Commission Directive 2008/84/EC of 27 August 2008 laying down specific purity criteria on food additives other than colours and sweeteners (Text with EEA relevance) (Codified version) (repealed) (c. 84)

ANNEX I

E 552 CALCIUM SILICATE

Definition	Calcium silicate is a hydrous or anhydrous silicate with varying proportions of CaO and SiO2
Chemical name	Calcium silicate
Einecs	215-710-8
Assay	Content on the anhydrous basis: as SiO2 not less than 50 % and not more than 95 % as CaO not less than 3 % and not more than 35 %
Description	White to off-white free-flowing powder that remains so after absorbing relatively large amounts of water or other liquids
Identification
A. Positive test for silicate and for calcium
B. Forms a gel with mineral acids
Purity
Loss on drying	Not more than 10 % (105 oC, 2h)
Loss on ignition	Not less than 5 % and not more than 14 % (1 000 oC, constant weight)
Sodium	Not more than 3 %
Fluoride	Not more than 50 mg/kg
Arsenic	Not more than 3 mg/kg
Lead	Not more than 5 mg/kg
Mercury	Not more than 1 mg/kg