Disulfuric acid

Base Information

• Chemical Name: Disulfuric acid
• CAS No.: 7783-05-3
• Molecular Formula: H2O7S2
• Molecular Weight: 178.144
• European Community (EC) Number: 231-976-8
• UNII: NTC1O8E83E
• DSSTox Substance ID: DTXSID7064817
• Nikkaji Number: J95.802F
• Wikipedia: Disulfuric_acid,Pyrosulfuric acid
• Wikidata: Q420720
• ChEMBL ID: CHEMBL1205545
• Mol file: 7783-05-3.mol

Synonyms:pyrosulfuric acid;pyrosulfuric acid, diammonium salt;pyrosulfuric acid, dipotassium salt;pyrosulfuric acid, disodium salt;pyrosulfuric acid, potassium salt;sodium pyrosulfate

Chemical Property of Disulfuric acid

Chemical Property:

• Melting Point: 35°
• PSA: 134.73000
• Density: 1.89
• LogP: 0.77020
• XLogP3: -1.8
• Hydrogen Bond Donor Count: 2
• Hydrogen Bond Acceptor Count: 7
• Rotatable Bond Count: 2
• Exact Mass: 177.92419475
• Heavy Atom Count: 9
• Complexity: 221

Purity/Quality:

99%, ^*data from raw suppliers

Safty Information:

• Pictogram(s):  
• Hazard Codes: 

MSDS Files:

SDS file from LookChem

Useful:

• Canonical SMILES: OS(=O)(=O)OS(=O)(=O)O
• Description: Disulfuric acid has the molecular formula of H2S2O7 where the S-atom is in the＋5 oxidation state. It is a major constituent of fuming sulfuric acid (also known as “oleum”) described by the formula ySO3·H2O where y is the total molar sulfur trioxide content. They can also be described by the formula: H2SO4·xSO3, which are also minor constituents of liquid anhydrous sulfuric acid due to the equilibria: H2O＋SO3→H2SO4＋SO3→H2S2O7 Thus, the disulfuric acid is prepared by reacting excess SO3 with sulfuric acid: H2SO4＋SO3→H2S2O7 Disulfuric acid is a strong acid and protonates sulfuric acid in the (anhydrous) sulfuric acid solvent system. An alternative IUPAC name is (sulfo-oxy)sulfonic acid.

Technology Process of Disulfuric acid

There total 11 articles about Disulfuric acid which guide to synthetic route it. The literature collected by LookChem mainly comes from the sharing of users and the free literature resources found by Internet computing technology. We keep the original model of the professional version of literature to make it easier and faster for users to retrieve and use. At the same time, we analyze and calculate the most feasible synthesis route with the highest yield for your reference as below:

synthetic route:

Reference yield:

sulfur trioxide (7446-11-9) → disulfuric acid (7783-05-3)

Guidance literature:

With sulfuric acid; In sulfuric acid; mixture of liquid SO3 with concd. H2SO4 in suitable ratio;; cryst. H2S2O7 obtained;;

Reference yield:

aminosulfonic acid (5329-14-6) → ammonia (7664-41-7) + disulfuric acid (7783-05-3)

Guidance literature:

With sulfuric acid; In neat (no solvent); heating (5 min/147°C);;

Reference yield:

chlorosulfonic acid (7790-94-5) → hydrogenchloride (7647-01-0,15364-23-5) + disulfuric acid (7783-05-3)

Guidance literature:

With H₂SO₄; In neat (no solvent); excess of of H2SO4;;

DOI:10.1039/JS8692200304

upstream raw materials:

sulfur trioxide

oxygen

sulfur

water

Downstream raw materials:

4-aminobenzene sulfonic acid

sulfuric acid

Nitrogen dioxide

manganese(IV) oxide

Refernces