Sulfur trioxide (CAS 7446-11-9) — formula O3S, molecular weight 80.07; category inorganic chemicals.
Sulfur trioxide (CAS 7446-11-9) is a chemical raw material in the inorganic chemicals category. Its molecular formula O3S comprises 3 O, 1 S atoms. Its molecular weight is about 80.07. Reported physicochemical data: melting point around 62.2 °C, boiling point around 44.8 °C, LogP about -0.5. As a sourcing and distribution partner we help locate and compare this item across domestic and cross-border channels, arranging samples and batch orders with full COA and compliance files.
| CAS Number | 7446-11-9 |
|---|---|
| Molecular Formula | O3S |
| Molecular Weight | 80.07 |
| Melting Point | 62.2 °C |
| Boiling Point | 44.8 °C |
| LogP | -0.5 |
| Applications | sulfonating agent in the production of detergents and an intermediate in the production of sulfuric acid and explosives, Intermediate in sulfuric acid manufacture, in sulfonations for formation of addition cmpd with amines, in the manufacture of explosives, Sulfonation of organic compounds, especially nonionic detergents |
| Category | Inorganic Chemicals |
Documented applications: sulfonating agent in the production of detergents and an intermediate in the production of sulfuric acid and explosives, Intermediate in sulfuric acid manufacture, in sulfonations for formation of addition cmpd with amines, in the manufacture of explosives, Sulfonation of organic compounds, especially nonionic detergents.
Sulfur trioxide is an inorganic compound with CAS registry number 7446-11-9 and molecular formula O3S (molecular weight 80.07), belonging to the inorganic chemicals segment of chemical raw materials.
CAS number: 7446-11-9
Its molecular formula O3S comprises 3 O, 1 S atoms.
Also known as: Sulfur trioxide · 三氧化硫
Category: inorganic chemicals
The CAS registry number of Sulfur trioxide is 7446-11-9.
Molecular formula O3S, molecular weight 80.07.
It is also registered under: Sulfur trioxide, 三氧化硫.
Recorded applications: sulfonating agent in the production of detergents and an intermediate in the production of sulfuric acid and explosives, Intermediate in sulfuric acid manufacture, in sulfonations for formation of addition cmpd with amines, in the manufacture of explosives, Sulfonation of organic compounds, especially nonionic detergents.
Category: Inorganic Chemicals.
Packaging is agreed per order, from lab-scale packs to bulk, and confirmed with each order rather than fixed on the page. A Certificate of Analysis (COA) ships with every batch and MSDS is available; where the end use carries a regulatory limit (food contact, pharmaceutical or cosmetic), state the standard at enquiry and the grade is set against it.
Independent reference data for Sulfur trioxide (CAS 7446-11-9), compiled from public chemistry databases.
| CAS Registry Number | 7446-11-9 |
|---|---|
| PubChem CID | 24682 |
| Molecular formula | O3S |
| IUPAC name | sulfur trioxide |
| UNII (FDA) | HH2O7V4LYD |
| Molecular Weight | 80.07 |
|---|---|
| XLogP3 | -0.5 |
| Hydrogen Bond Donor Count | 0 |
| Hydrogen Bond Acceptor Count | 3 |
| Rotatable Bond Count | 0 |
| Exact Mass | 79.95681503 |
| Monoisotopic Mass | 79.95681503 |
| Topological Polar Surface Area | 52.2 |
| Heavy Atom Count | 4 |
| Boiling Point | 44.8 °C |
|---|---|
| Melting Point | 62.2 °C |
| Melting Point | 17 °C |
| Vapor Density | 2.76 (Air = 1) |
| Vapor Pressure | 263.0 [mmHg] |
| Heat of Vaporization | 43.14 kJ/mol at 25 °C |
SULFUR TRIOXIDE; 7446-11-9; Sulphur trioxide; Sulfur oxide (SO3); HH2O7V4LYD; DTXSID1029673; CHEBI:29384; Sulfan; Sulfuric oxide; RefChem:6276; Sulfur trioxide, stabilized; DTXCID409673; 231-197-3; Sulfuric anhydride; Sulfite radical anion; Sulfur trioxide, contains stabilizer, >=99%
| GHS notification summary | 14.9% (75 / 503) |
|---|
| GHS notification summary | 14.9% (75 / 503) |
|---|---|
| Reported hazard statements | H314 (85.1%), H318 (49.3%), H330 (16.1%), H335 (79.9%), H351 (11.3%), H411 (11.3%) |
This chemical does not meet GHS hazard criteria for 14.9% (75 of 503) of reports.
H314 (85.1%): Causes severe skin burns and eye damage [Danger Skin corrosion/irritation]
Sulfur trioxide · CAS 7446-11-9 · O3S. UNII HH2O7V4LYD. Boiling Point: 44.8 °C; Melting Point: 62.2 °C; Melting Point: 17 °C.
Source: PubChem / Wikidata; the batch COA governs where values differ.
Supplier: Jinan Shenghe Chemical Co., Ltd.
中文页面: 三氧化硫