These are metallic elements that are soft, highly reactive, and typically found in pure or alloyed form; they are often shipped as slabs, rods, or powder. A key practical note for shippers is that their high reactivity requires inert packaging to prevent accidental ignition or corrosion.

Packaging should use corrosion‑resistant containers, and a certificate of purity is commonly requested by importers to verify compliance with safety standards. Proper labeling with the HSN code and hazard classification is mandatory for customs clearance.