Overview
ISO 11040-3:2025 - Prefilled syringes: Seals for dental local anaesthetic cartridges specifies the shape, dimensions, materials, performance requirements and labelling of single‑use seals (aluminium cap + elastomeric liner) used on dental local anaesthetic cartridges. The standard emphasizes the role of primary packaging in maintaining the potency, purity, stability and safety of medicinal products and aligns component production with good manufacturing practice (cGMP) principles.
Key topics and technical requirements
- Classification
- Type A: mono‑layer liner
- Type B: double‑layer liner (both layers continuous; layer thickness ratio agreed with customer)
- Shape & dimensions
- Standard nominal size example: 7.5 mm opening diameter.
- Typical cap/liner ranges (as specified): Type A cap height ~4.85–4.90 mm, liner thickness 1.3–1.5 mm; Type B cap height up to 5.3 mm, liner thickness 1.45–1.95 mm. Aluminium thickness to be agreed (example range 0.15–0.25 mm).
- Materials
- Aluminium cap: anodized, lacquered or suitably coated (see ISO 8872).
- Liner: elastomer or TPE formulation approved by the customer; manufacturer must ensure batch conformity.
- Liner must withstand two autoclave cycles at (121 ± 2) °C for 30 min (or be validated for other sterilization methods).
- Physical performance
- Hardness: ±5 IRHD from the agreed nominal value (tested per ISO 48‑4).
- Fragmentation: test per ISO 8871‑5:2025 using a 0.4 mm outer diameter needle (butt‑end needle geometry per ISO 7885).
- Freedom from leakage: assessed using the Annex A leakage test (water‑filled cartridges, 30 ± 1 N applied for 1 minute on a set of 10 cartridges).
- Ageing: seals must maintain performance over agreed shelf‑life; storage guidance per ISO 2230.
- Chemical & biological
- Chemical extractables per ISO 8871‑1; biological requirements and test methods per ISO 8871‑4. Biological hazard assessment may follow ISO 10993‑1 when relevant.
- Labelling & designation
- Designation format e.g. Seal ISO 11040-3 - A for type A seals.
Applications and users
This standard is intended for:
- Manufacturers of elastomeric seals, aluminium caps and prefilled dental cartridges
- Pharmaceutical pack producers and contract packagers producing dental local anaesthetic cartridges
- Quality, regulatory and validation engineers who perform incoming inspection, stability and compatibility testing
- Procurement and R&D teams specifying primary packaging for dental injectable products
Use cases include component design, supplier qualification, incoming acceptance testing, and regulatory documentation to demonstrate compliance for dental cartridge primary packaging.
Related standards
Keywords: ISO 11040-3, prefilled syringes, seals for dental local anaesthetic cartridges, dental cartridges, liner, aluminium cap, leakage test, elastomeric parts, sterilization, cGMP.
