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Para-Cresidine

Chemical compound From Wikipedia, the free encyclopedia

Para-Cresidine
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para-Cresidine is an organic compound with the formula CH3OC6H3(CH3)NH2. It is a white solid that is soluble in organic solvents. The compound features both amine and methoxy functional groups. It is used as an intermediate in preparation of dyes and pigments.

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Synthesis and reactions

The compound is obtained in several steps from 4-chlorotoluene. Nitration gives mainly 3-nitro-4-chlorotoluene, which reacts with methoxide sources to give 4-methoxy-2-nitrotoluene. Reduction of this nitro compound affords the aniline.[1]

Sulfonation with oleum gives 4-amino-5-methoxy-2-methylbenzenesulfonic acid. This sulfonic acid is a precursor to allura red AC, a red food coloring.[1]

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Allura Red AC is a popular food coloring agent made from para-cresidine.
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References

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