CSA was recently asked about a universal symbol to denote cryogenic hazards. Our contacts at NIST have helped answer those inquiries. While OSHA (Occupational Safety and Health Administration) does not provide such a symbol, a cryogen “shipped” container would be labeled with the Gas Cylinder pictogram and a description of the cryogenic hazard. However, ISO 7010 provides this standard graphical symbol for use on safety signage internationally. The standard provides standardized shapes and colors for specific categories (prohibition, warning, evacuation routes, mandatory action and fire equipment); the yellow/black triangle is the standard format for warning symbols and the snowflake is used to indicate low temperature or freezing conditions. This symbol is used for signage.