Nitrosylsulfuric acid

Nitrosylsulfuric acid
Structural formula of nitrosylsulfuric acid
Ball-and-stick model of the nitrosylsulfuric acid molecule
Names
IUPAC name
Nitrosylsulfuric acid
Other names
nitrosonium bisulfate, chamber crystals
Identifiers
3D model (JSmol)
ChemSpider
ECHA InfoCard 100.029.058 Edit this at Wikidata
UNII
  • InChI=1S/HNO5S/c2-1-6-7(3,4)5/h(H,3,4,5) checkY
    Key: VQTGUFBGYOIUFS-UHFFFAOYSA-N checkY
  • InChI=1/HNO5S/c2-1-6-7(3,4)5/h(H,3,4,5)
    Key: VQTGUFBGYOIUFS-UHFFFAOYAM
  • O=NOS(=O)(=O)O
Properties
HSO4NO
Molar mass 127.08 g/mol
Appearance Pale yellow crystals[1]
Density 1.865 g/mL in
40% sulfuric acid soln [2]
Melting point 70 °C (158 °F; 343 K)[1]
Boiling point Decomposes
Decomposes
Solubility Soluble in H2SO4[1]
Hazards
Occupational safety and health (OHS/OSH):
Main hazards
 Oxidizer
Related compounds
Other anions
 NOCl
Other cations
 NaHSO4
Related compounds
 NOBF4
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Nitrosylsulfuric acid is the chemical compound with the formula HSO4NO. It is a colourless solid that is used industrially in the production of caprolactam,[3] and was formerly part of the lead chamber process for producing sulfuric acid. The compound is the mixed anhydride of sulfuric acid and nitrous acid.

In organic chemistry, it is used as a reagent for nitrosating, as a diazotizing agent, and as an oxidizing agent.[1]

  1. ^ a b c d George A. Olah, G. K. Surya Prakash, Qi Wang, Xing-Ya Li (2001). "Nitrosylsulfuric Acid". Encyclopedia of Reagents for Organic Synthesis. doi:10.1002/047084289X.rn060. ISBN 978-0471936237. {{cite book}}: |journal= ignored (help)CS1 maint: multiple names: authors list (link)
  2. ^ "Nitrosylsulfuric acid solution". Merck.
  3. ^ Ritz, J.; Fuchs, H.; Kieczka, H.; Moran, W. C. (2002). "Caprolactam". Ullmann's Encyclopedia of Industrial Chemistry. Weinheim: Wiley-VCH. doi:10.1002/14356007.a05_031. ISBN 978-3527306732.