S5505

Silica, fumed

powder, 0.2-0.3 μm avg. part. size (aggregate)

• Sinônimo(s): Silica, Silicon dioxide, Silicic anhydride, Silicon dioxide amorphous
• Fórmula linear: SiO₂
• Número CAS: 112945-52-5
• Peso molecular: 60.08
• Número MDL: MFCD00011232
• ID de substância PubChem: 24899656
• NACRES: NA.22

Propriedades

• forma: powder
• Nível de qualidade: 200
• índice de refração: n20/D 1.46 (lit.)
• Tamanho médio da partícula: 0.2-0.3 μm (aggregate)
• área da superfície: 200 m²/g±25 m²/g
• densidade: 2.3 lb/cu.ft at 25 °C (bulk density)(lit.)
• SMILES string: O=[Si]=O
• InChI: 1S/O2Si/c1-3-2
• InChI key: VYPSYNLAJGMNEJ-UHFFFAOYSA-N

Descrição

Aplicação

Fumed Silica (SiO₂) has been used as a precursor to synthesize:

• Chlorosilanes via silanization, which are used to prepare silica/polydimethylsiloxane membranes to study permeation performance.
• Silicon carbide (SiC) nanoparticles by sol-gel method.
• Calcium silicate hydrate (C-S-H) by treating with CaO and water via hydrothermal reaction.
• Si/PtO₂ catalyst for the selective conversion of cinnamaldehyde to cinnamic acid by aerobic oxidation.

It can be also used in the preparation of:

• Silica sulfuric acid catalyst used in the synthesis of 3,4-dihydropyrimidin-2(1H)-ones via one-pot three-component Biginelli reaction.
• HClO₄-SiO₂ heterogeneous catalyst used in the synthesis of tetrasubstituted imidazoles.

Embalagem

500 g in poly drum

100 g in poly bottle

Características e benefícios

Has interesting thickening and thixotropic properties, and an enormous external surface area.

Outras notas

Particle sizes are for primary particles, which form branched, chain-like aggregates a few tenths of a micron long.

Informações de segurança

• Código de classe de armazenamento: 11 - Combustible Solids
• WGK: WGK 2
• Ponto de fulgor (ºF): Not applicable
• Ponto de fulgor (ºC): Not applicable
• Equipamento de proteção individual: Eyeshields, Gloves, type N95 (US)