三酸化硫黄
Сумпор триоксид · Sulfur trioxide · Trioxyde de soufre · ثلاثي أكسيد الكبريت · Sulfat anhidridi · Серен триоксид · Schwefeltrioxid · Τριοξείδιο του θείου · Óxido de azufre · تری اکسید سولفور · Kén-trioxid · Belerang trioksida
| CAS | 7446-11-9 |
|---|---|
| EC | 231-197-3 |
| UN | 1829 |
| 化学式 | SO3 |
| モル質量 | 80.07 g/mol |
| ガスまたは蒸気の相対密度（空気 = 1） | 2.76 |
| GHS | 危険 · H314, H318, H330, H335, H351, H411 |
Sulfur trioxide is a sulfur oxide. Sulfur trioxide, is a colorless to white crystalline solid which will fume in air. Often shipped with inhibitor to prevent polymerization. It reacts violently with water to form sulfuric acid with the release of heat.