send us an inquiry
LC5633 Sulfuric acid fuming 65% SO3
extra pure


Order number Packaging Quantity Price €
AC32633 Glass btl. pl.coat. 1 L inquire


Product information
Synonyms Oleum
Hill Formula H2O4S*SO3 (1:2)
Chemical formula H2SO4*SO3 (1:2)
HS Code 2807 00 90
EC number 231-976-8
Molar mass 258.20 g/mol
EC index number 016-019-00-2
CAS number 8014-95-7


Chemical and physical data
Solubility (20 °C) soluble,(caution ! development of heat)
Melting point 1 °C
Molar mass 258.20 g/mol
Density 1.99 g/cm3 (20 °C)
pH value < – 1 (100 g/l, H2O, 20 °C) strongly acid
Boiling point 64 °C
Vapor pressure 105 hPa (20 °C)


Safety information
R Phrase R 14-35-37
Reacts violently with water.Causes severe burns.Irritating to respiratory system.
S Phrase S 26-30-45
Categories of danger corrosive
Hazard Symbol Corrosive
RTECS WS5605000
Storage class 8 B Non combustible, corrosive substances
WGK WGK 1 slightly water endangering
Disposal 12
Inorganic acids and anhydrides thereof should first be diluted or hydrolyzed by stirring carefully into ice water and then neutralized (protective gloves, fume cupboard!) with sodium hydroxide solution (Cat. No. 105587). Before filling into container D, check the pH with pH universal indicator strips (Cat. No. 109535). Fuming sulfuric acid should be carefully stirred dropwise into 40 % sulfuric acid (Cat. No. 109286). Ensure that plenty of ice is available for cooling! When sufficiently cool, treat the highly concentrated sulfuric acid as described above. Analogous to this procedure, other anhydrides can be converted into their corresponding acids. Acid gases (e.g. hydrogen halide, chlorine, phosgene, sulfur dioxide) can be introduced into dilute sodium hydroxide solution and after neutralization disposed of in container D.


Transport information
Declaration (transport by sea) IMDG-Code UN 1831 SULPHURIC ACID, FUMING, 8 (6.1), I, Segregation Group: 1 (Acids)
Declaration (transport by air) IATA-DGR UN 1831 SULPHURIC ACID, FUMING, 8 (6.1),