1.07735

Gel de sílice

beads, desiccant ~ 2 - 5 mm

• Número de CAS: 112926-00-8
• Número MDL: MFCD00011232
• Código UNSPSC: 41123003
• Número índice de la CE: 231-545-4
• NACRES: NB.21

Propiedades

• Nivel de calidad: 200
• formulario: beads
• potencia: >5000 mg/kg LD₅₀, skin (Rabbit)
• superficie: 700 m²/g
• pérdida: ≤2% loss on drying, 180°C
• tamaño de partícula: 2-5 mm
• tamaño de poro: 2.0-2.5 nm
• pH: 5-8 (20 °C, 100 g/L in H₂O, slurry)
• bp: 2230 °C
• mp: >1600 °C
• densidad aparente: 750‑800 kg/m³
• temp. de almacenamiento: no temp limit
• cadena SMILES: O=[Si]=O
• InChI: 1S/O2Si/c1-3-2
• Clave InChI: VYPSYNLAJGMNEJ-UHFFFAOYSA-N

Descripción

Aplicación

• Chromatographic Applications: Silica gel is widely used as a stationary phase in chromatographic techniques for separating various chemical compounds. Innovations in silica gel modification, such as pentabromobenzyl group-modified silica gel, have enhanced the separation efficiency for metabolites like nicotinamide. This application is critical for pharmaceutical analysis and metabolomics studies, providing high precision and accuracy in quantifying biologically relevant molecules (Ozaki et al., Analytical Biochemistry, 2022).


• Environmental Pollutant Detection: Silica gel is employed in creating molecularly imprinted polymers (MIPs) that selectively recognize and bind environmental pollutants. A notable application involves embedding quantum dots in molecularly imprinted silica gel to detect aminoimidazo-azaarenes (AIAs) in food samples. This method offers high selectivity and sensitivity, making it a powerful tool for food safety and environmental monitoring (Qiao et al., Current Analytical Chemistry, 2021).


• Heavy Metal Removal from Water: Silica gel doped with specific reagents is used for the adsorption and removal of heavy metals from water samples. Recent research highlights the use of sol-gel silica doped with 3-(2-naphthoyl)-1,1-dibutylselenourea for the efficient removal of Pb(II) and Zn(II) from aqueous solutions. This application is essential for environmental remediation and ensuring water safety, showcasing the versatility and effectiveness of silica gel in addressing environmental pollutants (Mehmood et al., International Journal of Environmental Analytical Chemistry, 2022).

Nota de análisis

Bulk density: about 75
Loss on drying (180 °C): ≤ 2 %
Water absorption capacity (24 hrs.,80 % relative humidity): ≥ 27 %

Información de seguridad

• Código de clase de almacenamiento: 13 - Non Combustible Solids
• Clase de riesgo para el agua (WGK): nwg
• Punto de inflamabilidad (°F): Not applicable
• Punto de inflamabilidad (°C): Not applicable