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Merck

381276

Silica Inorganic Sorbent

120-140 mesh, 99.8%

Synonym(s):

Silica, fumed, Silica, Silicic anhydride, Silicon dioxide, Silicon dioxide amorphous

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About This Item

Linear Formula:
SiO2
CAS Number:
112945-52-5
Molecular Weight:
60.08
UNSPSC Code:
23201100
PubChem Substance ID:
24863799
NACRES:
SB.52
MDL number:
MFCD00011232

Key Documents

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Product Name

Silica, 99.8%

SMILES string

O=[Si]=O

InChI

1S/O2Si/c1-3-2

InChI key

VYPSYNLAJGMNEJ-UHFFFAOYSA-N

grade

standard

assay

99.8%

form

powder

technique(s)

LPLC: suitable

surface area

175-225 m2/g

matrix

Silica

matrix active group

silica

particle size

0.011 μm

pore size

60 Å mean pore size

separation technique

hydrophilic interaction (HILIC)

Quality Level

100

Related Categories

General description

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.

Application

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

Features and Benefits

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

Other Notes

May contain adsorbed H2O and CO2 which is removable by calcining at >900°C
Particle sizes are for primary particles, which form branched, chain-like aggregates a few tenths of a micron long.

Storage Class

13 - Non Combustible Solids

wgk

WGK 2

flash_point_f

Not applicable

flash_point_c

Not applicable

ppe

Eyeshields, Gloves, type N95 (US)

Regulatory Listings

Regulatory Listings are mainly provided for chemical products. Only limited information can be provided here for non-chemical products. No entry means none of the components are listed. It is the user’s obligation to ensure the safe and legal use of the product.

381276-BULK: + 381276-VAR: + 381276-500G:4548173939292 + 381276-100G:4548173939285

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Certificates of Analysis (COA)

Lot/Batch Number
MKCQ9164
MKCK7757
MKCH0255
MKCC9121
MKCB5325

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Mohadese Farhangian et al.
Industrial health, 59(6), 415-426 (2021-10-01)
The aim of the present study was to first fabricate an electrospun PVC nanofiber web and then assess its applicability in sampling and measuring the concentration of airborne crystalline silica by comparing analysis results with a commercial PVC membrane filter
Norma A Sánchez-Flores et al.
Journal of colloid and interface science, 323(2), 359-364 (2008-05-27)
Well crystallized silicalite-1 has been obtained from three sources of amorphous silica, namely, rice hull ashes, commercial Davisil, and a fume silica from Aldrich. The silicas were first dissolved in glycerol according to a recently described reaction. This reaction transforms
The Heat Capacities of Quartz, Cristobalite and Tridymite at Low Temperatures
Anderson, C. Travis.
Journal of the American Chemical Society, 58, 568-570 (1936)
Silica-assisted catalytic growth of oxide and nitride nanowires.
Tang, C. C., et al.
Chemical Physics Letters, 333, 12-15 (2001)
Srivalleesha Mallidi et al.
Nano letters, 9(8), 2825-2831 (2009-07-04)
Gold nanoparticles targeting epidermal growth factor receptor via antibody conjugation undergo molecular specific aggregation when they bind to receptors on cell surfaces, leading to a red shift in their plasmon resonance frequency. Capitalizing on this effect, we demonstrate the efficacy
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