Fuming sulfuric acid, also known as oleum, is a highly concentrated form of sulfuric acid that contains dissolved sulfur trioxide (SO3). It is characterized by its dense, oily consistency and is typically a colorless to yellowish liquid. Fuming sulfuric acid is highly corrosive and can cause severe burns upon contact with skin or mucous membranes. It has a strong, pungent odor and is hygroscopic, meaning it readily absorbs moisture from the air. This substance is primarily used in the production of sulfuric acid, as well as in various chemical processes, including sulfonation reactions. Due to its reactivity, fuming sulfuric acid must be handled with extreme caution, using appropriate personal protective equipment and working in a well-ventilated area or fume hood. Its ability to release sulfur trioxide makes it a potent dehydrating agent, and it can react violently with water, releasing heat and producing a dense, corrosive mist. Proper storage in tightly sealed containers is essential to prevent exposure to moisture and air.

Fuming sulfuric acid

8014-95-7: Acid Mist, BOU, Battery acid, Dipping Acid, Fuming sulfuric acid, Hsdb 1236, Hydrogen sulfate, Oil of vitriol, Oleum, Oleum (Fuming Sulfuric acid), Oleum 65% by weight or more free sulfur trioxide (SO3), Oleum iodisum, Oxosulfane Dioxide - Sulfuric Acid (1:1), Óleo, Sulfate acid, Sulfur acid, Sulfur trioxide, mixt. contg., Sulfur trioxide, mixt. with sulfuric acid, Sulfuric, Sulfuric acid (98%), Sulfuric acid for storage battery, Sulfuric acid mixture with sulfur trioxide, Sulfuric acid, fuming (20%), Sulfuric acid, fuming > or =30% free sulfur trioxide, Sulfuric acid, fuming > or =30% free sulfur trioxide [UN1831]  [Corrosive], Sulfuric acid, mixt with sulfur trioxide, Sulfuric acid, spent, Sulfuric acid, standard solution, Sulfuric acid,fuming, Sulphuric acid, Un1831, Vitriol Brown Oil, 発煙硫酸

This Thermo Scientific Chemicals brand product was originally part of the Acros Organics product portfolio. Some documentation and label information may refer to the legacy brand. The original Acros Organics product / item code or SKU reference has not changed as a part of the brand transition to Thermo Scientific Chemicals.

CAS 8014-95-7: Fuming sulfuric acid

Sulfuric acid, extra pure, fuming, 20-30% free SO3

Ref: AC-41997