Overview
ISO 3925:2014 - Unsealed radioactive substances - Identification and documentation specifies requirements for labeling and documentation of commercially supplied unsealed radioactive substances intended for further physical or chemical handling. The standard excludes radiopharmaceuticals and standard sources. It promotes traceability, safe handling, and quality control by defining minimum identification marks on immediate containers and a comprehensive certificate of composition and activity.
Key topics and technical requirements
ISO 3925:2014 focuses on two main areas:
- Identification (labeling of immediate containers)
- Durable, legible marking with:
- Manufacturer’s name or symbol
- Radionuclide identification (chemical symbol and mass number) and, where physically possible, the chemical preparation name
- Radiation symbol in accordance with ISO 361 and, if space permits, the word “RADIOACTIVE”
- Cross-reference to the certificate
- Documentation (supplier’s certificate)
- Certificate must include, as appropriate: manufacturer name and address; preparation name and chemical form; radionuclide mass number and symbol; cross-reference to the container label; physical form and solvent; mass or volume; activity concentration and/or specific activity with stated date/time (and each radionuclide activity for mixtures); activity at a stated time/date; radionuclidic purity; radiochemical purity; chemical purity/impurities; pH (acidity/alkalinity); production and expiry dates; quantity and nature of any inactive materials; storage conditions; and nature of the immediate container.
- Normative references
- ISO 361 (basic ionizing radiation symbol) and ISO 921 (nuclear energy glossary) are cited as essential references.
Practical applications and intended users
ISO 3925:2014 is primarily used by:
- Suppliers and manufacturers of unsealed radioactive substances to ensure consistent labeling and to produce compliant certificates.
- Laboratories, research institutions, and industrial processing facilities that receive, handle, or chemically process unsealed radioactive materials and require accurate activity and purity information for planning and safety.
- Quality assurance, regulatory and compliance teams who need documented evidence of radionuclidic/radiochemical purity, activity concentrations, and storage requirements for audits and recordkeeping.
- Procurement and inventory managers who rely on standardized identification to track materials and maintain safe storage.
Practical benefits include improved traceability, better risk management for handling radioactive materials, streamlined regulatory compliance, and consistent supplier-to-user communication.
Related standards
- ISO 361 - Basic ionizing radiation symbol (labeling requirement referenced in ISO 3925)
- ISO 921 - Nuclear energy glossary (definitions used in the standard)
Keywords: ISO 3925, unsealed radioactive substances, identification, documentation, radionuclidic purity, radiochemical purity, activity concentration, supplier certificate.