Methyl yellow is a yellow colored chemical compound that is generally used as a pH indicator. The molecular formula of this compound is C14H15N3 and its chemical name is 4-Dimethylaminoazobenzene. At below pH 2.9, methyl yellow turns to red and at above pH 4.9 it remains yellow. It was used to used as food additive but after its toxicity was recognized methyl yellow was forbidden to use in food products.

As similar to Sudan Red recalls in 2005, methyl yellow recalls have occurred in Belgium, France, Luxembourg and Germany. According to Belgian food safety authority AFSCA/FAVV’s report, methyl yellow was detected in curry powders which was imported by Belgian company from India. After that result, the authority recalled all curry product such as curry pastes, curry based spice mix  include contaminated batches although the amount of the detected methyl yellow was below 15 ppb.

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