Sodium metasilicate

CAS 6834-92-0

Sodium metasilicate is a strongly alkaline processing aid, used to peel fruit and vegetables chemically and to clean processing equipment. It is not an ingredient of the finished food.

Where it is and isn’t permitted

Status of Sodium metasilicate by jurisdiction. Every jurisdiction this site covers is listed, including those where the substance does not appear.
JurisdictionStatusScope and limitsCitation
United StatesFood and Drug AdministrationPermitted21 CFR 184.1769aretrieved 2026-09-07
Codex AlimentariusCodex Alimentarius Commission / JECFANot listedDoes not appear on this jurisdiction’s permitted list. That is not the same as being prohibited.

What it is made from

Produced by fusing sand with sodium carbonate.

  • Vegan
  • Vegetarian
CAS registry number
6834-92-0
InChIKey
NTHWMYGWWRZVTN-UHFFFAOYSA-N
PubChem
CID 23266

Every name it appears under

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

CAS registry number

  • 1344-09-8
  • 6834-92-0
  • 84992-49-4

As it appears in regulation

  • Sodium metasilicate

Other names

  • Agrosil LR
  • Agrosil S
  • as Bond 1001
  • Britesil
  • Britesil H 20
  • Britesil H 24
  • Carsil
  • Carsil (silicate)
  • Caswell No. 792
  • Crystamet
  • Disodium metasilicate
  • Disodium monosilicate
  • disodium oxosilanebis(olate)
  • disodium;dioxido(oxo)silane
  • Dryseq
  • Dupont 26
  • EPA Pesticide Chemical Code 072603
  • HSDB 753
  • IJF18F77L3
  • L 96 (salt)
  • Metso 20
  • Metso 99
  • Metso beads 2048
  • Metso beads, drymet
  • Metso pentabead 20
  • Orthosil
  • Portil A
  • Pyramid 1
  • Pyramid 8
  • Sikalon
  • Silica E
  • Silica K
  • Silica N
  • Silica R
  • Silican
  • Silicic acid (H2SiO3), disodium salt
  • Silicic acid (H2SiO3), disodium salt, pentahydrate (8CI,9CI)
  • Silicic acid (H2SiO3), sodium salt (1:2)
  • Silicic acid, disodium salt
  • Silicic acid, sodium salt
  • SILICON SODIUM OXIDE
  • Simet A
  • SODIUM BETA-SILICATE
  • Sodium metasilicate
  • Sodium metasilicate (Na2SiO3)
  • Sodium metasilicate, anhydrous
  • Sodium sesquisilicate
  • SODIUM SILICATE
  • Sodium silicate (Na2SiO3)
  • Sodium silicate glass
  • SODIUM SILICON OXIDE (NA2SIO3)
  • Sodium siliconate
  • Sodium water glass
  • Soluble glass
  • Star
  • Water glass
  • Waterglass

Systematic names

  • Disodium;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

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

Machine-readable:/api/v1/additives/sodium-metasilicate.json