pyrosulfuric acid
- CAS No.
- 7783-05-3
- Chemical Name:
- pyrosulfuric acid
- Synonyms
- Disulfuric acid
- CBNumber:
- CB31316109
- Molecular Formula:
- H2O7S2
- Molecular Weight:
- 178.14
- MOL File:
- 7783-05-3.mol
- Modify Date:
- 2023/5/9 9:30:37
| Melting point | 35° |
|---|---|
| Density | 1.89 |
| EPA Substance Registry System | Disulfuric acid (7783-05-3) |
SAFETY
Risk and Safety Statements
| Symbol(GHS) |   GHS07,GHS05 |
|---|---|
| Signal word | Danger |
| Hazard statements | H335-H314 |
| Precautionary statements | P260-P264-P280-P301+P330+P331-P303+P361+P353-P363-P304+P340-P310-P321-P305+P351+P338-P405-P501 |
pyrosulfuric acid Chemical Properties,Uses,Production
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.
pyrosulfuric acid Preparation Products And Raw materials
Global( 4)Suppliers
| Supplier | Tel | Country | ProdList | Advantage | Inquiry |
|---|---|---|---|---|---|
| Henan Tianfu Chemical Co.,Ltd. | +86-0371-55170693 +86-19937530512 | China | 21675 | 55 | Inquiry |
| Hu Bei Jiutian Bio-medical Technology CO.,Ltd | 027-88013699 17354350817 | China | 7432 | 58 | Inquiry |
| Shaanxi DIDU pharmaceutical and Chemical Co., Ltd | 17691182729 18161915376 | China | 10011 | 58 | Inquiry |
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Disulfuric acid
7783-05-3