危险性符号（Hazard symbols）是用来标识化学品和其他物品危险性的符号。

括号内为该符号的Unicode编码。

• 有毒（U+2620）

• 注意（U+2621）

• 放射性（U+2622）

• 电离辐射

• 非游离辐射

• 生物性危害（U+2623）

• 警告（⚠ ，U+26A0）

• 高压电（⚡，U+26A1）

• 磁场

• 化学武器

• 激光

• 光辐射

• 海啸

Hazard symbols or warning symbols are recognizable symbols designed to warn about hazardous materials, locations, or objects, including electric currents, poisons, and radioactivity. The use of hazard symbols is often regulated by law and directed by standards organizations. Hazard symbols may appear with different colors, backgrounds, borders and supplemental information in order to specify the type of hazard. Warning symbols are used in many places in lieu of or addition to written warnings as they are quickly recognized (faster than reading a written warning) and more universally understood (the same symbol can be recognized as having the same meaning to speakers of different languages).