Merck
All Photos(1)

194905

Sigma-Aldrich

12-Crown-4

98%

Synonym(s):
1,4,7,10-Tetraoxacyclododecane
Empirical Formula (Hill Notation):
C8H16O4
CAS Number:
Molecular Weight:
176.21
Beilstein:
1363064
Numer EC:
Numer MDL:
Identyfikator substancji w PubChem:
NACRES:
NA.22

Poziom jakości

100

próba

98%

forma

liquid

współczynnik refrakcji

n20/D 1.463 (lit.)

tw

61-70 °C/0.5 mmHg (lit.)

mp

16 °C (lit.)

gęstość

1.089 g/mL at 25 °C (lit.)

SMILES string

C1COCCOCCOCCO1

InChI

1S/C8H16O4/c1-2-10-5-6-12-8-7-11-4-3-9-1/h1-8H2

InChI key

XQQZRZQVBFHBHL-UHFFFAOYSA-N

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Opis ogólny

12-Crown-4 is a crown ether generally used as a ligand in coordination chemistry. It is also known as lithium ionophore because of its strong chelating property specific to lithium cation.

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.
  • As an additive in the preparation of triarylmethane derivatives by palladium-catalyzed cross coupling reaction of aryl bromides with diarylmethane derivatives.
  • A phase transfer catalyst in organic synthesis.

Opakowanie

1, 5 g in glass bottle

piktogramy

Skull and crossbones

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

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

Certificate of Analysis

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Certificate of Origin

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