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Sigma-Aldrich

Hafnium

powder, −325 mesh, 99.5% trace metals basis (purity excludes ~2% zirconium), contains 1:10 pentanol to water solution as stabilizer

Synonym(s):

Celtium, Hafnium element

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About This Item

Empirical Formula (Hill Notation):
Hf
CAS Number:
7440-58-6
Molecular Weight:
178.49
EC Number:
231-166-4
MDL number:
MFCD00011032
UNSPSC Code:
12352300
PubChem Substance ID:
24856157
NACRES:
NA.23

Assay

99.5% trace metals basis (purity excludes ~2% zirconium)

form

powder

contains

1:10 pentanol to water solution as stabilizer

resistivity

29.6 μΩ-cm, 0°C

particle size

−325 mesh

bp

4602 °C (lit.)

mp

2227 °C (lit.)

density

13.3 g/cm3 (lit.)

SMILES string

[Hf]

InChI

1S/Hf

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Pictograms

Flame
GHS02

Signal Word

Danger

Hazard Statements

H228,H250

Hazard Classifications

Flam. Sol. 1 - Pyr. Sol. 1

Storage Class Code

4.2 - Pyrophoric and self-heating hazardous materials

WGK

WGK 3

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Regulatory Information

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Certificates of Analysis (COA)

Lot/Batch Number
MKCK9646
MKBX3998V
MKBV7523V
MKBR9046V
MKBQ2316V

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José Luis Olivares-Romero et al.
Journal of the American Chemical Society, 134(12), 5440-5443 (2012-03-17)
Asymmetric epoxidation of allylic and homoallylic amine derivatives catalyzed by Hf(IV)-bishydroxamic acid complexes is described. Under similar conditions, aldimine and ketimine produced oxaziridines. The sulfonyl group is demonstrated to be an effective directing group for these transformations.
Tingting Zhao et al.
Journal of biomedical materials research. Part B, Applied biomaterials, 100(3), 646-659 (2011-11-29)
Hafnium ion implantation was applied to NiTi alloy to suppress Ni ion release and enhance osteoblast-material interactions and hemocompatibility. The auger electron spectroscopy, x-ray photoelectron spectroscopy, and atomic force microscope results showed that a composite TiO(2)/HfO(2) nanofilm with increased surface
Suresh Kumar Raman Pillai et al.
ACS applied materials & interfaces, 4(12), 7047-7054 (2012-12-01)
The large-scale application of semiconducting single-walled carbon nanotubes (s-SWCNTs) for printed electronics requires scalable, repeateable, as well as noncontaminating assembly techniques. Previously explored nanotube deposition methods include serial methods such as inkjet printing and parallel methods such as spin-coating with
Célia Lourenço et al.
The journal of physical chemistry. A, 116(51), 12399-12405 (2012-11-29)
Fourier transform ion cyclotron resonance mass spectrometry was used to characterize the gas-phase reactivity of Hf dipositive ions, Hf(2+)and HfO(2+), toward several oxidants: thermodynamically facile O-atom donor N(2)O, ineffective donor CO, and intermediate donors O(2), CO(2), NO, and CH(2)O. The
Daqin Chen et al.
Chemical communications (Cambridge, England), 48(86), 10630-10632 (2012-09-27)
Novel Yb/Er(Tm):Na(3)MF(7) (M = Zr, Hf) nanocrystals with intrinsic single-band upconversion emission, in contrast to the routine lanthanide-doped fluoride nanocrystals which show typical multi-band upconversion emissions, are reported for the first time. Specifically, the red upconversion intensity of the Yb/Er:Na(3)ZrF(7)
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