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Sigma-Aldrich

Cesium fluoride

99.9% trace metals basis

Synonym(s):

NSC 84270

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About This Item

Empirical Formula (Hill Notation):
CsF
CAS Number:
13400-13-0
Molecular Weight:
151.90
EC Number:
236-487-3
MDL number:
MFCD00010960
UNSPSC Code:
12352302
PubChem Substance ID:
24857410
NACRES:
NA.22

Assay

99.9% trace metals basis

mp

682 °C (lit.)

density

4.115 g/mL at 25 °C (lit.)

SMILES string

[F-].[Cs+]

InChI

1S/Cs.FH/h;1H/q+1;/p-1

InChI key

XJHCXCQVJFPJIK-UHFFFAOYSA-M

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Application

Reactant for:
  • Preparation of building blocks for synthesis of fluoroallylic compounds
  • Synthesis of alcohols via hydrolysis of alkyl silyl ethers at neutral pH in buffered mixed organic-aqueous solutions
  • Nucleophilic fluorination of alkynyliodonium salts to form fluorovinylic compounds
  • Nucleophilic aromatic substitution (SNAr) reactions
Used in the successful synthesis of a single-crystal Dion-Jacobson phase, CsLaTa2O7, that has applications in photocatalysis and superconductivity.
Used as a base in a Suzuki cross-coupling synthesis of ortho-substituted biaryls. Also employed as a reagent for nucleophilic fluorination of primary halides and sulfonates in protic media such as tert-butyl and tert-pentyl alcohols.

Signal Word

Danger

Hazard Statements

H302,H318,H361d,H373,H412

Hazard Classifications

Acute Tox. 4 Oral - Aquatic Chronic 3 - Eye Dam. 1 - Repr. 2 - STOT RE 2

Target Organs

Kidney,Adrenal gland

Supplementary Hazards

EUH032

Storage Class Code

11 - Combustible Solids

WGK

WGK 2

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

Certificates of Analysis (COA)

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Dong Wook Kim et al.
Journal of the American Chemical Society, 128(50), 16394-16397 (2006-12-15)
Aprotic solvents are usually preferred for the SN2 reactions, because nucleophilicity and hence SN2 reactivity are severely retarded by the influence of the partial positive charge of protic solvents. In this work, we introduce a remarkable effect of using tertiary
Journal of Organometallic Chemistry, 691, 5688-5688 (2006)
Takashi Okitsu et al.
Chemical communications (Cambridge, England), (47)(47), 6330-6332 (2008-12-03)
A highly efficient and rapid total synthesis of 9Z-retinoic acid was accomplished by caesium fluoride-promoted Stille coupling reaction; using a common building block, 9Z-retinoic acid analogues were also prepared by the same method without isomerisation of the Z-double bond.
S Nelson et al.
Science (New York, N.Y.), 265(5173), 774-777 (1994-08-05)
Neurons in the primary visual cortex of the cat are selectively activated by stimuli with particular orientations. This selectivity can be disrupted by the application of antagonists of the inhibitory neurotransmitter gamma-aminobutyric acid (GABA) to a local region of the
Nongmaithem Jiten Singh et al.
The journal of physical chemistry. B, 110(8), 3808-3815 (2006-02-24)
The structures, stabilities, thermodynamic quantities, dissociation energies, infrared spectra, and electronic properties of CsF hydrated by water molecules are investigated by using density functional theory, Møller-Plesset second-order perturbation theory (MP2), coupled cluster theory with singles, doubles, and perturbative triples excitations
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