No unlabeled substance should be present in the laboratory at any time!

Labeling Basics

• Use labels with good adhesive.
• Use a permanent marker (waterproof and fade resistant) or laser (not inkjet) printer. Print clearly and visibly.
• Replace damaged, faded or semi-attached labels.

Commercially Packaged Chemicals

Verify that the label contains the following information:

• Chemical name (as it appears on the MSDS)
• Name of chemical manufacturer
• Necessary handling and hazard information

Add:

• Date received
• Date first opened
• Expiration or "use by" date (if one is not present)

Secondary Containers and Prepared Solutions

When one transfers a material from the original manufacturer’s container to other vessels, these vessels are referred to as "secondary containers."

Label all containers used for storage with the following:

• Chemical name (as it appears on the MSDS)
• Name of the chemical manufacturer or person who prepared the solution
• Necessary handling and hazard information
• Concentration or purity
• Date prepared
• Expiration or "use by" date

Containers in Immediate Use

These chemicals are to be used within a work shift or laboratory session. Label all containers in immediate use with the following:

• Chemical name (as it appears on the MSDS)
• Necessary handling and hazard information

Chemical Waste

All containers used for chemical waste should be labeled with:

• "WASTE" or "HAZARDOUS WASTE"
• Chemical name (as it appears on the MSDS)
• Accumulation start date
• Hazard(s) associated with the chemical waste

Peroxide-Forming Substance

Peroxide-forming chemical must be labeled with:

• Date received
• Date first opened
• Date to be disposed of

NOTE: Some States also require (1) National Fire Protection Association (NFPA) code (refer to APPENDIX B) and/or (2) CAS number to be listed on the label. Consult the State regulations.