Sodium silicate

• CAS: 1344-09-8
• Catalog Number: ACM1344098
• Category: Other Products
• Molecular Weight: 122.06
• Molecular Formula: Na2O3Si
• Synonyms: 49fg;agrosillr;agrosils;asbond1001;britesil;britesilh20;britesilh24;carsil
• Boiling Point: 2355°C(lit.)
• Melting Point: 1410ºC(lit.)
• Density: 2.33 g/mL at 25ºC(lit.)
• Appearance: Colorless liquid as usually supplied (solution)
• Hazard Codes: Xi
• Hazard Statements: F,Xi,T,C
• HS Code: 2839191000
• LogP: -0.73720
• PSA: 63.19
• Refractive Index: 1.512 – 1.514
• RIDADR: UN 2922 8/PG 2
• Safety Description: 26-36/37-45-7/9-28-36/37/39-36-27
• Stability: Stable. Incompatible with acids, most metals, many organic materials.
• Storage Conditions: Store in a cool, dry location in a sealed container.
• WGK Germany: 2

Case Study

Microencapsulated Sodium Silicate as A Repair Additive for Cement Cracks

Giannaros P, et al. Smart Materials and Structures, 2016, 25(8), 084005.

Sodium silicate can react with calcium hydroxide in the hydrated cement slurry to form a calcium silicate hydrate gel that fills cracks. Strategies for autonomous self-healing of cementitious composites using embedded microcapsules have been proposed. As cracks propagate in the cement matrix, they rupture the dispersed capsules and release their contents (such as sodium silicate) into the crack volume. Studies have shown that the addition of 4% microencapsulated sodium silicate reduced the sorption of cracked specimens over a 28-day healing period.
Ingredients of sodium silicate microcapsules
· L500 microcapsules contain a liquid sodium silicate solution dispersed in mineral oil and emulsifiers. The amount of sodium silicate is approximately 42% of the total encapsulating material. L500 microcapsules are dispersed in a liquid solution and need to be extracted before being added to the cement mixture.
· T130 microcapsules use polyurea as the shell material and are manufactured using in-situ polymerization technology. T130 microcapsules are in powder form so they can be added directly to the cement mixture.

Custom Q&A

What is the molecular formula of sodium silicate?

The molecular formula of sodium silicate is Na2SiO3.

What are some synonyms for sodium silicate?

Some synonyms for sodium silicate are Sodium metasilicate, Waterglass, and Sodium siliconate.

How is sodium silicate described in terms of its physical appearance and properties?

Sodium silicate appears as a powdered or flaked solid substance. It is a strong irritant to skin, eyes, and mucous membranes and may be toxic by ingestion. Concentrated aqueous solutions of sodium silicate are used as a glue.

What is the molecular weight of sodium silicate?

The molecular weight of sodium silicate is 122.063 g/mol.

What are the component compounds of sodium silicate?

The component compounds of sodium silicate are Sodium and Metasilicic acid.

What is the IUPAC name of sodium silicate?

The IUPAC name of sodium silicate is disodium;dioxido(oxo)silane.

What is the InChIKey of sodium silicate?

The InChIKey of sodium silicate is NTHWMYGWWRZVTN-UHFFFAOYSA-N.

What are some related CAS numbers to sodium silicate?

Some related CAS numbers to sodium silicate are 10213-79-3, 13472-30-5, and 13870-28-5.

What is the UNII number of sodium silicate?

The UNII number of sodium silicate is 052612U92L.

What is the molecular weight of sodium silicate according to PubChem?

The molecular weight of sodium silicate computed by PubChem is 122.063 g/mol.