Yellow Cross (Gelbkreuz) is a World War I chemical warfare agent usually based on sulfur mustard (HS, Yperite, Lost).
The original Gelbkreuz was a composition of 80-90% of sulfur mustard and 10-20% of tetrachloromethane or chlorobenzene as a solvent which lowered its viscosity and acted as an antifreeze, or, alternatively, 80% sulfur mustard, 10% bis(chloromethyl) ether, and 10% tetrachloromethane. A later formulation, Gelbkreuz 1, was a mixture of 40% ethyldichloroarsine, 40% ethyldibromoarsine, and 20% of bis(chloromethyl) ether. In some cases nitrobenzene was used to mask the material's characteristic odor. French "ypérite no.20" was a similar mixture of 80% sulfur mustard and 20% tetrachloromethane.
Yellow Cross is also a generic World War I German marking for artillery shells with chemical payload affecting exposed surfaces of the body.
Famous quotes containing the words yellow and/or cross:
“down the sidewalk
where laborers feed their dirty
glistening torsos sandwiches
and Coca-Cola, with yellow helmets
on. They protect them from falling
bricks, I guess.”
—Frank O’Hara (1926–1966)
“Passion is here a soilure of the wits,
We’re told, and Love a cross for them to bear;
Joy shivers in the corner where she knits
And Conscience always has the rocking-chair,
Cheerful as when she tortured into fits
The first cat that was ever killed by Care.”
—Edwin Arlington Robinson (1869–1935)