CAS 8014-95-7 Sulfur Trioxide Solution Fuming Sulfuric Acid

Fuming sulfuric acid

Sulfuric acid,mixt. with sulfur trioxide;Sulfur trioxide,mixt. contg.;Oleum;Sulfuric acid fuming;Fuming sulfuric acid;Oleum iodisum;17107-61-8

8014-95-7

H2O4S.O3S

InChIKey=HIFJUMGIHIZEPX-UHFFFAOYSA-N

178.14

177.92400

231-639-5

1447

1831

DTXSID5064889

Colorless or slightly colored, viscous liquid|Heavy, oily liquid; colorless to dark brown depending on purity|Heavy, fuming, yellow liquid

2807000090

Inorganic Acid

135

0.71980

Colorless Liquid

1.9 g/cm³

2 °C

~290 °C(lit.)

Miscible with water.

Store below +30°C.

1 mm Hg ( 146 °C)

<0.3 (25 °C, vs air)

Inhalation-Rat LC50: 347 PPM/1 hour

In case of H, the pore-forming agent is flammable; in case of cyanide, it emits highly toxic hydrogen cyanide gas; in the case of flammable organic matter burning or exploding; heat produces toxic sulfur oxide fumes

Risk of fire and explosion on contact with base(s), combustible substances, reducing agents or water.

38 mPa-sec at 25 °C /30% SO3, wt % (% Oleum)/|Fumes strongly in moist air. Extremely hygroscopic. Reacts violently with water.|Consists of sulfuric acid and up to 80% sulfur trioxide|Heat capacity: 1.55 kJ/kg-K at 20 °C /50% SO3, wt % (% Oleum)/|COMBINATION WATER - 18.37% FREE SULFUR TRIOXIDE - 0%, TOTAL SULFUR TRIOXIDE - 81.63%; AMOUNT OF SULFUR TRIOXIDE WITH 100% SULFURIC ACID

Fumes in air. Soluble in water; dissolution generates dangerous amounts of heat that can cause localized boiling and spattering of the acidic mixture and generate heavy fumes, mists. During sulfonation of mononitrobenzene with fuming sulfuric acid, a leak from an internal cooling coil permitted water to enter the reaction tank. A violent eruption occurred due to the heat of solution [MCA Case History 944(1963)].

Acids, Strong Oxidizing

Strong Oxidizing Agent

OLEUM, WITH LESS THAN 30% FREE SULFUR TRIOXIDE reacts as a strong acid, as an oxidizing agent and as a dehydrating agent. Chars wood, sugar and many other organic materials on contact. The heat from these reactions may ignite the wood, sugar or organic matter. May react explosively with acetic acid, acetic anhydride, acetonitrile, acrolein, acrylic acid, acrylonitrile, allyl alcohol, allyl chloride, ammonium hydroxide, aniline, cresol, butyraldehyde, cumene, ethyl acetate, ethylene diamine, ethylene glycol, glyoxal, isoprene, isopropyl alcohol, methyl ethyl ketone, propylene oxide, pyridine, styrene, vinyl acetate; strong bases (sodium hydroxide, potassium hydroxide) or mineral acids (nitric acid, hydrochloric acid, hydrofluoric acid) [Lewis, 3rd ed., 1993, p. 1195]. Mixing in equal molar portions with any of the following substances in a closed container caused the temperature and pressure to increase: 2-aminoethanol, ammonium hydroxide (28%), chlorosulfonic acid, ethylenediamine, ethyleneimine, ethylene cyanohydrin, hydrochloric acid (36%), hydrofluoric acid (48.7%), isopropyl alcohol, nitric acid (70%), 2-nitropropane, propiolactone, propylene oxide, pyridine, styrene monomer, sodium hydroxide, sulfolane, vinyl acetate, vinylidene chloride [NFPA 1991]. Extremely hazardous in contact with carbides, bromates, chlorates, fulminates, picrates, and powdered metals. May induce violent polymerization in polymerizable organic compounds such as allyl chloride. Reacts exothermically with sodium hypochlorite to produce chlorine gas.

Not flammable (USCG, 1999)

The vapour is heavier than air.

Extremely corrosive