Hafnium tetrafluoride
Basic information
- CAS
13709-52-9- Standard SMILES
[F][Hf]([F])([F])[F]- InChIKey
QHEDSQMUHIMDOL-UHFFFAOYSA-J- Molecular formula
- F4Hf
- Average molar mass
- 254.48 g/mol
- Monoisotopic mass
- 255.94017
Names & identifiers
- Preferred name
- Hafnium tetrafluoride
- IUPAC
- tetrafluorohafnium
- English name
- HAFNIUM FLUORIDE
- Molecular formula
- F4Hf
- Molecular weight
- 254.48
Names & synonyms
13709-52-9Hafnium tetrafluorideHafnium (IV) FluorideRefChem:783343DTXCID001527479EINECS 237-258-0237-258-0DTXSID30929710Hafnium fluorideHafnium(IV) fluorideHafnium fluoride (HfF4), (T-4)-MFCD00016127
Show more names
Hafnium fluoride/ 99.9%HAFNIUM FLUORIDE, 99.99%Hafnium(IV) fluoride,98%hafnium(4+):tetrafluorideHAFNIUM TETRAFLUORIDE 99%Hafnium tetrafluoride 99.9%HafniuM(IV) fluoride, 98% 5GR
HfF4SCHEMBL1538680SBB101456SY064751CS-0144746Q4493197Hafnium(IV) fluoride, 99.9% trace metals basis (purity excludes up to ~1% zirconium)
Database identifiers
- CAS
13709-52-9- PubChem CID
- 4092293
- EC Number
- 237-258-0
Properties
Computed structural properties
- Topological polar surface area
- 0 Ų
- Hydrogen bond donors
- 0
- Hydrogen bond acceptors
- 4
- Rotatable bonds
- 0
- Heavy atoms
- 5
- Formal charge
- 0
- Complexity
- 19.1
Experimental & physicochemical properties
Chemical ClassesMetals -> Metals, Inorganic Compounds
Physical DescriptionWhite powder; [Alfa Aesar MSDS]
Physicochemical properties
- Melting point
- 310 °C · 310°C (subl.)
- Boiling point
- 970 °C · 970°C
- Density
- 7.1 · 7.100
- solubility
- 2 O · reacts with H2O
- form
- Powder
- color
- White
- Water Solubility
- React with water.
- Sensitive
- Moisture Sensitive
- Exposure limits
- 2.5 mg/m3; · ACGIH: TWA 2.5 mg/m3; TWA 0.5 mg/m3NIOSH: IDLH 250 mg/m3; IDLH 50 mg/m3; TWA 0.5 mg/m3
- InChI
- 1S/4FH.Hf/h4*1H;/q;;;;+4/p-4
- InChIKey
- QHEDSQMUHIMDOL-UHFFFAOYSA-J
- SMILES
- F[Hf](F)(F)F
Safety & regulation
Safety information is for reference only and does not replace the supplier’s Safety Data Sheet (SDS), applicable regulations, or professional assessment.
GHS classification
GHS Classification
This chemical does not meet GHS hazard criteria for 2.2% (1 of 45) of reports.
Danger
H315 (88.9%): Causes skin irritation [Warning Skin corrosion/irritation]
P261, P264, P264+P265, P271, P280, P302+P352, P304+P340, P305+P354+P338, P316, P317, P319, P321, P332+P317, P362+P364, P403+P233, P405, and P501 (click each P-code to see the statement)
Aggregated GHS information provided per 45 reports by companies from 5 notifications to the ECHA C&L Inventory. Each notification may be associated with multiple companies.
Hazard information
Hazards SummaryCauses burns; Inhalation may cause corrosive injuries to upper respiratory tract and lungs; Toxic by ingestion, inhalation, and skin absorption; [Alfa Aesar MSDS] See Hafnium. See Zirconium fluoride.
Hazard Classes and CategoriesSkin Irrit. 2 (88.9%)
Safety & protection
Exposure Control and Personal Protection
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)0.5 [mg/m3], as Hf (2.5 mg/m3, as F)
Permissible Exposure Limit (PEL)0.5 [mg/m3], as Hf (2.5 mg/m3, as F)
Immediately Dangerous to Life or Health (IDLH)
Chemistry & industry
Applications
UsesHafnium(IV) fluoride is used as Vacuum deposition.
Preparation methods
PreparationHafnium tetrafluoride may be prepared by passing anhydrous hydrogen fluoride over hafnium tetrachloride at 300°C: HfCl4 + 4HF HfF4 + HCl Another method of preparation involves thermal decomposition of ammonium fluorohafnate, (NH4)2 HfF6 [16925-24-9] in the absence of air: (NH4)2 HfF6 HfF4 + 2NH3 + 2HF Also, HfF4 can be prepared by treating metallic hafnium with 40% aqueous HF. The monohydrate formed may be heated at 350°C for several days under a flow of fluorine and nitrogen to yield anhydrous HfF4. Hf + 4HF (aq) → HfF4•H2O + 2H2
Upstream & downstream products
Upstream raw materials
Related reactions
0 records
No reaction records under the current filter.
Compound notes
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