This compound is a neat or pure liquid with a melting point of 16 °C. The product has not been diluted in any solvent or buffer.
194905
12-Crown-4
98%
Sinônimo(s):
1,4,7,10-Tetraoxacyclododecane
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1 G
R$ 515,00
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R$ 1.218,00
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1 G
R$ 515,00
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About This Item
Fórmula empírica (Notação de Hill):
C8H16O4
Número CAS:
Peso molecular:
176.21
Beilstein:
1363064
Número CE:
Número MDL:
Código UNSPSC:
12352005
ID de substância PubChem:
NACRES:
NA.22
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Nível de qualidade
Ensaio
98%
Formulário
liquid
índice de refração
n20/D 1.463 (lit.)
p.e.
61-70 °C/0.5 mmHg (lit.)
pf
16 °C (lit.)
densidade
1.089 g/mL at 25 °C (lit.)
grupo funcional
ether
cadeia de caracteres SMILES
C1COCCOCCOCCO1
InChI
1S/C8H16O4/c1-2-10-5-6-12-8-7-11-4-3-9-1/h1-8H2
chave InChI
XQQZRZQVBFHBHL-UHFFFAOYSA-N
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Descrição geral
Aplicação
12-Crown-4 can be used as:
- A promoter in the synthesis of poly(diethylsiloxane) (PDES) from monomer hexaethylcyclotrisiloxane using NaOH as a catalyst via anionic ring-opening polymerization.[4]
- As an additive in the preparation of triarylmethane derivatives by palladium-catalyzed cross coupling reaction of aryl bromides with diarylmethane derivatives.[5]
- A phase transfer catalyst in organic synthesis.[6]
Palavra indicadora
Danger
Frases de perigo
Declarações de precaução
Classificações de perigo
Acute Tox. 1 Inhalation
Código de classe de armazenamento
6.1A - Combustible acute toxic Cat. 1 and 2 / very toxic hazardous materials
Classe de risco de água (WGK)
WGK 3
Ponto de fulgor (°F)
235.4 °F - closed cup
Ponto de fulgor (°C)
113 °C - closed cup
Equipamento de proteção individual
Eyeshields, Faceshields, Gloves, type ABEK (EN14387) respirator filter
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Multilayered ion-imprinted membranes with high selectivity towards Li+ based on the synergistic effect of 12-crown-4 and polyether sulfone
Lu J, et al.
Applied Surface Science, 427, 931-941 (2018)
Márkó Grabarics et al.
The Analyst, 145(19), 6313-6333 (2020-07-28)
In the past decade, ion mobility spectrometry (IMS) in combination with mass spectrometry (IM-MS) became a widely employed technique for the separation and structural characterization of ionic species in the gas phase. Similarly to chromatography, where studies on the mechanism
Preparation of poly (diethylsiloxane) with the NaOH/12-crown-4 catalyst
Hedden RC and Cohen C
Polymer, 41(18), 6975-6979 (2000)
Mazhar Ali Abbasi et al.
Sensors (Basel, Switzerland), 12(11), 15424-15437 (2012-12-04)
In this study honeycomb-like NiO nanostructures were grown on nickel foam by a simple hydrothermal growth method. The NiO nanostructures were characterized by field emission electron microscopy (FESEM), high resolution transmission electron microscopy (HRTEM) and X-ray diffraction (XRD) techniques. The
Zehra Edis et al.
Pathogens (Basel, Switzerland), 8(4) (2019-10-30)
Antimicrobial agents containing symmetrical triiodides complexes with halogen bonding may release free iodine molecules in a controlled manner. This happens due to interactions with the plasma membrane of microorganisms which lead to changes in the structure of the triiodide anion.
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Regarding product 194905- 12-Crown-4. I received the product in liquid form, as mentioned. I want to know in which liquid the 12-Crown-4 is dissolved.Is it in any solvent or water?
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How can I determine the shelf life / expiration / retest date of this product?
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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.pdfHelpful?
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How is shipping temperature determined? And how is it related to the product storage temperature?
1 answer-
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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