Calcium Silicate
AKA: Calcarea silicata, Huberderm 1000, INS NO.552, E-552, Head Cold, Calcium salt of silicic acid
Synthetic
Clean
The Expert Panel for Cosmetic Ingredient Safety concluded that the following 24 silicate ingredients are safe in cosmetics in the present practices of use and concentration described in this safety assessment when formulated to be non-irritating, with the exception that the available data are insufficient to make a determination of safety for the use of naturally-sourced (i.e., mined) silicate ingredients in products that may be incidentally inhaled: Calcium Silicate.
Solubility Insoluble in water
Formula
CaH6O8Si2
Mol. Weight
230.29
CAS #
1344-95-2
Form
Powder
State
Dry Powder; Liquid, Other Solid; Other Solid
Functions
Absorbent
Bulking
Opacifying
Pearlescent
Viscosity Controlling
Absorbs Excess Oil
Adds Body & Volume
Adds Opacity
Locks In Moisture
Brightens Skin
UV Protection
Traditional Use
Used historically as an absorbent in traditional medicine and as a thickening agent in modern cosmetics and personal care products.
Skin Types
●all-skin-types, gentle
Best For
General
Pregnancy & Breastfeeding Safe
Yes
The paper trail
🔬Peer-reviewed1 paper →
⚖️Regulatory1 listing →
🛡️Safety-assessed2 reviews →
Counts, not a verdict. A listing isn't a study. The trail, you decide.
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Verified Jun 2026
Data: PubChem · CosIng · EWG · CIR