HAFNIUM FLUORIDE
Synonym(s):Hafnium tetrafluoride
- CAS NO.：13709-52-9
- Empirical Formula: F4Hf
- Molecular Weight: 254.48
- MDL number: MFCD00016127
- EINECS: 237-258-0
- SAFETY DATA SHEET (SDS)
- Update Date: 2023-10-17 17:11:55
What is HAFNIUM FLUORIDE?
Chemical properties
Off-white powder
Physical properties
White monoclinic crystals; refractive index 1.56; density 7.1 g/cm3; sublimes at 970°C.
The Uses of HAFNIUM FLUORIDE
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.
Properties of HAFNIUM FLUORIDE
| 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) |
Safety information for HAFNIUM FLUORIDE
| Signal word | Danger |
| Pictogram(s) |
 Corrosion Corrosives GHS05  Skull and Crossbones Acute Toxicity GHS06 |
| GHS Hazard Statements |
H315:Skin corrosion/irritation H318:Serious eye damage/eye irritation H331:Acute toxicity,inhalation H335:Specific target organ toxicity, single exposure;Respiratory tract irritation |
| Precautionary Statement Codes |
P280:Wear protective gloves/protective clothing/eye protection/face protection. P302+P352:IF ON SKIN: wash with plenty of soap and water. |
Computed Descriptors for HAFNIUM FLUORIDE
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