... 5 4.White crystal with acetic acid odor Sodium Diacetate Food AdditivesOther Name: Monosodium Diacetate Molecular Formula: C4H7NaO4.XH2O Abbreviation: ... is a free flowing, acidic sodium salt widely used as food flavoring, preservative, and pH buffer. The compound consists ... . These products include savory cookies, chips, sauces, ketchup, food coatings, and condiments. It also improves the shelf life of ...