CALCIUM SILICATE
Prepared at the 17th JECFA (1973), published in FNP 4 (1978) and in FNP 52 (1992). Metals and arsenic specifications revised at the 57th JECFA (2001). An ADI ‘not specified’ for silicon dioxide and certain silicates was established at the 29th JECFA (1985).
SYNONYMS INS No. 552
DEFINITION A synthetic hydrous calcium silicate or polysilicate prepared by a various reactions between siliceous material (e.g. diatomaceous earth) and natural calcium compounds (e.g. lime with varying proportions of other elements, such as magnesium, etc). The article of commerce may be further specified as to calcium and silicon dioxide contents, loss on drying, loss on ignition, pH of a 10% water slurry, bulk density, moisture, sulfate and chloride.
Chemical names Calcium silicate
C.A.S. number 1344-95-2
DESCRIPTION A very fine, white or off-white powder with low bulk density and high physical water absorption
FUNCTIONAL USES Anticaking agent
