ISO 361 Basic ionizing radiation symbol is an international standard that specifies the shape, proportions, application and restrictions on the use of the symbol.
It may be used to signify the actual or potential presence of ionizing radiation. It is not used for sound waves and other types of electromagnetic waves. The standard does not specify the radiation levels at which it is to be used.
This is a list of published International Organization for Standardization (ISO) standards and other deliverables. For a complete and up-to-date list of all the ISO standards, see the ISO catalogue.The standards are protected by copyright and most of them must be purchased. However, about 300 of the standards produced by ISO and IEC's Joint Technical Committee 1 (JTC1) have been made freely and publicly available.
ISO standards by standard number