A pharmaceutical rubber stopper is a medical device that can be used as a plug on a syringe or small injection container. It is typically made from butyl rubber and molded with a molding machine that is statically crosslinked with a wire. Its chemical and physical properties make it ideal for use in injection containers, due to its chemical purity and small capacity.
Pharmaceutical rubber stoppers can contain various materials to enhance the sealing properties. Some of these additives include sulfur, organic peroxides, and phenol resins. In addition, they can contain cross-linking aids and zinc oxide. Moreover, the surface of the pharmaceutical rubber stopper may be coated with another resin.
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