Chemical container cap breakseal, chemical container cap thereof, and chemical container assembly thereof

An article comprising:

• a breakseal for a chemical container cap, the breakseal including:
• a base portion configured to be externally rupturable,
• an outer periphery portion extending outward from the base portion, the outer periphery portion curving away from a plane of the base portion as the outer periphery portion extends outwards, the outer periphery portion configured such that a circumference of the outer periphery portion is reducible so as to provide tension against an opening for a hole in a chemical container cap to thereby hold the breakseal in the opening with the base portion extending over the hole, and
• a first ring protruding from the body portion, the ring portion configured to form a radial seal with a port of a chemical container.

An assembly comprising:

• a chemical container including a port;
• a chemical container cap coupled to the chemical container over the port, the chemical container cap including:
• a cap body including a hole and an opening for the hole;
• and
• a breakseal disposed in the opening of the cap body and over the port, the breakseal including:
• a base portion extending over the hole, the base portion configured to rupture under an external force,
• an outer periphery portion extending outwards from the base portion, the outer periphery portion curving away from a plane of the base portion as the outer periphery portion extends outwards, and
• a first ring protruding from the body portion, the ring portion forming a radial seal with the port of the chemical container.