Due to the wide variety of analyte and matrix combinations available, many CRMs fall into at least one hazard group, classing them as 'Dangerous Goods' meaning they must be handled, packed and shipped in specific ways.

Cyanide is a complex chemical that exists in various states throughout nature, encompassing a wide range of substances containing carbon-nitrogen bonds. 

It has been made infamous by crime novels and war movies as a rapid and deadly poison.