Small glass vessels fabricated from USP Type I borosilicate glass, providing maximum solution stability and easy hermetic sealing. DWK ampules are offered in capacities ranging from 1 mL to 20 mL and in a variety of pack sizes.

• Converted from Type I borosilicate glass tubing, ampules conform to the hydrolytic resistance requirements outlined in USP and EP 3.2.1.
• Pre-scored constricted portion of the stem permits safe and easy opening while eliminating the need for filing
• Stems can be pull or tip-sealed
• Excellent dimensional stability for high speed filling and sealing operations

Methods of Sealing: For the tip-sealing method, while holding the ampule body, heat the tip in the flame approximately 3-4 mm from the top. Gently rotate the ampule while heating until the melted glass fuses into a smooth dome. The tip-sealing method is better suited for short stem ampules
To use the pull-sealing method, heat the center of the ampule stem in the flame. As the glass softens, rotate the ampule while pulling the top off. This method may be used to seal all ampule configurations.

Instructions for opening ampules: To open an ampule, grasp the stem in one hand and the body in the other, placing thumbs tip-to-tip near the constriction. Using thumb tips as a hinge, bend the stem and the body to break the ampule open. A special ampule file is not required.

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