ChemicalBook > CAS DataBase List > HAFNIUM FLUORIDE
HAFNIUM FLUORIDE
Preparation- Product Name
- HAFNIUM FLUORIDE
- CAS No.
- 13709-52-9
- Chemical Name
- HAFNIUM FLUORIDE
- Synonyms
- HAFNIUM FLUORIDE;HAFNIUM(IV) FLUORIDE;HAFNIUM TETRAFLUORIDE;Hafnium fluoride/ 99.9%;HAFNIUM FLUORIDE, 99.99%;Hafnium(IV) fluoride,98%;hafnium(4+):tetrafluoride;HAFNIUM TETRAFLUORIDE 99%;Hafnium tetrafluoride 99.9%;HafniuM(IV) fluoride, 98% 5GR
- CBNumber
- CB2756332
- Molecular Formula
- F4Hf
- Formula Weight
- 254.48
- MOL File
- 13709-52-9.mol
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HAFNIUM FLUORIDE Property
- Melting point:
- 310°C (subl.)
- Boiling point:
- 970°C
- Density
- 7.100
- solubility
- reacts with H2O
- form
- Powder
- color
- White
- Water Solubility
- React with water.
- Sensitive
- Moisture Sensitive
- Exposure limits
- ACGIH: TWA 2.5 mg/m3; TWA 0.5 mg/m3
NIOSH: IDLH 250 mg/m3; IDLH 50 mg/m3; TWA 0.5 mg/m3 - CAS DataBase Reference
- 13709-52-9(CAS DataBase Reference)
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Safety
- Hazard Codes
- Xi,T
- Risk Statements
- 32-36/37/38-41-23-37/38
- Safety Statements
- 26-36-45-36/37/39
- RIDADR
- UN 2923 8/PG 2
- WGK Germany
- 3
- Hazard Note
- Irritant
- TSCA
- Yes
- HazardClass
- 6.1
- PackingGroup
- II
- HS Code
- 28261990
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Hazard and Precautionary Statements (GHS)
- Symbol(GHS)
-
- Signal word
- Danger
- Hazard statements
-
H315Causes skin irritation
H318Causes serious eye damage
H331Toxic if inhaled
H335May cause respiratory irritation
- Precautionary statements
-
P280Wear protective gloves/protective clothing/eye protection/face protection.
P302+P352IF ON SKIN: wash with plenty of soap and water.
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N-Bromosuccinimide Price
Sigma-Aldrich
- Product number
- 399868
- Product name
- Hafnium(IV) fluoride
- Purity
- 99.9% trace metals basis (purity excludes up to ~1% zirconium)
- Packaging
- 25g
- Price
- $352
- Updated
- 2022/05/15
Chem-Impex
- Product number
- 35562
- Product name
- Hafnium(IV) fluoride
- Purity
- ≥99.9% Metals basis excluding Zr (Zr : 2 - 4%)
- Packaging
- 1G
- Price
- $35
- Updated
- 2021/12/16
Chem-Impex
- Product number
- 35561
- Product name
- Hafnium(IV)fluoride,99.9%Metalsbasis(Hf:65-72%)
- Purity
- 99.9%Metalsbasis(Hf:65-72%)
- Packaging
- 1G
- Price
- $39.2
- Updated
- 2021/12/16
Chem-Impex
- Product number
- 35562
- Product name
- Hafnium(IV) fluoride
- Purity
- ≥99.9% Metals basis excluding Zr (Zr : 2 - 4%)
- Packaging
- 5G
- Price
- $95
- Updated
- 2021/12/16
Chem-Impex
- Product number
- 35561
- Product name
- Hafnium(IV)fluoride,99.9%Metalsbasis(Hf:65-72%)
- Purity
- 99.9%Metalsbasis(Hf:65-72%)
- Packaging
- 5G
- Price
- $106.4
- Updated
- 2021/12/16
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HAFNIUM FLUORIDE Chemical Properties,Usage,Production
Preparation
Hafnium 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
Chemical Properties
Off-white powder
Physical properties
White monoclinic crystals; refractive index 1.56; density 7.1 g/cm3; sublimes at 970°C.
Uses
Hafnium(IV) fluoride is used as Vacuum deposition.
Production Methods
Hafnium tetrafluoride is prepared by careful thermal decomposition of ammonium fluorohafniate in an oxygen- free atmosphere or by passing anhydrous hydrogen fluoride over hafnium tetrachloride at 300℃. Direct synthesis from the elements is incomplete because the product merely forms a film on the metal. Ammonium fluorohafniate can be prepared by crystallization from an aqueous hydrofluoric acid solution by adding ammonium fluoride.
HAFNIUM FLUORIDE Preparation Products And Raw materials
Raw materials
Preparation Products
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