Samples of Cl 2 gas, Br 2 liquid, and I 2 solid are displayed in round 1 L glass bulbs. Flourolube vacuum grease from Fisher is inert to the halogens. If any of them break harmful gas and vapors will be released.
Chlorine gas is a powerful, possibly lethal irritant.
Bromine vapors will cause severe irritation of respiratory tract and bromine liquid will corrode the skin. Solid iodine can be intensely irritating to skin, eyes, and mucous membranes.