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270113 
Sigma-Aldrich 

Sulfuric acid, fuming 

ACS reagent, 30% free SO3 basis  
  1 of 1  
      
 
Synonym 
Oleum
 
Molecular Formula
H2SO4 · (SO3)x
 
Molecular Weight
98.08
 
CAS Number 
8014-95-7
Beilstein Registry Number 
2037554

 
MDL number 
MFCD00137792

 
PubChem Substance ID 
24856355

 
 
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Price and Availability
Descriptions
Packaging  
25 g in glass btl
 
Properties
grade 
ACS reagent
 
vapor density 
3 (vs air)
 
vapor pressure 
2 mmHg ( 25 °C)
 
assay 
26.0-29.5% free SO3 basis (ACS specification)
 
 
30% free SO3 basis
 
ign. residue  
≤0.002%
 
color 
colorless to very light brown
 
density 
1.925 g/mL at 25 °C(lit.)
 
anion traces 
nitrate (NO3-): ≤1 ppm
 
cation traces 
As: ≤0.03 ppm
 
 
Fe: ≤2 ppm
 
 
NH4+: ≤3 ppm
References
Merck 
Merck 13,9064
 
reference 
RegBook 1 (3), 3249:J / RegBook 1 (3), 3249:I / RegBook 1 (3), 3249:H / Sax 6, 2489
Safety
Hazard Codes 

 
Risk Statements 

 
Safety Statements 

 
RIDADR 
UN 1831 8/PG 1
 
WGK Germany 
1
 
RTECS 
WS5605000
 
F 

Related Categories

 
   Related Information
 
MSDS
 
Specification Sheet
 
Certificate of Analysis

 
 
Certificate of Origin

 
 
 
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