxic quantities is unlikely unless it is impossible to escape the fumes. CONTACT WITH EYES OR SKIN: liquid acid will severely burn body tissue. (USCG, 1999)

CHLOROSULFONIC ACID is a strong oxidizing acid. Reacts violently with water, strong mineral acids and bases, alcohols, finely dispersed organic matter. Dangerously incompatible with combustible materials, nitrates, chlorates, metallic powders, carbides, picrates, and fulminates. Undergoes possibly violent reactions with acetic acid, acetic anhydride, acetonitrile, acrolein, acrylic acid, acrylonitrile, alkali, allyl alcohol, allyl chloride, ammonium hydroxide, aniline, butyraldehyde, cresol, cumene, diethyleneglycol methyl ether, diisopropyl ether, diphenyl ether, ethyl acetate, ethyl acrylate, ethylene chlorohydrin, ethylenediamine, ethylene glycol, glyoxal, hydrocarbons (hexane, heptane), hydrogen peroxide, isoprene, powdered metals, methyl ethyl ketone, propylene oxide, vinyl acetate. When heated to decomposition, it emits toxic fumes of hydrogen chloride and oxides of sulfur [Sax, 9th ed., 1996, p. 831]. Reaction with phosphorus accelerates out of control and culminates in an explosion [Heumann, K. et al., Ber., 1882, 15, p. 417]. Mixing chlorosulfuric acid and 98% sulfuric acid may evolve HCl [Subref: Anon, Loss Prev. Bull. 1977, (013), 2-3].

• Acids, Inorganic Oxidizing

Do not use water on material itself. 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. (AAR, 2003)

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. Vapor knockdown water is corrosive or toxic and should be diked for containment. Land spill: Dig a pit, pond, lagoon, holding area to contain liquid or solid material. Dike surface flow using soil, sand bags, foamed polyurethane, or foamed concrete. Absorb bulk liquid with fly ash or cement powder. Neutralize with agricultural lime (CaO), crushed limestone (CaCO3) or sodium bicarbonate (NaHCO3). Dilute slowly with water. Water spill: Neutralize with agricultural lime (CaO), crushed limestone (CaCO3), or sodium bicarbonate (NaHCO3). (AAR, 2003)

Acid-proof goggles or a rubber hood, long rubber gloves, rubber shoes, long rubber apron, shirt and trousers of wool or acrylic fiber, and a hat with a brim. For emergency use involving considerable exposure, a complete rubber suit with hood, gloves and boots of rubber should be used. In case of fire use self-contained breathing apparatus. (USCG, 1999)

_____Dupont Average Standardized Breakthrough Times_____
(for CHLOROSULFONIC ACID)

Tychem® BR
     180 min.  (concentration:  95+%)
Tychem® CPE
     150 min.  (concentration:  95+%)
Tychem® CPF2
     greater than 480 min.  (concentration:  95+%)
Tychem® CPF3
     330 min.  (concentration:  99%)
Tychem® CPF4
     greater than 480 min.  (concentration:  95+%)
Tychem® LV
     180 min.  (concentration:  95+%)
Tychem® Reflector®
     180 min.  (concentration:  95+%)
Tychem® Responder®
     greater than 480 min.  (concentration:  99%)
     greater than 480 min.  (concentration:  95+%)
Tychem® Responder® CSM
     greater than 480 min.  (concentration:  99%)
     greater than 480 min.  (concentration:  95+%)
Tychem® SL
     greater than 480 min.  (concentration:  95+%)
Tychem® ThermoPro
     greater than 480 min.  (concentration:  100%)
Tychem® TK
     greater than 480 min.  (concentration:  95+%)  (DuPont, 2008)

Copyrighted information of E.I. du Pont de Nemours and Company. Tychem® is a registered trademark of E.I. du Pont de Nemours and Company.

Call a physician in all cases.

INHALATION: remove victim to fresh air; if he is not breathing, apply artificial respiration; give oxygen if breathing is difficult; do NOT induce vomiting.

SKIN: flush with plenty of water for at least 15 min. while removing contaminated clothing and shoes. (USCG, 1999)

• ACIDE CHLOROSULFONIQUE (DOT FRENCH)
• ACIDO CLOROSULFÓNICO (DOT SPANISH)
• CHLOROSULFURIC ACID
• CHLOROSULFURIC ACID {CHLOROSULFONIC ACID}
• CHLOROSULPHONIC ACID
• CHLORSULFONIC ACID
• MONOCHLOROSULFONIC ACID
• MONOCHLOROSULFURIC ACID
• SULFURIC ACID CHLOROHYDRIN
• SULFURIC CHLORHYDRIN
• SULFURIC CHLOROHYDRIN