Cesium fluoride (HCID 25953)

Names & identifiers

Preferred name: Cesium fluoride
IUPAC: cesium fluoride
English name: Caesium fluoride
Molecular formula: CsF
Molecular weight: 151.9

Names & synonyms

CESIUM FLUORIDECaesium fluoride13400-13-0Cesium monofluorideCesium fluoride (CsF)T76A371HJRNSC-84270DTXSID30893927RefChem:124638DTXCID501323967236-487-3cesium;fluoride

Show more names

Cesium FlorideCsF, CesiuM fluorideB2TBM600LAMC2

Dicesium difluoridecaesium(1+) fluorideMFCD00010960CSFTricesium trifluorideCesium Monofluoride; NSC 84270EINECS 236-487-3NSC 84270

Database identifiers

CAS: 13400-13-0
PubChem CID: 25953
DTXSID: DTXSID30893927
UNII: T76A371HJR
EC Number: 236-487-3
Nikkaji: J43.758A

Properties

Computed structural properties

Topological polar surface area: 0 Å²
Hydrogen bond donors: 0
Hydrogen bond acceptors: 1
Rotatable bonds: 0
Heavy atoms: 2
Formal charge: 0
Complexity: 2

Experimental & physicochemical properties

Density4.64 @25 °C

Boiling Point1251 °C @760 [mm Hg]

Melting Point703 °C

Physical DescriptionDeliquescent solid; [Hawley] White odorless crystalline solid; [MSDSonline]

Physicochemical properties

Melting point: 682 °C · 682 °C(lit.)
Boiling point: 1251 °C · 1251 °C
Density: 4.115 g/mL · 4.115 g/mL at 25 °C(lit.)
vapor pressure: 0 Pa · 0Pa at 25℃
Flash point: 1251 °C · 1251°C
storage temp.: 0 · 0-6°C
solubility: 2 O: · H2O: 3 M at 20 °C, clear, colorless
form: Powder/Lump
color: White
Specific Gravity: 4.115 · 4.115
PH: 6.5 · 6.5-7.5 (25℃, 3M in H2O)
Water Solubility: 369 g/100 · 369 g/100 mL (18 ºC)
Specific Heat Capacity: 0.34 J/ · Cp(crystal): 0.34 J/(g·K), at 25℃
Crystal Structure: NaCl type
Sensitive: Hygroscopic
λmax: 260 nm · λ: 260 nm Amax: 0.05λ: 280 nm Amax: 0.05
Merck: 14 · 14,2012
crystal system: Cube
Space group: 3 m · Fm3m
Lattice constant: a/nm
Symbol(GHS): 5 · GHS05,GHS06
Signal word: Danger
Hazard statements: 301 · H301+H311+H331-H314
Precautionary statements: 501 · P501-P260-P270-P271-P264-P280-P361+P364-P303+P361+P353-P301+P330+P331-P301+P310+P330-P304+P340+P310-P305+P351+P338+P310-P403+P233-P405
target organs: Kidney,Adrenal gland
PPE: 3 · Eyeshields, Faceshields, Gloves, type P3 (EN 143) respirator cartridges
Hazard Codes: T,C
Risk Statements: 23 · 23/24/25-34-62-41-38-32
Safety Statements: 26 · 26-36/37/39-45
RIDADR: 2923 · UN 2923 8/PG 2
WGK Germany: 3 · 3
RTECS: 9650000 · FK9650000
F: 3 · 3-10
Hazard Note: Corrosive
TSCA: TSCA listed
HazardClass: 6.1 · 6.1
PackingGroup: III
HS Code: 28261990 · 28261990
Storage Class: 11 · 11 - Combustible Solids
Hazard Classifications: 4 OralAquatic · Acute Tox. 4 OralAquatic Chronic 3Eye Dam. 1Repr. 2STOT RE 2
REACH Registrations: Active
Limited Quantities: 1 Kg · 1 Kg (2.2 lbs) (solid)
Excepted Quantities: Max Inner Pack (30g or 30ml) and Max Outer Pack (500g or 500ml)

Safety & regulation

GHS classification

GHS Classification · 5 items

Danger

H301+H311+H331 (44.4%): Toxic if swallowed, in contact with skin or if inhaled [Danger Acute toxicity, oral; acute toxicity, dermal; acute toxicity, inhalation]；H301 (95.6%): Toxic if swallowed [Danger Acute toxicity, oral]；H311 (95.6%): Toxic in contact with skin [Danger Acute toxicity, dermal]；H314 (21.1%): Causes severe skin burns and eye damage [Danger Skin corrosion/irritation]；H315 (76.7%): Causes skin irritation [Warning Skin corrosion/irritation]；H318 (80%): Causes serious eye damage [Danger Serious eye damage/eye irritation]；H331 (91.1%): Toxic if inhaled [Danger Acute toxicity, inhalation]；H361 (46.7%): Suspected of damaging fertility or the unborn child [Warning Reproductive toxicity]

P203, P260, P261, P262, P264, P264+P265, P270, P271, P280, P301+P316, P301+P330+P331, P302+P352, P302+P361+P354, P304+P340, P305+P354+P338, P316, P317, P318, P321, P330, P332+P317, P361+P364, P362+P364, P363, P403+P233, P405, and P501 (click each P-code to see the statement)

Aggregated GHS information provided per 90 reports by companies from 10 notifications to the ECHA C&L Inventory. Each notification may be associated with multiple companies.；Information may vary between notifications depending on impurities, additives, and other factors. The percentage value in parenthesis indicates the notified classification ratio from companies that provide hazard codes. Only hazard codes with percentage values above 10% are shown. For more detailed information, please visit ECHA C&L website.

Hazard information

Regulatory Information · 3 items

Chemical: Cesium fluoride (CsF)

Status: Active Update: 23-01-2023 https://echa.europa.eu/registration-dossier/-/registered-dossier/26172

Cesium fluoride: Does not have an individual approval but may be used under an appropriate group standard

Other Safety InformationEvaluation - Cesium salts

Hazards SummaryPoisonous; [Hawley] Corrosive to skin and eyes; [eChemPortal: ERMA] An irritant; Can be absorbed through skin; [MSDSonline] See FLUORIDES.

Hazard Classes and CategoriesAcute Tox. 3 (95.6%)；Acute Tox. 3 (95.6%)；Skin Corr. 1C (21.1%)；Skin Irrit. 2 (76.7%)；Eye Dam. 1 (80%)；Acute Tox. 3 (91.1%)；Repr. 2 (46.7%)

Safety & protection

Exposure Control and Personal Protection · 2 items

Biological Exposure Indices (BEI) [ACGIH] - Fluorides in urine = 2 mg/L prior to shift or 3 mg/L at end of shift; (Repeated measurements recommended.)

1.0 [mg/m3], inhalable fraction, as F[German Research Foundation (DFG)]

Threshold Limit Values (TLV)2.5 [mg/m3], as F

Permissible Exposure Limit (PEL)2.5 [mg/m3], as F

Protective Action Criteria (PAC) · 3 items

1.5 [mg/m3]

17 [mg/m3]

99 [mg/m3]

Toxicology

Adverse EffectsDermatotoxin - Skin burns.

Regulatory information

Regulatory Information · 3 items

Chemical: Cesium fluoride (CsF)

Status: Active Update: 23-01-2023 https://echa.europa.eu/registration-dossier/-/registered-dossier/26172

Cesium fluoride: Does not have an individual approval but may be used under an appropriate group standard

Safety data

F: 3-10
PPE: Eyeshields, Faceshields, Gloves, type P3 (EN 143) respirator cartridges
wgk: 3
tsca: TSCA listed
rtecs: FK9650000
ridadr: UN 2923 8/PG 2
hs_code: 28261990
risk_code: 23/24/25-34-62-41-38-32
Signal word: Danger
Symbol(GHS): GHS05,GHS06
hazard_code: T,C
hazard_note: Corrosive
safety_code: 26-36/37/39-45
hazard_class: 6.1
Storage Class: 11 - Combustible Solids
packing_group: III
target organs: Kidney,Adrenal gland
Hazard statements: H301+H311+H331-H314
Limited Quantities: 1 Kg (2.2 lbs) (solid)
Excepted Quantities: Max Inner Pack (30g or 30ml) and Max Outer Pack (500g or 500ml)
REACH Registrations: Active
Hazard Classifications: Acute Tox. 4 OralAquatic Chronic 3Eye Dam. 1Repr. 2STOT RE 2
Precautionary statements: P501-P260-P270-P271-P264-P280-P361+P364-P303+P361+P353-P301+P330+P331-P301+P310+P330-P304+P340+P310-P305+P351+P338+P310-P403+P233-P405

Chemistry & industry

Uses & manufacturing

Uses · 3 items

Used to make optics and specialty glasses; [Hawley] Used as a catalyst, an inorganic scintillator, and a fluoride source in organic synthesis; [Merck Index]

Glass Manufacturing [Category: Industry]

Glassblowing [Category: Hobbies]

General Manufacturing InformationCesium fluoride (CsF): ACTIVE

Applications · 6 items

DescriptionCaesium fluoride can be used as an analytical reagent, and also for the manufacture of optical crystals It can be used for the preparation of fluorinated isocyanate. During the Suzuki cross-coupling synthesis reaction, it can be used as a base for the positive substitution of the biaryls compound; it can also be used as a nucleophile for the fluorination of protic mediate such as the halide and sulfonate contained in tert-butyl alcohol or t-amyl alocohol. It can also be used as catalyst for the Silyl enol ether reaction of carbonyl compounds; used for efficient synthesis of single crystal Dion-Jacobson phase CsLaTa2O7 tto be applied to photocatalytic and superconductivity.

UsesUsed as a base in a Suzuki cross-coupling synthesis of ortho-substituted biaryls.5 Also employed as a reagent for nucleophilic fluorination of primary halides and sulfonates in protic media such as tert-butyl and tert-pentyl alcohols.6

UsesA preperation of building block for synthesis of fluoroallylic compounds.

UsesCesium fluoride is an inorganic compound with the chemical formula CsF, which is a hygmoscopic white salt. Cesium fluoride can be used as a source of fluoride anion for organic synthesis. Caesium has the highest electropositivity of all non-radioactive elements and fluorine has the highest electronegativity of all elements.

UsesCatalyst in oxidation reactions; as a solid base when adsorbed onto Celite, q.v. Fluoride source in organic synthesis. Inorganic scintillator.

General DescriptionCesium fluoride is an inorganic compound known to be a source of fluoride ion and a catalyst in organic synthesis. It has been used in many organic reactions like 1,4elimination, desilylation, transesterification, acylation, nucleophilic aromatic substitution, etherification, crosscoupling reactions and so on.