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Acid orange 20 (also Orange I) is an
In the early 1950s, after several cases were reported of sickness in children who had eaten
organic compound
In chemistry, organic compounds are generally any chemical compounds that contain carbon-hydrogen or carbon-carbon bonds. Due to carbon's ability to catenate (form chains with other carbon atoms), millions of organic compounds are known. The ...
and an azo dye
Azo dyes are organic compounds bearing the functional group R−N=N−R′, in which R and R′ are usually aryl and substituted aryl groups. They are a commercially important family of azo compounds, i.e. compounds containing the C-N=N ...
. It is one of the first water soluble dyes to be commercialized, and one of seven original food dyes allowed under the U.S. Pure Food and Drug Act
The Pure Food and Drug Act of 1906, also known as Dr. Wiley's Law, was the first of a series of significant consumer protection laws which was enacted by Congress in the 20th century and led to the creation of the Food and Drug Administration. ...
of June 30, 1906. It is analyzed by HPLC
High-performance liquid chromatography (HPLC), formerly referred to as high-pressure liquid chromatography, is a technique in analytical chemistry used to separate, identify, and quantify each component in a mixture. It relies on pumps to pa ...
.
Use and discontinuation
At one time it was a popular food colorant but it was delisted in 1959 in the U.S.
In the early 1950s, after several cases were reported of sickness in children who had eaten Halloween
Halloween or Hallowe'en (less commonly known as Allhalloween, All Hallows' Eve, or All Saints' Eve) is a celebration observed in many countries on 31 October, the eve of the Western Christian feast of All Saints' Day. It begins the observanc ...
candy colored with the dye, the FDA conducted new, more thorough and rigorous testing on food dyes. Orange 1 was outlawed for food use in 1956.
Related compounds
*Orange II (Acid Orange 7
Acid Orange 7, also known as 2-naphthol orange is an azo dye. It is used for dyeing wool. It is produced by azo coupling
In organic chemistry, an azo coupling is an organic reaction between a diazonium compound () and another aromatic compound ...
), an isomer
References
{{Reflist Food colorings Azo dyes Acid dyes