Proper labeling ensures that hazards in a laboratory or work location are communicated and easily identifiable to anyone who works in or visits that area.
- Door signs for laboratories will be labeled with all hazards stored in the lab that are above threshold levels (see below).
- Shelves will be organized and labeled by hazard class or DDC.
- GHS pictogram labels will be placed on applicable secondary containers or secondary containment.
- Refrigerators will be labeled with appropriate hazards.
- Labels are required on experimental setups, pipes, and other containers that will contain chemicals for longer than one work shift, or will be left unattended.
Label Links, Downloads, and References:
Container, Cabinet, and Shelving Labels
Use the pictogram from the original container, unless the reagent was created or modified in a way that changes the hazard of the chemical. For information about each of the pictograms, see OSHA's quick reference guide.
Pre-printed labels for purchase:
Download blank labels to print:
- Blank Address Label-Sized GHS Labels (very small containers)
- Blank 10/sheet Sized GHS Labels with Contents
- Blank 2/sheet Fridge Contents Label
- Blank 2/sheet Storage Cabinet Contents Label
Design your own labels:
For any questions or issues regarding container labeling, contact the EHSO.
Door Labeling Requirements
- Label the outside of laboratory doors so that emergency responders, facilities staff, and visitors are provided with information regarding the laboratory hazards and 24- hour contact information.
- All laboratories, support rooms and laboratory storage areas containing hazardous materials, hazardous equipment or other hazards shall be posted with standard hazard warning signage.
- It is recognized that minimum levels of hazardous materials do not represent a hazard to first responders. Therefore thresholds for concentration, activity and volume have been set for each category (see table below).
|Corrosive Liquids (pH < 3.5 or > 10.5)||4 L|
|Flammable Liquids||4 L|
|Flammable Solids||any amount|
|Flammable Gases||any amount|
|Oxidizers (liquid/solid)||4 L/ 1 kg|
|Organic Peroxides||1 kg|
|Water-reactive Chemicals||any amount|
|Pyrophoric (air-reactive) Chemicals||any amount|
|Radioactive Materials||any amount|
|Biosafety Level 1-2 Materials||any amount|
|Self-Reactive, Shock-, or Heat-sensitive Materials||any amount|
|Carcinogenic or Mutagenic Agents||100 g|
|Highly Toxic Materials||100 g|
|Gases Under Pressure (excluding aerosol cans)||any amount|
|Lasers (excluding completely enclosed and consumer)||Any class IIIb and IV laser|