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%
Sinonimo/i:
1,4,7,10-Tetraoxacyclododecane
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1 G
CHF 50.40
5 G
CHF 134.00
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1 G
CHF 50.40
5 G
CHF 134.00
About This Item
Formula empirica (notazione di Hill):
C8H16O4
Numero CAS:
Peso molecolare:
176.21
Beilstein:
1363064
Numero CE:
Numero MDL:
Codice UNSPSC:
12352005
ID PubChem:
NACRES:
NA.22
Prodotti consigliati
Livello qualitativo
Saggio
98%
Stato
liquid
Indice di rifrazione
n20/D 1.463 (lit.)
P. ebollizione
61-70 °C/0.5 mmHg (lit.)
Punto di fusione
16 °C (lit.)
Densità
1.089 g/mL at 25 °C (lit.)
Gruppo funzionale
ether
Stringa SMILE
C1COCCOCCOCCO1
InChI
1S/C8H16O4/c1-2-10-5-6-12-8-7-11-4-3-9-1/h1-8H2
XQQZRZQVBFHBHL-UHFFFAOYSA-N
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Descrizione generale
Applicazioni
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]
Avvertenze
Danger
Indicazioni di pericolo
Consigli di prudenza
Classi di pericolo
Acute Tox. 1 Inhalation
Codice della classe di stoccaggio
6.1A - Combustible acute toxic Cat. 1 and 2 / very toxic hazardous materials
Classe di pericolosità dell'acqua (WGK)
WGK 3
Punto d’infiammabilità (°F)
235.4 °F - closed cup
Punto d’infiammabilità (°C)
113 °C - closed cup
Dispositivi di protezione individuale
Eyeshields, Faceshields, Gloves, type ABEK (EN14387) respirator filter
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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.
Free inorganic, organic, and organometallic ions by treatment of their lithium salts with 12-crown-4
Power PP, et al.
Accounts of Chemical Research, 21(4), 147-153 (1988)
1, 4, 7, 10-Tetraoxacyclododecane (12-crown-4) as neutral carrier for lithium ion in lithium ion selective electrode
Gadzekpo VPY and Christian GD
Analytical Letters, 16(17-18), 1371-1380 (1983)
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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?
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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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