Believe it or not the correct vial stopper is needed for your current lab project.Don't skimp on type which can effect sterility and resealing after a needle draw.
Lyophilization stoppers, are typically denser, and longer to allow for needle extraction even if the vial solution is freeze dried or stored in cool temperatures, the additional surface area of the pronged legs helps grip the glass and doesn't allow for easy dislodging (an added security measure for keeping your samples sterile as well).
What about the material? Butyl has long been regarded as a general use material, excellent for withstanding general acidic chemicals, preserving sterility, autoclavable, and multi-use injection draws. It's drawbacks however, can be long term storage, not resistant to all acidic chemicals, it is not humidity resistant, repeated exposure to heat can change and warp its appearance.
However Silica Gel made stoppers, have some added strengths, silica is a dessicant meaning that it can withstand longterm exposure to humidty, water, preventing the growth of algae or bacteria on its exterior in long term storage. It is inherently more chemical and acidic resistant allowing a wider range of storage solutions. Equally usable for injectables as butyl, with broader range of uses due to its dessicant and chemical properties.
Lyophilization stoppers, are typically denser, and longer to allow for needle extraction even if the vial solution is freeze dried or stored in cool temperatures, the additional surface area of the pronged legs helps grip the glass and doesn't allow for easy dislodging (an added security measure for keeping your samples sterile as well).
What about the material? Butyl has long been regarded as a general use material, excellent for withstanding general acidic chemicals, preserving sterility, autoclavable, and multi-use injection draws. It's drawbacks however, can be long term storage, not resistant to all acidic chemicals, it is not humidity resistant, repeated exposure to heat can change and warp its appearance.
However Silica Gel made stoppers, have some added strengths, silica is a dessicant meaning that it can withstand longterm exposure to humidty, water, preventing the growth of algae or bacteria on its exterior in long term storage. It is inherently more chemical and acidic resistant allowing a wider range of storage solutions. Equally usable for injectables as butyl, with broader range of uses due to its dessicant and chemical properties.
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