二氧化碳
Carbon dioxide · Kohlenstoffdioxid · Dioxyde de carbone · Dióxido de carbono · 二酸化炭素 · ثنائي أكسيد الكربون · Karbon qazı · Въглероден диоксид · Διοξείδιο του άνθρακα · کربن دیاکسید · פחמן דו-חמצני · कार्बन डाईऑक्साइड
| CAS | 124-38-9 |
|---|---|
| EC | 204-696-9 |
| UN | 1013 |
| 分子式 | CO2 |
| 摩尔质量 | 44.009 g/mol |
| 气体或蒸气的相对密度（空气 = 1） | 1.52 |
| GHS | 警告 · H280, H281 |
Carbon dioxide is a one-carbon compound with formula CO2 in which the carbon is attached to each oxygen atom by a double bond. A colourless, odourless gas under normal conditions, it is produced during respiration by all animals, fungi and microorganisms that depend directly or indirectly on living or decaying plants for food. Carbon dioxide appears as a colorless odorless gas at atmospheric temperatures and pressures. Relatively nontoxic and noncombustible. Heavier than air and may asphyxiate by the displacement of air.