ISO 8537:2016

Overview

ISO 8537:2016 specifies requirements and test methods for sterile single-use syringes, with or without needle, for insulin. It applies to empty, plastic syringes intended to be filled by the end user and used immediately for insulin injections in humans. The standard covers syringes for insulins of various concentrations and focuses on performance, safety and testing - while explicitly excluding glass syringes, syringes pre-filled by manufacturers, syringes for power-driven pumps, and syringes intended for long-term storage after filling.

Key Topics and Requirements

ISO 8537:2016 defines technical and quality expectations across design, materials, testing and labeling. Key topics include:

• Material selection and biocompatibility - guidance on plastic materials and reference to biological evaluation (e.g., ISO 10993-1).
• Sterility and packaging - unit packaging, self-contained sterile syringes, multiple-unit packs and user packaging requirements.
• Colour coding - identification schemes to reduce risk of dosing errors for different insulin concentrations.
• Dimensions and graduations - barrel, plunger, finger grips and graduated scales for accurate dosing.
• Plunger and stopper performance - fit, lubrication and forces required to operate the piston.
• Nozzle and Luer fitting - conical fittings and correct nozzle position for secure connections (referencing ISO 594-1).
• Needle tubing and needle integrity - bonding of hub and needle tube, and needle requirements (linked to ISO 7864 and ISO 9626).
• Performance tests - dead space, liquid and air leakage (at piston and hub/nozzle), aspiration/compression leakage tests, and extractables (acidity/alkalinity and metals).
• Information for users - mandatory labeling, markings for self-contained syringes and storage/transport instructions.
• Normative test methods - Annexes A–H provide specific test fluids and methods (e.g., pyrogenicity extracts, force testing, dead space).

Applications and Who Uses It

ISO 8537:2016 is used by:

• Medical device manufacturers designing and producing insulin syringes to meet international performance and safety requirements.
• Quality and regulatory teams evaluating compliance for market approval and conformity assessment.
• Test laboratories performing validation, acceptance and routine quality control testing.
• Procurement and clinical purchasing groups specifying syringes for hospitals, clinics and home use.
• Healthcare professionals and patient-safety teams concerned with correct device selection and prevention of dosing errors.

Related Standards

• ISO 594-1 (Luer taper fittings)
• ISO 7864 (sterile hypodermic needles)
• ISO 9626 (stainless steel needle tubing)
• ISO 10993-1 (biological evaluation)
• ISO 3696 (laboratory water)

ISO 8537:2016 helps ensure safe, accurate and compatible insulin delivery by defining clear performance criteria, standardized tests and labeling practices for sterile single-use insulin syringes.