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Diacetyl Elan Chemical Company Inc. Diacetyl (2,3 Butanedione; Dimethyldiketone; Dimethylglyoxal) FEMA 2370 is a yellow to yellow-green liquid. It has a molecular weight of 86.09 and it's molecular formula is C4H6O2. Diacetyl has a minimum purity amount of 95.0%. It's specific gravity is ...展開 Diacetyl (2,3 Butanedione; Dimethyldiketone; Dimethylglyoxal) FEMA 2370 is a yellow to yellow-green liquid. It has a molecular weight of 86.09 and it's molecular formula is C4H6O2. Diacetyl has a minimum purity amount of 95.0%. It's specific gravity is 0.979 - 0.985 and it's refractive index is 1.393 - 1.397. Diacetyl has a butty flavor and can be added to foods and beverages where a butter flavor is desired such as chocolates, cooking oils, and popcorn. 收起