Comparing E331 - Sodium citrates vs E337 - Potassium sodium tartrate
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Popular questions
What is e331 in food?
E331 is sodium citrates—the mono-, di-, and trisodium salts of citric acid—used mainly as acidity regulators/buffers, sequestrants, and emulsifying salts in foods like soft drinks and processed cheese.
How are sodium citrates used in molecular gastronomy?
They’re used to adjust and buffer pH, chelate calcium, and act as an emulsifying salt—commonly to make ultra-smooth, meltable cheese sauces and to tune acidity/calcium levels for techniques like spherification and stabilizing foams.
What are sodium citrates degradation byproducts?
Under normal food use they’re stable; with strong heating/combustion they decompose to carbon oxides (CO2/CO) and sodium oxides (and related inorganic residues).
Why does sodium citrates burn?
It isn’t flammable; any “burning” sensation typically comes from irritation of skin, eyes, or mouth at high concentrations due to its mildly alkaline, saline nature, and on heating it decomposes rather than sustaining a flame.
E337 sodium potassium tartrate is in what foods?
It’s used as a sequestrant and stabilizer in some beverages (e.g., soft drinks and juices), jams/jellies, sugar syrups and confectionery, and occasionally in processed fruits/vegetables or baking mixes; look for E337 on ingredient lists.
How to grow potassium sodium tartrate crystal?
Dissolve the salt in hot water to make a saturated solution, then let it cool or evaporate slowly to form crystals; larger crystals grow best from a clean seed crystal and in low humidity because Rochelle salt is deliquescent.
How to prepare potassium sodium tartrate?
It is produced by neutralizing tartaric acid with sodium and potassium bases (e.g., carbonates) and crystallizing the tetrahydrate (Rochelle salt). For food use, obtain food‑grade E337 rather than attempting home preparation.
How to prepare potassium sodium tartrate solution from sodium and potasium tartarate?
Simply dissolve sodium tartrate and potassium tartrate together in water to the desired concentration; in solution this is effectively potassium sodium tartrate, while isolating the true double salt requires crystallization from an equimolar mix.
How to prepare potassium sodium tartrate solution from sodium and potassium tartrate?
Dissolve appropriate amounts of sodium tartrate and potassium tartrate in water to reach your target strength; the mixed ions give a solution equivalent to potassium sodium tartrate, though the double salt forms only on crystallization.