Break-Neck Injection Ampoules

An ampoule is sealed by melting its glass neck closed, so the drug inside is protected by glass alone, with no stopper, liner or thread that could leak or interact with the product. For single-dose injectables this offers a very high level of container integrity, which is why ampoules remain a standard format for emergency drugs, vaccines and sensitive parenterals.

Modern ampoules open without a file: a one-point-cut score or a color-break ring weakens the neck so it snaps cleanly at a defined point when bent by hand.

Ampoules carry single-dose injectables, emergency and anesthetic drugs, vaccines and biologics, diagnostic and contrast agents, vitamin and mineral injections, sterile water for injection and veterinary injectables. Hospitals, ambulance services and clinics value the format because each ampoule is a self-contained, tamper-evident dose. The 1–2 ml sizes are the most common; 5–25 ml serves larger doses, diluents and contrast media. Amber ampoules protect light-sensitive drugs such as vitamins and some anesthetics.

The ampoule has a cylindrical body, a constricted neck with the opening feature, and a stem that is sealed after filling. A one-point-cut puts a small score at the break point, marked with a dot; a color-break ring applies a ceramic band that weakens the glass around the neck. Additional color-code rings identify the drug or strength. We supply open-funnel ampoules for conventional filling and closed-tip ampoules that are opened on the filling line.

Ampoules are filled aseptically, often under nitrogen for oxygen-sensitive drugs, then flame-sealed by tip or pull sealing. Seal integrity is checked on every unit for parenteral products. At the point of use, the neck is snapped at the marked point; clinical practice is to protect the fingers and, where indicated, draw the drug through a filter needle. Tell us your fill volume, filling machine and opening preference and we’ll supply drawings and samples for trials.

We convert Type I borosilicate tubing on rotary machines that form the body, neck and stem, then apply the OPC score or color-break ring and anneal. Dimensions, break force and cosmetic defects are inspected per lot, and certificates of analysis, break-force data and compliance documentation are available on request. Custom color-code rings, printed product identification and amber glass are available, and we pack ampoules in molded trays to protect the stems in transit.