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Red is the color at the end of the visible spectrum of light, next to orange and opposite violet. It has a dominant wavelength of approximately 625–740 nanometres. It is a primary color in the RGB color model and the CMYK color model, and is the complementary color of cyan.Reds range from the brilliant yellowtinged scarlet and vermillion to bluishred crimson, and vary in shade from the ...Allura Red AC is a red azo dye that goes by several names, including FDC Red 40. It is used as a food dye and has the E number E129.. It is usually supplied as its red sodium salt, but can also be used as the calcium and potassium salts. These salts are soluble in water.In solution, its maximum absorbance lies at about 504 nm. 921
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Tuesday, December 22, 2020