It is possible you meant GDP deflator code 439 (used in some legacy ERP systems to adjust nominal GDP to real prices). Check your original source document for a missing colon or space.
Among the hundreds of E-numbers, —chemically known as Sodium Sulphosuccinate (specifically Sodium diethyl sulphosuccinate )—occupies a unique niche. It is not a sweetener like Aspartame, nor a preservative like Sodium Benzoate. It is, fundamentally, a chemical workhorse: an emulsifier and a wetting agent. But what does that actually mean for the food on your plate? gdp e439