Sulfur trioxide
三氧化硫
Also known as: EINECS 231-197-3, MFCD00011452, Oxosulfane dioxide, SO3, SULFAN(R), SULFUR TRIOXIDE, SULFUR TRIOXIDE, 99%, PACKAGED IN AMPULES, STABILIZED, SULFURIC ANHYDRIDE, SULPHUR TRIOXIDE, Schwefeltrioxid, Sulfan, Sulfur oxide (SO3), Sulfur(VI) trioxide, Sulfuric oxide, sulfur trioxide, sulfur(VI) oxide, sulfuric acid anhydride
- CAS No.
- 7446-11-9
- Jingsj CID
- J-46665-7
- Molecular Formula
- O3S
- Chinese Name
- 三氧化硫
- Molecular Weight
- 80.06320 g/mol
- Category
- Inorganic Chemicals
- Last updated
- 8/21/2026
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Request a quotePhysicochemical Properties
| Melting Point | 16.8 °C(lit.) |
|---|---|
| Boiling Point | 44.8 °C |
| Density | 1.97 g/mL at 25 °C(lit.) |
GHS Safety & Compliance
Corrosion / IrritantSignal word: Danger
Frequently Asked Questions
What is the CAS number of Sulfur trioxide?
7446-11-9
What are the molecular formula and molecular weight of Sulfur trioxide?
O3S, molecular weight 80.06320 g/mol
Is Sulfur trioxide hazardous?
Danger
Data compiled from public chemical databases and supplier catalogs; verify specifications with suppliers before purchase. · Last updated: 8/21/2026