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512990

Sigma-Aldrich

2,4,6,8-Tetramethylcyclotetrasiloxane

≥98.5%, ≥99.999% trace metals basis

Sinônimo(s):

1,3,5,7-Cyclotetra(methylsiloxane), 1,3,5,7-Tetramethylcyclotetrasiloxane, TMCTS

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25 ML
R$ 2.711,00
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25 ML
R$ 2.711,00
100 ML
R$ 5.094,00

About This Item

Fórmula linear:
(HSiCH3O)4
Número CAS:
Peso molecular:
240.51
Beilstein:
1775282
Número CE:
Número MDL:
Código UNSPSC:
12352103
ID de substância PubChem:
NACRES:
NA.23

R$ 2.711,00


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Nível de qualidade

Ensaio

≥98.5%
≥99.999% trace metals basis

Formulário

liquid

índice de refração

n20/D 1.387 (lit.)

p.e.

134 °C (lit.)

pf

−69 °C (lit.)

densidade

0.986 g/mL at 25 °C (lit.)

temperatura de armazenamento

2-8°C

cadeia de caracteres SMILES

C[SiH]1O[SiH](C)O[SiH](C)O[SiH](C)O1

InChI

1S/C4H16O4Si4/c1-9-5-10(2)7-12(4)8-11(3)6-9/h9-12H,1-4H3

chave InChI

BQYPERTZJDZBIR-UHFFFAOYSA-N

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Descrição geral

Atomic number of base material: 14 Silicon

Características e benefícios

Precursor for gate dielectrics in thin-film transistors (TFT), and is a component of photochemically formed SiOX monolayers on TiO.

Pictogramas

Flame

Palavra indicadora

Warning

Frases de perigo

Declarações de precaução

Classificações de perigo

Flam. Liq. 3

Código de classe de armazenamento

3 - Flammable liquids

Classe de risco de água (WGK)

WGK 3

Ponto de fulgor (°F)

75.2 °F - closed cup

Ponto de fulgor (°C)

24 °C - closed cup

Equipamento de proteção individual

Eyeshields, Faceshields, Gloves, type ABEK (EN14387) respirator filter


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Dae-Yoon Kim et al.
Soft matter, 11(1), 58-68 (2014-11-20)
Unconventional star-shaped liquid crystals (abbreviated as SiLCs) were successfully synthesized by chemically connecting four cyanobiphenyl anisotropic mesogens to the periphery of a super-hydrophobic and ultra-flexible cyclic tetramethyltetrasiloxane ring with flexible hexyl chains. Based on the combined experimental techniques of differential

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Spintronics offer breakthroughs over conventional memory/logic devices with lower power, leakage, saturation, and complexity.

Hybrid organic-inorganic sol-gel materials containing silica were first called “ORMOSILs” in 1984.

Questions

1–2 of 2 Questions  
  1. 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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  2. 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

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