What color is the oxygen cylinder?

What color is the oxygen cylinder?

• A. Green
• B. Red
• C. Blue
• D. Yellow

Answer: (A)

Color coding of gas cylinders is a safety cue to quickly identify contents and prevent mix-ups when connecting regulators or delivering gases. Oxygen cylinders are green under the standard hospital color code, which helps clinicians recognize O2 at a glance. This visual cue, along with the label on the cylinder, supports safe handling and administration. Other colors are used for other gases—blue for nitrous oxide, yellow for medical air—so while color helps, always verify the label and content data before use.

Color coding of gas cylinders is a safety cue to quickly identify contents and prevent mix-ups when connecting regulators or delivering gases. Oxygen cylinders are green under the standard hospital color code, which helps clinicians recognize O2 at a glance. This visual cue, along with the label on the cylinder, supports safe handling and administration. Other colors are used for other gases—blue for nitrous oxide, yellow for medical air—so while color helps, always verify the label and content data before use.