SODIUM METAPHOSPHATE, INSOLUBLE
Prepared at the 46th JECFA (1996), published in FNP 52 Add 4 (1996). Metals and arsenic specifications revised at the 55th JECFA (2000). A group MTDI of 70 mg/kg bw, as phosphorus from all food sources, was established at the 26th JECFA (1982)
SYNONYMS Insoluble sodium polyphosphate; IMP; Maddrell's salt
DEFINITION A high molecular weight sodium polyphosphate composed of two long metaphosphate chains (NaPO3)
x that spiral in opposite directions about a common axis; the Na2O/P2O5 ratio is about 1.0; the pH of a 1 in 3 slurry in water is about 6.5.
Chemical names Sodium metaphosphate
C.A.S. number 50813-16-6
Assay Not less than 68.7% and not more than 70.0% of P2O5
DESCRIPTION White crystalline powder
FUNCTIONAL USESEmulsifier, sequestrant, texturizer
