Silicic acid (H2SiO3), disodium salt, pentahydrate

CAS 10213-79-3

U.S. production volumes are classified as confidential business information.

Molecular structure of 10213-79-3 — 5 H₂O · 2 Na⁺

US productionCBI

Confidential Business Information. The EPA withholds this volume because publishing it could reveal the reporting company's trade secrets.

Top sourceNo public record

At least one company claimed its 2023 production or import volume for this chemical as confidential, so EPA withholds it.

Why supply is unknown

Production is reported production, not a complete census of factories. US production volume is confidential. Production reporting year: 2023.

Where It Comes From

EPA reports by year

2023: US production Confidential · Imports Confidential
2019: US production Zero · Imports 33.0K lb

Domestic parents -- activity not disclosed (4)

EPA records name a US company for this chemical but do not disclose whether the company made it here or imported it.

Access Chemicals & Services

Catalynt Solutions

Polyventive

Wilbur-Ellis Holdings Ii

EPA-registered importers (4)

Companies that report making or importing this chemical to the EPA. Registration is US-centric and does not indicate import origin.

Global Chemical Resources

Solenis

Univar Solutions Usa

Wego Chemical Group

Why It Matters

Sectors

FoodConstructionCore Chemicals

Downstream UsesNot recorded

FDA Shortage Status

Whether any manufacturer currently reports this drug as in shortage on the FDA Drug Shortages database. "Active Shortage" means at least one presentation has status "current."

No FDA shortage records

Industrial Uses

Used in 2 sectors as 2 functional roles.

•Emulsifier in Food, beverage, and tobacco product manufacturing (100%)Use—non-incorporative activities
•Sealant (barrier) in Adhesive ManufacturingProcessing—incorporation into formulation, mixture, or reaction product

Vendor Pricing

$0.03/gAngene Chemical

CountryChina (registered: Hong Kong)

Pack$14.00 / 500 g

Purity95%

Vendors11 available

Prices reflect listed pack sizes. Small research packs run far above bulk rates.

10 more vendors

Vendor	Country	$/g	Pack	Purity
A2B Chem LLC	United States	$0.06	500 g	95%
Sigma-Aldrich (Rush Stock)	Germany	$0.06	1 kg	95%
Sigma-Aldrich	Germany	$0.06	1 kg	95%
Fluorochem UK	United Kingdom	$0.07	1 kg	95%
AA BLOCKS	United States	$0.07	500 g	95%
AK Scientific, Inc.	United States	$0.08	1 kg	95%
Fluorochem EU	Germany	$0.08	100 g	95%
Combi-Blocks, Inc.	United States	$0.25	1 kg	95%
Angene International Limited	United States	$2.52	25 g	95%
Angene	China → Hong Kong	$4266.67	30 mg	95%

Chemical Identity

CAS10213-79-3

PubChem CID61495

DTXSIDDTXSID0029717

FormulaH10Na2O8Si

Mol. Weight212.14 g/mol

SMILESO.O.O.O.O.[O-][Si](=O)[O-].[Na+].[Na+]

Data Sources

EPA CompTox (DSSTox) · DTXSID0029717Retrieved 2026-04-06
PubChem · compound 61495Retrieved 2026-04-06
EPA Chemical Data ReportingReporting year: 2023 · Retrieved 2026-10-04
EPA Chemical Data ReportingReporting year: 2023 · Retrieved 2026-10-04

← Back to Dashboard ← Back to Food

Brief citations

Silicic acid (H2SiO3), disodium salt, pentahydrate (CAS 10213-79-3) https://chemicalindependence.com/chemical/10213-79-3/ EPA CompTox (DSSTox): DTXSID0029717. Retrieved 2026-04-06. https://comptox.epa.gov/dashboard/chemical/details/DTXSID0029717 PubChem: 61495. Retrieved 2026-04-06. https://pubchem.ncbi.nlm.nih.gov/compound/61495 EPA Chemical Data Reporting: 10213-79-3. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting EPA Chemical Data Reporting: CAS 10213-79-3. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting