Description

Fuming Sulfuric Acid, also known as oleum, is a highly reactive and concentrated solution of sulfur trioxide in sulfuric acid. Its powerful sulfonating and dehydrating properties make it an indispensable reagent for creating complex chemical intermediates and industrial processes. This product is essential for manufacturers in the chemical synthesis, petroleum refining, and specialty materials sectors who require a potent and reliable source of SO3.

Application

• Sulfonation & Sulfation Agent: Key intermediate in the production of detergents, dyes, and pharmaceuticals.
• Petroleum Refining: Used in alkylation processes to produce high-octane gasoline components.
• Chemical Synthesis: Acts as a powerful dehydrating and condensing agent in organic synthesis.
• Explosives Manufacturing: Employed in the production of nitroglycerin and other nitro compounds.
• Caprolactam Production: A critical reagent in the synthesis of nylon-6 precursor.
• Laboratory Reagent: Used in analytical chemistry and research for specialized reactions.

Basic Information

Product Name	Fuming Sulfuric Acid
CAS No.	8014-95-7
Molecular Formula	H2SO4·xSO3
Molecular Weight	Varies with SO3 concentration
Synonyms	Oleum; Sulfuric acid fuming; Disulfuric acid (mixture with SO3); Pyrosulfuric acid; Nordhausen acid; Sulfur trioxide-sulfuric acid; Fuming oil of vitriol; SO3-H2SO4
EINECS	232-409-3

Quality Control

Our Fuming Sulfuric Acid is manufactured under stringent process controls to ensure batch-to-batch consistency and high purity. Quality is verified through a comprehensive suite of analytical tests, including titration for total acidity and SO3 content, and impurity profiling. A Certificate of Analysis (COA) detailing all specifications is provided with each shipment to guarantee compliance with your technical requirements.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area away from incompatible materials such as organic compounds, strong bases, and metals. Due to its nature as a strong acid/organic solvent and strong oxidizer, containers must be kept tightly sealed to prevent absorption of moisture and fuming. Storage temperature should be maintained at ambient conditions (15-25°C).

Specification

Item	Specification
Appearance	Colorless to slightly brown fuming liquid
Identification (IR)	Conforms
Assay (Total as H2SO4)	Min. 98.0%
Free SO3 Content	20-65% (Various grades available)
Iron (Fe)	Max. 10 ppm
Heavy Metals (as Pb)	Max. 5 ppm
Residue on Ignition	Max. 0.01%

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.