Chlorosulfonic acid Chemical Properties

Melting point:

-80°C

Boiling point:

151-152 °C/755 mmHg (lit.)

Density 

1.753 g/mL at 25 °C (lit.)

vapor density 

4 (vs air)

vapor pressure 

1 mm Hg ( 25 °C)

refractive index 

n20/D 1.433(lit.)

Flash point:

158°C

storage temp. 

Room Temperature, under inert atmosphere

solubility 

Miscible with hydrocarbons.

form 

Oily Liquid, Fuming In Air

pka

-6.49±0.15(Predicted)

Specific Gravity

1.753

color 

Yellow to brown

PH Range

1

Water Solubility 

reacts

Sensitive 

Moisture Sensitive

Merck 

14,2165

Stability:

Stable, but reacts violently with water. In case of spills, mop up with sand - do not add water. Reacts with most metals to yield (flammable) hydrogen gas. Incompatible with strong bases, carbonates, water, combustible materials, strong oxidizing agents, most metals, organic materials, sulfides, cyanides, carbides.

LogP

-0.003 at 25℃

CAS DataBase Reference

7790-94-5(CAS DataBase Reference)

EPA Substance Registry System

Chlorosulfonic acid (7790-94-5)

Safety Information

Hazard Codes 

C

Risk Statements 

14-35-37

Safety Statements 

26-45

RIDADR 

UN 1754 8/PG 1

WGK Germany 

1

RTECS 

FX5730000

TSCA 

Yes

HazardClass 

8

PackingGroup 

I

HS Code 

28062000

Hazardous Substances Data

7790-94-5(Hazardous Substances Data)

MSDS

• Language:English Provider:SigmaAldrich
• Language:English Provider:ALFA

Chlorosulfonic acid Usage And Synthesis

Description

Chlorosulfonic acid is a highly corrosive, colorless to yellow, slightly cloudy, fuming liquid with a sharpodor. Molecular weight =115.52; Boiling point =155℃;Freezing/Melting point =-80℃. Hazard Identification(based on NFPA-704 M Rating System): Health 4,Flammability 0, Reactivity 2 . Reactive with water.

Chemical Properties

Chlorosulfonic acid, ClS03H, also known as chlorosulfuric acid and sulfuric chlorohydrin, is an colorless to light yellow oily liquid. It is formed from sulfur trioxide and hydrogen chloride, but decomposes in water to form hydrochloric acid and sulfuric acid.It is a vigorous dehydrating agent and is used in manufacturing synthetic drugs,poison gas, and saccharin.

Chemical Properties

Chlorosulfonic acid is a highly corrosive, colorless to yellow, slightly cloudy, fuming liquid with a sharp odor.

Uses

Chlorosulfuric Acid is used in the preparation of benzothiazepinylphosphonate bile acid transporter inhibitor. Also used in the preparation ofsulfated guar gum for potential use as an antioxidant.

Uses

manufacture of sulfone Compounds, saccharin. As chlorosulfonating and condensing agent in organic syntheses.

Uses

Chlorosulfonic acid is used as detergent and as an anti-contrail agent. It is used as an intermediate in the production of other substances such as pharmaceuticals and chemicals. It finds application in producing smoke screens.

General Description

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.

Reactivity Profile

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, Chlorosulfonic acid 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].

Hazard

Toxic by inhalation; strong irritant to eyes and skin; causes severe burns. Can ignite combustible materials. Evolves hydrogen on contact with most metals.

Health Hazard

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.

Flammability and Explosibility

Non flammable

Safety Profile

A poison irritant. See also SULFURIC ACID. Chlorosulfonic acid is corrosive, can cause severe acid burns and is very irritating to the eyes, lungs, and mucous membranes. It can cause acute toxic effects either in the liquid or vapor state. Inhalation of concentrated vapor may cause loss of consciousness with serious damage to lung tissue. Contact of liquid with the eyes can cause severe burns if the liquid is not immediately and completely removed. It also causes severe sh burns due to its highly corrosive action. Upon ingestion it

Potential Exposure

Used to make pesticides, detergents, pharmaceuticals, dyes, resins, sulfonated oils; intermediate for dyes and pharmaceuticals; and pesticides. Although no military designation has been assigned chlorosulfonic acid may have been used as a choking/pulmonary agent

First aid

If this chemical gets into the eyes, remove anycontact lenses at once and irrigate immediately for at least15 min, occasionally lifting upper and lower lids. Seek medical attention immediately. If this chemical contacts theskin, remove contaminated clothing and wash immediatelywith soap and water. Seek medical attention immediately. Ifthis chemical has been inhaled, remove from exposure,begin rescue breathing (using universal precautions, including resuscitation mask) if breathing has stopped and CPR ifheart action has stopped. Transfer promptly to a medicalfacility. When this chemical has been swallowed, get medical attention. If victim is conscious, administer water ormilk. Do not induce vomiting.

storage

(1) Color Code—White Stripe: Contact Hazard;Store separately; not compatible with materials in solidwhite category. (2) Color Code—Blue: Health Hazard/Poison: Store in a secure poison location. Prior to workingwith chlorosulfonic acid you should be trained on its properhandling and storage. Store in tightly closed containers in acool, well-ventilated area away from water, acids, bases,alcohols, metal powders, and organic combustible materials.It is preferable to store this chemical under nitrogen. Wherepossible, automatically pump liquid from drums or otherstorage containers to process containers.

Shipping

UN1754 Chlorosulfonic acid (with or without sulfur trioxide), Hazard class: 8; Labels: 8-Corrosive material, 6.1-Poison Inhalation Hazard, Inhalation Hazard Zone B.

Purification Methods

Distil the acid in an all-glass apparatus, taking the fraction boiling at 156-158o. It reacts EXPLOSIVELY with water [Cremlyn Chlorosulfonic acid: A Versatile Reagent, Royal Society of Chemistry UK, 2002, p 308, ISBN 0854044981, Fehér in Handbook of Preparative Inorganic Chemistry (Ed. Brauer) Academic Press Vol I p 385 1963].

Incompatibilities

Explosively reacts with water, forming sulfuric and hydrochloric acid and dense fumes. Dangerously reactive, avoid contact with all other material. Violent reaction with many compounds, including reducing agents; alcohols, chemically active metals; combustible materials, strong acids, alkaline earth sulfides, aluminum carbides, aluminum, amines, calcium sulfide, carbides, chlorine trifluoride, glycerin, hydrides, hydrochloric acid, hydrogen peroxide, hydrogen sulfide, hydroxylamine, magnesium, metal powders, metal sulfides, molybdenum, phenylhydrazine, phosphorous red/friction, phosphorous trichloride, silicon, sulfides, sulfur, sulfur dioxide, sulfur/ friction, sulfuric acid, tungsten, hydrogen trisulfide, diphenyl ether, finely divided metals, silver nitrate. Contact with phosphorous may cause fire and explosions. Forms explosive material with ethyl alcohol. Attacks many metals; reaction with steel drums forms explosive hydrogen gas, which must be periodically relieved.

Chlorosulfonic acid(7790-94-5)Related Product Information

• Citric acid
• Folic acid
• Glycine
• Ethyl 2-(Chlorosulfonyl)acetate
• 2-BENZOYLACETANILIDE
• Thionyl chloride
• Ascoric Acid
• ETHYL CHLOROSULFONATE
• Chlorosulfonic acid (trimethylsilyl) ester,Chlorosulfonic acid trimethylsilyl ester
• PYROSULFURYL CHLORIDE
• Chlorosulfonic acid
• Chloromethyl chlorosulfate
• Chlorosulfonyl isocyanate
• Tosyl chloride
• Methylene bis-(chlorosulfate) (MBCS)
• Diacetonefructose chlorosulfate
• Methyl chlorosulfonate
• CHLOROSULFONIC ACID TRIFLUOROVINYL ESTER