Para Red (paranitraniline red, Pigment Red 1, C.I. 12070) is a chemical dye. Chemically, the dye is similar to Sudan I. The dye was discovered in 1880 by von Gallois and Ullrich, and was the first azo dye. It dyes cellulose fabrics a brilliant red, but is not very fast. The dye can be washed away easily from cellulose fabrics if not dyed correctly. Throughout making Para Red, the solution will become acidic and basic. Small amounts of byproducts may be left over after the Para Red dye is made that may be acidic or basic, but if made correctly there are little of these and the byproducts have no effect.
Read more about Para Red: Synthesis, UK Food Alert
Famous quotes containing the word red:
“It was almost two years ago, while awaiting the imminent birth of my second child, that I decided to start working part-time. This would have been unthinkable to me when I was younger. At twenty-five I should have worn a big red A on my chest; it would have stood for ambition, an ambition so brazen and burning that it would have reduced Hester Prynne’s transgression to pale pink.”
—Anna Quindlen (20th century)