<P> It is usually supplied as its dark 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 . </P> <P> Allura Red AC is a popular dye throughout the world . Annual production in 1980 was greater than 2.3 million kilograms . </P> <P> The European Union approves Allura Red AC as a food colorant, but EU countries' local laws banning food colorants are preserved . In the United States, Allura Red AC is approved by the FDA for use in cosmetics, drugs, and food . When prepared as a lake it is disclosed as Red 40 Lake or Red 40 Aluminum Lake . It is used in some tattoo inks and is used in many products, such as soft drinks, children's medications, and cotton candy . It is by far the most commonly used red dye in the United States, completely replacing amaranth (Red 2) and also replacing erythrosine (Red 3) in most applications due to the potential health effects of the two dyes . </P> <P> Allura Red has been heavily studied by food safety groups in North America and Europe, but remains in wide use and wide acceptance . </P>

What's the difference between red 40 and red 40 lake
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