硅酸钠

Description

Sodium silicate · CAS 1344-09-8 · Na2O3Si. UNII 052612U92L. Boiling Point: 102 °C @760 [mm Hg]; Melting Point: 1089 °C; Density: 2.614.

Identification

CAS Registry Number	1344-09-8
PubChem CID	23266
Molecular formula	Na2O3Si
IUPAC name	disodium;dioxido(oxo)silane
UNII (FDA)	052612U92L

Computed Descriptors

Molecular Weight	122.063
Hydrogen Bond Donor Count	0
Hydrogen Bond Acceptor Count	3
Rotatable Bond Count	0
Exact Mass	121.94120896
Monoisotopic Mass	121.94120896
Topological Polar Surface Area	63.2
Heavy Atom Count	6
Formal Charge	0
Complexity	18.8

Physical & Chemical Properties

Boiling Point	102 °C @760 [mm Hg]
Melting Point	1089 °C
Density	2.614
Density	1.1 to 1.7 @ 15°C
Vapor Pressure	18 [mm Hg]

Physical description & handling notes

• Sodium silicate appears as a powdered or flaked solid substance. Strong irritant to skin, eyes, and mucous membranes. May be toxic by ingestion. Concentrated aqueous solutions used as a glue.
• Large Crystals; Liquid; Liquid; Dry Powder; Liquid; Liquid; Other Solid; Large Crystals; CBI; Dry Powder; Other Solid; Wet Solid
• Liquid; Other Solid; Dry Powder; Liquid; Liquid; Dry Powder; Dry Powder; Gas Vapor; Liquid; CBI; Large Crystals
• Deliquescent powder or flakes; [CAMEO] Amorphous lumps, aqueous solution, or spray-dried powder with approximately 20% residual water; [Reference #1]
• White solid; [Hawley] Colorless to white hygroscopic solid; [ICSC] White odorless granules; [Alfa Aesar MSDS]
• COLOURLESS 25-50% SODIUM SILICATE SOLUTION IN WATER.

Regulatory Status

Regulatory & Food Contact

FDA Substance added to food: Use unspecified FDA Substance added to food: ANTICAKING AGENT OR FREE-FLOW AGENT, DRYING AGENT, HUMECTANT, PROCESSING AID FDA Inventory of Food Contact Substances Listed in 21 CFR: FCS CIR / INCI: Cosmetic ingredients (Sodium Metasilicate) -> CIR (Cosmetic Ingredient Review) CIR / INCI: Cosmetic ingredients (Sodium Silicate) -> CIR (Cosmetic Ingredient Review) CIR / INCI: Buffering; Anticorrosive; Chelating

GHS notification summary

7.2% (290 / 4043)

GHS Hazard Classification

GHS notification summary	7.2% (290 / 4043)
Reported hazard statements	H314, H335, H290 (13.9%), H302 (24.1%), H315 (72.6%), H318 (61.5%), H319 (28%), H371

Documented Uses

• CIR ingredient: Sodium Metasilicate
• CIR ingredient: Sodium Silicate
• Steel Producing [Category: Industry]
• Molding and Core Making [Category: Foundry]
• Petroleum Production and Refining [Category: Industry]
• Pulp and Paper Processing [Category: Industry]

Synonyms

SODIUM SILICATE; Waterglass; Sodium siliconate; Sodium sesquisilicate; Sodium silicate glass; Sodium water glass; Britesil; Carsil; Dryseq; Sikalon; Silican; Soluble glass; Silicic acid, sodium salt; Agrosil S; Agrosil LR; Portil A

Frequently Asked Questions

What are the CAS number and molecular formula of Sodium silicate?

CAS 1344-09-8; molecular formula Na2O3Si; molecular weight — g/mol.

What other names is Sodium silicate known by?

SODIUM SILICATE, Waterglass, Sodium siliconate, Sodium sesquisilicate, Sodium silicate glass, Sodium water glass.

What is the regulatory status of Sodium silicate?

Documented regulatory listings: FDA Substance added to food: Use unspecified; FDA Substance added to food: ANTICAKING AGENT OR FREE-FLOW AGENT, DRYING AGENT, HUMECTANT, PROCESSING AID; FDA Inventory of Food Contact Substances Listed in 21 CFR: FCS.

Is Sodium silicate classified as hazardous?

7.2% of GHS notifications report no hazard classification (290 of 4043).

What are the key physical properties of Sodium silicate?

Boiling Point: 102 °C @760 [mm Hg]; Melting Point: 1089 °C; Density: 2.614; Density: 1.1 to 1.7 @ 15°C.

Facts on this page are taken from PubChem (US National Library of Medicine) and Wikidata. Grade-specific data — assay, moisture, particle size, packaging, shelf life — is issued per batch on the COA and is not published here.