Chemical Properties
3-Methyl-2,4-nonanedione imparts a hay-like, green note
Occurrence
Reported present in dried green and black teas as well as dried parsley and dried spinach, Chinese green tea
powder, Japanese green tea, boiled carp, soybean oil, black tea and achovy.
Uses
3-Methylnonane-2,4-dione is a compound that possesses a butter-like and beany off flavour that is a result of flavour reversion of soya-bean oil. 3-Methylnonane-2,4-dione is also present in Japanese green tea and pressure-cooked hen meat.
Definition
ChEBI: 3-Methyl-2,4-nonanedione is a beta-diketone.
Aroma threshold values
In air at 0.000007 to 0.000014 mg/m3. Aroma characteristics at 1.0%: sweet, waxy, creamy dairy, condensed milky and dried milk powder, slightly coconut and musty nuances, grape and haylike nuances.
Taste threshold values
Taste characteristics at 1 to 5 ppm: sweet, milky creamy, condensed milk and dried milk powder, slightly
fruity coconut, creamy and fruity notes reminiscent of banana, grape skin, green tea and aged cheeses, good mouthfeel
