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440345

Supelco

Glaskugeln

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About This Item

Empirische Formel (Hill-System):
O2Si
CAS-Nummer:
65997-17-3
Molekulargewicht:
60.08
EG-Nummer:
266-046-0
MDL-Nummer:
MFCD00147032
UNSPSC-Code:
23201100
PubChem Substanz-ID:
24867590
NACRES:
SB.52

€ 36,40

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Qualität

high-purity grade

Qualitätsniveau

100

Form

powder

Methode(n)

LPLC: suitable

Oberflächenbereich

125 m2/g

Matrix

Silica

Aktive Matrixgruppe

silica

Mittlere Partikelgröße

9-13 μm

Dichte

1.1 g/mL at 25 °C (lit.)

Eignung

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

SMILES String

O=[Si]=O

InChI

1S/O2Si/c1-3-2

InChIKey

VYPSYNLAJGMNEJ-UHFFFAOYSA-N

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Allgemeine Beschreibung

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]

Anwendung

Füllstoff mit geringer Dichte für Beschichtungen und Kunststoffe.
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]

Leistungsmerkmale und Vorteile

Leichtgewichtiger, druckfester Füllstoff. Verleiht Formstabilität, reduziert Verzug, reduziert Kunststoff Schmelzviskosität und liefert multidirektionale Orientierung in verstärkten Kompositen.

Physikalische Form

hohle, sphärische porenfreie Glaskügelchen

Lagerklassenschlüssel

11 - Combustible Solids

WGK

WGK 1

Flammpunkt (°F)

Not applicable

Flammpunkt (°C)

Not applicable

Persönliche Schutzausrüstung

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

Hier finden Sie alle aktuellen Versionen:

Analysenzertifikate (COA)

Lot/Batch Number
0000379889
0000379889
MKCV8794
MKCV8793
MKCT0930

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Sigma-Aldrich

Sigma-Aldrich

G9018

Glass beads, unwashed

Glas-Beads, säuregereinigt 212-300&#160;&#956;m (50-70 U.S. sieve)

Sigma-Aldrich

G1277

Glas-Beads, säuregereinigt

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
Silica-assisted catalytic growth of oxide and nitride nanowires.
Tang, C. C., et al.
Chemical Physics Letters, 333, 12-15 (2001)
The Heat Capacities of Quartz, Cristobalite and Tridymite at Low Temperatures
Anderson, C. Travis.
Journal of the American Chemical Society, 58, 568-570 (1936)
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
C Uhrenfeldt et al.
Optics express, 23(11), A525-A538 (2015-06-16)
Plasmonic resonances in metal nanoparticles are considered candidates for improved thin film Si photovoltaics. In periodic arrays the influence of collective modes can enhance the resonant properties of such arrays. We have investigated the use of periodic arrays of Al
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Questions

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  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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