食品添加剂三聚磷酸钠（STPP）

White powder or fine granules, Na₅P₃O₁₀ ≥95.0%, P₂O₅ ≥57.0%, pH 9.4–10.0, whiteness ≥90, to GB25566-2010. A quality improver for canned food, juices, dairy and soymilk, tenderising ham and softening bean skins, also used as a thickener; 25 kg bags.