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.
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194905
12-Crown-4
98%
Synonim(y):
1,4,7,10-Tetraoxacyclododecane
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About This Item
Wzór empiryczny (zapis Hilla):
C8H16O4
Numer CAS:
Masa cząsteczkowa:
176.21
Beilstein:
1363064
Numer WE:
Numer MDL:
Kod UNSPSC:
12352005
Identyfikator substancji w PubChem:
NACRES:
NA.22
180,00 zł
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Polecane produkty
Poziom jakości
Próba
98%
Formularz
liquid
współczynnik refrakcji
n20/D 1.463 (lit.)
bp
61-70 °C/0.5 mmHg (lit.)
mp
16 °C (lit.)
gęstość
1.089 g/mL at 25 °C (lit.)
grupa funkcyjna
ether
ciąg SMILES
C1COCCOCCOCCO1
InChI
1S/C8H16O4/c1-2-10-5-6-12-8-7-11-4-3-9-1/h1-8H2
Klucz InChI
XQQZRZQVBFHBHL-UHFFFAOYSA-N
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Opis ogólny
Zastosowanie
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]
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Hasło ostrzegawcze
Danger
Zwroty wskazujące rodzaj zagrożenia
Zwroty wskazujące środki ostrożności
Klasyfikacja zagrożeń
Acute Tox. 1 Inhalation
Kod klasy składowania
6.1A - Combustible acute toxic Cat. 1 and 2 / very toxic hazardous materials
Klasa zagrożenia wodnego (WGK)
WGK 3
Temperatura zapłonu (°F)
235.4 °F - closed cup
Temperatura zapłonu (°C)
113 °C - closed cup
Środki ochrony indywidualnej
Eyeshields, Faceshields, Gloves, type ABEK (EN14387) respirator filter
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Dokumenty związane z niedawno zakupionymi produktami zostały zamieszczone w Bibliotece dokumentów.
Preparation of poly (diethylsiloxane) with the NaOH/12-crown-4 catalyst
Hedden RC and Cohen C
Polymer, 41(18), 6975-6979 (2000)
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.
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)
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
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)
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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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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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