Employees may not be required to work with a hazardous chemical from an unlabeled container except for a portable container intended for the immediate use of the employee who performs the transfer. Also, a label on an existing container of a hazardous chemical may not be removed or defaced. If the workplace has a chemical container with an inaccurate, damaged, or missing label, the container must be labeled as follows:
- Primary containers must be relabeled with at least the identity appearing on the MSDS/SDS, the pertinent physical and health hazards, including the organs that would be affected, and the manufacturer's name and address.
- Secondary containers must be relabeled with at least the identity appearing on the MSDS/SDS, and the appropriate hazard warnings.
Alternative labeling systems including NFPA fire diamonds or the HMIS labeling system are also accepted for THCA labeling requirements contingent upon employees being specifically trained on interpreting them.
For further information on the THCA labeling standard, please see the Hazardous Chemical Labels Fact Sheet (PDF, 229KB).