Synonyms: Oleum
CAS Number: 8014-95-7
Formula: H2O4S
Formula Weight: 98.08
Linear Formula: H2SO4 · (SO3)x
MDL No.: MFCD00137792
Purity: 20% free SO3 basis
Density: 1.925 g/mL at 25 C(lit.)
Beilstein Registry Number: 2037554
UNSPSC Code: 12352106
General description: Fuming sulfuric acid is an inorganic acid, that can be produced by the addition of sulfur trioxide to concentrated sulfuric acid. It is commonly used as a sulfonating reagent in sulfonation reactions. When fuming sulfuric acid is employed as reaction medium, bromination takes place only in the pyridine nucleus of isomeric methylpyridines and 2,6-dimethylpyridine. It can also oxidize fullerene C60 to form fullerene polymers.
Application: Fuming sulfuric acid may be used as a sulfonating agent for the synthesis of: . sulfonated poly(1,4-phenylene sulfide) . water-soluble polyphosphazene polyelectrolyte . sulfated graphene
RTECS: WS5605000
RIDADR: UN1831- class 8 - PG 1- Sulfuric acid, fuming with less than 30 percent free sulfur trioxide
WGK Germany: 1
R Codes: 14-35-37
S Codes: 26-30-45
IOD Codes: C
Symbol: GHS05, GHS06
Signal Word: Danger
Hazard Statements: H314-H330-H335
Precautionary statements: P260-P280-P284-P305 + P351 + P338-P310