リン酸エステル・誘導体

食品・飲料におけるリン酸エステルおよびその誘導体は、多価金属イオンを捕捉して金属触媒による酸化やスケールを制御するフィチン酸系の金属封鎖剤（phytic acidとそのナトリウム塩）です。 Phytic acid is myo-inositol hexaphosphate: six phosphate groups on one ring give it a high affinity for iron, copper, and calcium across a wide pH range. Where trace iron or copper is driving color loss or rancidity, a phytate sequestrant locks up the metal at low addition levels.

The two forms differ in how they handle pH. Free phytic acid is strongly acidic and pulls system pH down, which suits low-pH beverages and dips but can clash with neutral formulas. Sodium phytate is the pH-neutral, more soluble salt u2014 easier to dose into neutral systems, at the cost of added sodium. Choose the free acid where mild acidity is acceptable; choose the sodium salt where pH must stay neutral and a small sodium contribution is tolerable.

Phytate sequestrants protect color and flavor in dressings, canned and cured foods, seafood, and beverages by removing the metal catalysts that start oxidation. They also help suppress metal-protein haze and scale in process water. Add the sequestrant early, before the metal can catalyze a reaction, and confirm compatibility with any mineral fortificants, since a sequestrant competes for the same calcium, iron, or zinc you are trying to declare on the label.

• 微量の鉄・銅を封鎖することによるドレッシング、マヨネーズ、缶詰食品の色と風味の保護
• 飲料および塩漬け・加工食品における酸化安定性
• 醸造およびプロセス水における金属－タンパク質由来の濁りとスケールの制御
• アスコルビン酸塩などの酸化防止系と併用する金属封鎖剤としての補助
• 遊離酸を使いたくない中性pHでの金属イオン制御（sodium phytate）

• Phytic acid u2014 PubChem
• Sodium phytate — PubChem