The M426 8-inch shell was a

chemical A chemical substance is a unique form of matter with constant chemical composition and characteristic properties. Chemical substances may take the form of a single element or chemical compounds. If two or more chemical substances can be combin ...

artillery shell A shell, in a modern military context, is a projectile whose payload contains an explosive, incendiary device, incendiary, or other chemical filling. Originally it was called a bombshell, but "shell" has come to be unambiguous in a military ...

designed for use by the U.S. Army. It was designed to be used with approximately of GB or

VX (nerve agent) VX is an extremely toxic chemical synthesis, synthetic chemical compound in the organophosphorus compound, organophosphorus class, specifically, a phosphonate, thiophosphonate. In the class of nerve agents, it was developed for military use i ...

References

Chemical weapon delivery systems Artillery shells Chemical weapons of the United States {{ammo-stub