Laboratory Safety Symbols, Signs, and Meanings

General Warning

Presence of possibly hazardous materials/environment

Health Hazard

Presence of chemical, physical, or biological factors with the potential to have a negative effect on our health

Biological Hazard

Presence of Biohazardous materials

Biosafety Level 1

Presence of organisms that usually don’t cause disease in healthy adults but are capable of causing infections, have a minimum potential hazard to environment and laboratory personnel, and have effective treatment measures

Biosafety Level 2

Presence of organisms capable of causing mild infections, having moderate potential hazard to the environment and laboratory personnel, difficult to spread forming aerosol, and having effective treatment/preventive measures