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12-Crown-4

12-Crown-4 Structure
12-Crown-4
  • CAS No.294-93-9
  • Chemical Name:12-Crown-4
  • CBNumber:CB8752442
  • Molecular Formula:C8H16O4
  • Formula Weight:176.21
  • MOL File:294-93-9.mol
12-Crown-4 Property
  • Melting point 16 °C (lit.)
  • Boiling point 61-70 °C/0.5 mmHg (lit.)
  • Density 1.089 g/mL at 25 °C (lit.)
  • refractive index n20/D 1.463(lit.)
  • Flash point >230 °F
  • storage temp. Keep in dark place,Sealed in dry,Room Temperature
  • form Liquid After Melting
  • Specific Gravity 1.115 (20℃)
  • color Clear colorless to slightly yellow
  • Water Solubility MISCIBLE
  • Sensitive Air Sensitive
  • BRN 1363064
  • CAS DataBase Reference 294-93-9(CAS DataBase Reference)
  • EWG's Food Scores 1
  • FDA UNII K6069P2C2A
  • NIST Chemistry Reference 12-Crown-4(294-93-9)
  • EPA Substance Registry System 1,4,7,10-Tetraoxacyclododecane (294-93-9)
  • UNSPSC Code 12352005
  • NACRES NA.22
Safety
  • Hazard Codes  :T+,Xn,Xi
  • Risk Statements  :26-36/37/38-20/21/22
  • Safety Statements  :28-36/37-45-36-26
  • RIDADR  :UN 2810
  • WGK Germany  :3
  • RTECS  :XF0550000
  • F  :3-9-23
  • TSCA  :Yes
  • HazardClass  :6.1
  • PackingGroup  :III
  • HS Code  :29329995
  • Toxicity :LD50 oral in rat: 2830mg/kg
  • NFPA 704:
    1
    4 1
Hazard and Precautionary Statements (GHS)
  • Symbol(GHS)
  • Signal wordDanger
  • Hazard statements H330
  • Precautionary statements P304+P340+P310
12-Crown-4 Price More Price(7)
  • Brand: Sigma-Aldrich(India)
  • Product number: 194905
  • Product name : 12-Crown-4
  • Purity: 98%
  • Packaging: 1G
  • Price: ₹1948.5
  • Updated: 2022/06/14
  • Buy: Buy
  • Brand: Sigma-Aldrich(India)
  • Product number: 194905
  • Product name : 12-Crown-4
  • Purity: 98%
  • Packaging: 5G
  • Price: ₹11972.45
  • Updated: 2022/06/14
  • Buy: Buy
  • Brand: ALFA India
  • Product number: ALF-A11972-14
  • Product name : 12-Crown-4, 98%
  • Purity: 
  • Packaging: 25g
  • Price: ₹57980
  • Updated: 2022/05/26
  • Buy: Buy
  • Brand: TCI Chemicals (India)
  • Product number: C0858
  • Product name : 12-Crown 4-Ether
  • Purity: min. 95.0 %
  • Packaging: 1ML
  • Price: ₹3300
  • Updated: 2022/05/26
  • Buy: Buy
  • Brand: TCI Chemicals (India)
  • Product number: C0858
  • Product name : 12-Crown 4-Ether
  • Purity: min. 95.0 %
  • Packaging: 5ML
  • Price: ₹11500
  • Updated: 2022/05/26
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12-Crown-4 Chemical Properties,Usage,Production

  • Chemical Properties clear colorless to slightly yellow liquid after
  • Uses It serves as an aprotic "solvent" for alkali metals, the sodium solution is a strong reducing agent.
  • Uses 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.

  • Definition ChEBI: A crown ether that is cyclododecane in which the carbon atoms at positions 1, 4, 7 and 10 have been replaced by oxygen atoms.
  • Synthesis Reference(s) Tetrahedron Letters, 15, p. 4029, 1974 DOI: 10.1016/S0040-4039(01)92075-1
  • General Description 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.
  • Purification Methods The distilled crude product has to be recrystallised from pentane at -20o to remove acyclic material. It is then dried over P2O5. It complexes Li. [Anet et al. Acta Chem Scand 27 3395 1973, Beilstein 19/11 V 334.]
12-Crown-4 Preparation Products And Raw materials
Raw materials
Preparation Products
12-Crown-4 Suppliers
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12-Crown-4 Spectrum
294-93-9, 12-Crown-4Related Search:
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  • Chelation/Complexation Compounds
  • 294-93-6
  • 化合物 12-CROWN-4
  • 12-冠醚-4 97% 无色透明液体
  • 12-冠-4,98%
  • 12-冠4-醚
  • 1,4,7,10-四氧(杂)环十二烷
  • 12-冠-4
  • 1,4,7,10-四氧环十二烷
  • 12-冠醚-4
  • 294-93-9
  • 12-C-4
  • 12C4
  • 12 C 4
  • 12-CROWN 4-ETHER
  • 1,4,7,10-TETRAOXACYCLODODECANE
  • Crown
  • 294-93-9 12-Crown-4
  • 12-Crown 4-Ether &gt
  • 12-Crown-4(1,4,7,10-Tetraoxacyclododecane)
  • 12-Crown-4 Cyclic tetraMer of ethylene oxide which is specific for the lithiuM cation., 98%
  • CROWN ETHER/12-CROWN-4 FOR SYNTHESIS
  • 12-Crown-4,97%
  • 1,4,7,10-Tetraoxacyclododecane, 12-Crown-4
  • 12-CROWN-4
  • 1,4,7,10-TETRAOXYCYCLODODECANE
  • Ethylene oxide cyclic tetramer
  • Eoct
  • CROWN ETHER/12-CROWN-4
  • LITHIUM IONOPHORE V

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