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:
“The Lightning showed a Yellow Beak
And then a livid Claw.”
—Emily Dickinson (1830–1886)
“It is an agreeable change to cross a lake, after you have been shut up in the woods, not only on account of the greater expanse of water, but also of sky. It is one of the surprises which Nature has in store for the traveler in the forest. To look down, in this case, over eighteen miles of water, was liberating and civilizing even.”
—Henry David Thoreau (1817–1862)