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440345

Supelco

Glass spheres

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100 G
$36.38
500 G
$99.63

$36.38

Precio de catálogo$39.80Ahorre 9 %
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100 G
$36.38
500 G
$99.63

About This Item

Fórmula empírica (notación de Hill):
O2Si
Número de CAS:
65997-17-3
Peso molecular:
60.08
Número CE:
266-046-0
Número MDL:
MFCD00147032
Código UNSPSC:
23201100
ID de la sustancia en PubChem:
24867590
NACRES:
SB.52

$36.38

Precio de catálogo$39.80Ahorre 9 %
Web-Only Promotion

Disponible para envío el24 de abril de 2025Detalles

Solicitar un pedido a granel

grado

high-purity grade

Nivel de calidad

100

Formulario

powder

técnicas

LPLC: suitable

superficie

125 m2/g

Matriz

Silica

grupo activo de la matriz

silica

tamaño medio de partícula

9-13 μm

densidad

1.1 g/mL at 25 °C (lit.)

idoneidad

suitable for acidity or alkalinity (alkalinity < 0.5 meq/g ASTM D 3100)

cadena SMILES

O=[Si]=O

InChI

1S/O2Si/c1-3-2

Clave InChI

VYPSYNLAJGMNEJ-UHFFFAOYSA-N

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Descripción general

Silica is a naturally occurring material in minerals, flint and in some plants in crystalline phase. Silica 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.[1]

Aplicación

Low density filler for coatings and plastics.
Silica glass spheres are low density filler for coatings and plastics. Silica was used in synthesis of silicalite.[2] Silica was also used to assist the catalytic growth of oxide and nitride nanowires.[3]

Características y beneficios

Light weight, crush-resistant filler. Imparts dimensional stability, reduces warpage, reduces plastic melt viscosity and provides multidirectional orientation in reinforced composites.

Forma física

Hollow, spherical non-porous glass beads.

Código de clase de almacenamiento

11 - Combustible Solids

Clase de riesgo para el agua (WGK)

WGK 1

Punto de inflamabilidad (°F)

Not applicable

Punto de inflamabilidad (°C)

Not applicable

Equipo de protección personal

Eyeshields, Gloves, type P3 (EN 143) respirator cartridges

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Certificados de análisis (COA)

Lot/Batch Number
0000379889
0000379889
MKCV8794
MKCV8793
MKCT0930

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Sigma-Aldrich

G9018

Glass beads, unwashed

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Sigma-Aldrich

G1277

Glass beads, acid-washed

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)
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
Yijun Yao et al.
Journal of hazardous materials, 298, 221-231 (2015-06-10)
In 2002, U.S. EPA proposed a general buffer zone of approximately 100 feet (30 m) laterally to determine which buildings to include in vapor intrusion (VI) investigations. However, this screening distance can be threatened by factors such as extensive surface
Keren B Turton et al.
PloS one, 10(5), e0127243-e0127243 (2015-05-20)
Signal transducer and activator of transcription 3 (STAT3) is a key mediator of leukocyte differentiation and proliferation. The 3' end of STAT3 transcripts is subject to two alternative splicing events. One results in either full-length STAT3α or in STAT3β, which
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Questions

1–2 of 2 Questions  

  1. How can I determine the shelf life / expiration / retest date of this product?

    1 answer

    1. If this product has an expiration or retest date, it will be shown on the Certificate of Analysis (COA, CofA). If there is no retest or expiration date listed on the product's COA, we do not have suitable stability data to determine a shelf life. For these products, the only date on the COA will be the release date; a retest, expiration, or use-by-date will not be displayed.
      For all products, we recommend handling per defined conditions as printed in our product literature and website product descriptions. We recommend that products should be routinely inspected by customers to ensure they perform as expected.
      For products without retest or expiration dates, our standard warranty of 1 year from the date of shipment is applicable.
      For more information, please refer to the Product Dating Information document: https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/marketing/global/documents/449/386/product-dating-information-mk.pdf

      Helpful?

  2. How is shipping temperature determined? And how is it related to the product storage temperature?

    1 answer

    1. Products may be shipped at a different temperature than the recommended long-term storage temperature. If the product quality is sensitive to short-term exposure to conditions other than the recommended long-term storage, it will be shipped on wet or dry-ice. If the product quality is NOT affected by short-term exposure to conditions other than the recommended long-term storage, it will be shipped at ambient temperature. As shipping routes are configured for minimum transit times, shipping at ambient temperature helps control shipping costs for our customers. For more information, please refer to the Storage and Transport Conditions document: https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/marketing/global/documents/316/622/storage-transport-conditions-mk.pdf

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