Sodium silicate

Base Information

• Chemical Name: Sodium silicate
• CAS No.: 1344-09-8
• Molecular Formula: Na2SiO3
• Molecular Weight: 184.04
• Hs Code.: 2839.19
• Mol file: 1344-09-8.mol

Synonyms:Silicate G;Silicate GD;Stabisol 300/12;Star;Supercerac;TEX-SIL BP 42;VR-T;Vitrosol No 40;Water glass;Water glass 3;ZhS 3(silicate);Britesil H 24;Britesil H 265 LC;Carsil;Carsil 2000;Chemsilate;Crystal 0100S;Crystal 100N;Crystal 52;Crystal 96;DAB VI;DP 222;Dryseq;Expantrol 2;FLC 1L;Flochek A;GM 10;HK 30;HK 30 (silicate);Ineos 079;Inosil Na 4237;J Sodium Silicate No. 3;Kremnezol KZ-TM;L2 (silicate);L 96;Mejorsil;N 38;N 38 (silicate);N55;N 55 (silicate);Nasil 38/40;P 3 Saxin 5502;PQ N Clear;Portil A;Portil K;Pyramid 1;Pyramid P 40;Pyramid P 70;RA 430;RU Silicate;SB 41 (silicate);SCS 1 (silicate);SP 90 (silicate);Active Poly Sodium Metasilicate;

Chemical Property of Sodium silicate

Chemical Property:

• Appearance/Colour: colourless liquid as usually supplied (solution)
• Melting Point: 1410 °C(lit.)
• Boiling Point: 2355 °C(lit.)
• PSA: 63.19000
• Density: 2.33 g/mL at 25 °C(lit.)
• LogP: -0.73720
• Storage Temp.: -20°C
• Solubility.: H2O: soluble
• Water Solubility.: very slightly soluble cold H2O [MER06]

Purity/Quality:

99% ^*data from raw suppliers

STAR ^*data from reagent suppliers

Safty Information:

• Pictogram(s): Xi
• Hazard Codes: F,Xi,T,C
• Statements: 11-36/38-34-23/24/25-36/37/38-35-20/21/22-37
• Safety Statements: 26-36/37-45-7/9-28-36/37/39-36-27

MSDS Files:

SDS file from LookChem

Total 1 MSDS from other Authors

Useful:

• Formation and Properties: Sodium silicate (Na2SiO3) undergoes neutralization under certain chemical conditions to form silicic acid (H2SiO3), which polymerizes into silica gel through Si-O-Si covalent bonds. The pH value of liquid sodium silicate with a high silica modulus (SiO2/Na2O) is above 11, stabilizing the solution and lowering the condensation rate. Decreasing the alkalinity of sodium silicate to pH values less than 11 leads to the deposition of polymer-like silica gel.
• Uses: Sodium silicate finds various applications, including geopolymers, alkali activators, cementitious materials, and accelerators in cementitious systems. In geopolymers, sodium silicate initiates the formation of oligomers followed by the condensation of metal-oxygen bonds to construct a rigid three-dimensional network. As an alkali activator, sodium silicate provides Si ions to the pore solution and dissolves metal ions from pozzolanic materials to form cementing gels. It also accelerates the hydration of Portland cement through the pozzolanic reaction.
• Use with Blast Furnace Slag (BFS): Sodium silicates exhibit promising properties when used with Blast Furnace Slag (BFS) as a precursor in cementitious materials. Although synthetic sodium silicates are relatively expensive and environmentally impactful compared to other activators, they are still considered in applications requiring high strength.
• Accelerator in Cementitious Materials: Sodium silicate is widely used as an accelerator in cementitious materials to augment the rate of early age strength and abbreviate the setting time. It is commonly used in sprayed concrete applications to achieve high early strengths and eliminate rebound problems. Sodium silicate is also used as an activator in alternative binders, such as refill, which is made by adding a small amount of sodium silicate to water, cement, and mineral additives like slag. The addition of sodium silicate reduces the water-to-cement ratio, resulting in higher strength and reduced void ratio.