Manufactured packaging

• Follow the manufacturer's instructions if you are using manufactured packaging.
• Maintain copies of packaging instructions for at least one year.

Outer packaging that is used to ship Category A substances must meet manufacturing and performance specifications set by the United Nations. Packaging that meets these specifications are marked by a "UN" in a circle, a series of letters and numbers that indicate the type of package, class of goods the package is designed to carry, manufacturing date, authorizing agency, and the manufacturer. An example is shown below. This packaging is available from commercial sources with preprinted UN information. The strict, outer packaging regulations do not apply to Category B packages.

Reusing a container

If you will be reusing a container, remove all irrelevant labels and markings. Use durable labels of the proper size; letters and numbers must be at least 6 mm high. Affix hazard labels securely to one side of the package, adjacent to relevant markings. Do not overlap labels. A package can be re-used if there was no leakage during the previous transport.