381276

Silica

99.8%

• Synonym(s): Silica, fumed, Silica, Silicic anhydride, Silicon dioxide, Silicon dioxide amorphous
• Linear Formula: SiO₂
• CAS Number: 112945-52-5
• Molecular Weight: 60.08
• Número MDL: MFCD00011232
• ID de substância PubChem: 24863799
• NACRES: SB.52

Properties

• grau: standard
• Nível de qualidade: 100
• teor: 99.8%
• forma: powder
• technique(s): LPLC: suitable
• matriz: Silica
• Grupo ativo da matriz: silica
• tamanho de partícula: 0.011 μm
• tamanho de poro: 60 Å mean pore size
• área da superfície: 175-225 m²/g
• técnica de separação: hydrophilic interaction (HILIC)
• SMILES string: O=[Si]=O
• InChI: 1S/O2Si/c1-3-2
• InChI key: VYPSYNLAJGMNEJ-UHFFFAOYSA-N

Description

Descrição geral

Silica is a naturally occurring material in minerals, flint and in some plants in crystalline phase. Silica commonly used in industries is in synthetic form. Surface area, pore volume, pore size and particle size are independently controllable to some extent. The crystalline silica may be classified based on atmospheric pressure as:
a. Quartz: = 1143K
b. Tridymite: 1143 - 1743K
c. Cristobalite: = 1743, over 1973K it forms amorphous vitreous silica glass.

Aplicação

Silica was used in synthesis of silicalite. Silica was used to assist the catalytic growth of oxide and nitride nanowires.

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.

May contain adsorbed H₂O and CO₂ which is removable by calcining at >900°C

Safety Information

• Código de classe de armazenamento: 13 - Non 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)