Calcium silicate

INS 552CAS 10101-39-0

Used as an anticaking agent.

Calcium silicate is an anticaking agent, used in table salt, baking powder and powdered mixes. It absorbs many times its weight in moisture, which is how it keeps a powder flowing.

Where it is and isn’t permitted

Status of Calcium silicate by jurisdiction. Every jurisdiction this site covers is listed, including those where the substance does not appear.
JurisdictionStatusScope and limitsCitation
United StatesFood and Drug AdministrationPermitted, with conditions21 CFR 172.410and 1 further provisionretrieved 2026-09-07
Codex AlimentariusCodex Alimentarius Commission / JECFAPermitted, with conditions

8 food categories

highest permitted level 15,000 mg/kg

Show every food category
  • 01.5.1 Milk powder and cream powder (plain) — GMP
  • 01.6.1 Unripened cheese — GMP
  • 01.6.2.1 Ripened cheese, includes rind — GMP
  • 01.8.2 Dried whey and whey products, excluding whey cheeses — 10,000 mg/kg
  • 11.1.2 Powdered sugar, powdered dextrose — 15,000 mg/kg
  • 12.1.1 Salt — GMP
  • 12.1.2 Salt substitutes — GMP
  • 12.2.1 Herbs and spices — GMP
CXS 192-1995 Table Three, INS 552and 8 further provisionsretrieved 2026-09-07

What it is made from

Produced synthetically from lime and silica, or prepared from natural silicate minerals.

  • Vegan
  • Vegetarian
CAS registry number
10101-39-0
InChIKey
OYACROKNLOSFPA-UHFFFAOYSA-N
PubChem
CID 26370

Every name it appears under

65 recorded names. A label may use any of them.

INS number

  • 552

CAS registry number

  • 10101-39-0
  • 13983-17-0

As it appears in regulation

  • Calcium silicate

Other names

  • 1250 Wollastokup 10014
  • 1250 Wollastokup 10224
  • Aedelforsite
  • Baysical K
  • beta-Calcium silicate
  • Bistal
  • Bistal W
  • Cab-O-lite
  • Cab-O-lite 100
  • Cab-O-lite 130
  • Cab-O-lite 160
  • Cab-O-lite F 1
  • Cab-O-Lite P 4
  • Calcium metasilicate
  • Calcium monosilicate
  • Calcium silicate
  • calcium;dioxido(oxo)silane
  • Casiflux
  • Casiflux VP 413-004
  • CHC 62N10
  • CHC 74N
  • CHD 62N10
  • Dab-O-lite P 4
  • Fibernite HG
  • Florite
  • FPW 400
  • FPW 800
  • Fuwalip
  • FW 200 (mineral)
  • Gillebachite
  • Hycon A 60
  • Kemolit ASB
  • Kemolit ASB 8
  • Kemolit ASB 8 K
  • Kemolit asb-3
  • Kemolit-N
  • Nyad 10
  • Nyad 1250
  • Nyad 1250T
  • Nyad 325
  • Nyad Denacup 100G
  • Nyad G
  • Nyad G 400
  • Nyad G Wollastocoat 1001
  • Nyad G Wollastocoat 2075
  • Nycor 200
  • Nycor 300
  • Okenite
  • Rivaite
  • Schalstein
  • Silicic acid (H2SiO3), calcium salt (1:1)
  • Tabular spar
  • Tremin (mineral)
  • Vansil W 10
  • Vansil W 20
  • Vansil W 30
  • Vilnite
  • Wollastokup
  • WOLLASTONITE
  • Wollastonite (Ca(SiO3))

Systematic names

  • Calcium;dioxido(oxo)silane

Hazard reference values

No reference value for this substance in the sources we hold.

Evidence and how bodies read it

Studies, and the differing conclusions regulators drew from them, are curated by hand rather than machine-read, and none has been written for this substance yet.

Sources for this page

  • ecfr retrieved 2026-09-07
  • gsfa retrieved 2026-09-07

Full licence terms and publisher details on Sources. How this page is built and updated: Method.

Machine-readable:/api/v1/additives/calcium-silicate.json