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4-Mercapto-4-methyl-2-pentanone is one of the most strongly contributing odorants in the volatile fraction of a Japanese green tea (sen-cha) infusion, and on the basis of the results of an aroma extract dilution analysis. 4-mercapto-4-methyl-2-pentanone in the grapefruit/sulfury group was found in reconstituted concentrate after thermal concentration.
Kenji Kumazawa,; Kikue Kubota,; Hideki Masuda. Influence of Manufacturing Conditions and Crop Season on the Formation of 4-Mercapto-4-methyl-2-pentanone in Japanese Green Tea (Sen-cha) . J. Agric. Food Chem. 2005, 53 (13), 5390-5396.
Jianming Lin,; Russell L. Rouseff,; Sandy Barros,; Michael Naim. Aroma Composition Changes in Early Season Grapefruit Juice Produced from Thermal Concentration. J. Agric. Food Chem. 2002, 50 (4),813-819.
Hazard Statements: H226-H319-H335
Flammable liquid and vapour. Causes serious eye irritation. May cause respiratory irritation.
Precautionary Statements: P261-P305+P351+P338
Avoid breathing dust/fume/gas/mist/vapours/spray. IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.