MarketMethional
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Methional

Methional is an organic compound with the formula CH3SCH2CH2CHO. It is a colorless liquid that is a degradation product of methionine. It is a notable flavor in potato-based snacks, namely potato chips, one of the most popular foods containing methional. Traces of the compound can also be found in black tea and green tea based products. Methional contains both aldehyde and thioether functional groups. It is readily soluble in alcohol solvents, including propylene glycol and dipropylene glycol.

Occurrence
In nature, methional is a thermally-induced volatile flavor compound. For instance, the heat-initiated Maillard reaction of reducing sugars and amino acids forms the initial basis of methional's composition. The formation of methional stems from the interaction of α-dicarbonyl compounds (intermediate products in the Maillard reaction) with methionine (Met) by the Strecker degradation reaction: :CH3SCH2CH2(NH2)CHCO2H → CH3SCH2CH2CHO + NH3 + CO2 == Preparation and reactions==
Preparation and reactions
Methional is synthesized commercially by the reaction of methanethiol and acrolein. :CH3SH + CH2=CHCHO → CH3SCH2CH2CHO Using the Strecker synthesis, methional is converted to methionine. For the purpose of animal feed supplements, enantiopure methionine is not required. Biological routes Because of their high cost, methional or its precursor methionine are not added during potato processing. :CH3S(CH2)2CH(NH2)CO2H + O → CH3S(CH2)2COCO2H + NH3 :CH3S(CH2)2COCO2H → CH3S(CH2)2CHO + CO2 ==References==
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