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445541

Sigma-Aldrich

Hafnium(IV) tert-butoxide

99.99% trace metals basis (purity excludes ~2000 ppm zirconium.)

Synonym(s):

Hafnium tetrakis(tert -butoxide), Hafnium(IV) tert -butoxide, Tetra-tert -butoxyhafnium

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About This Item

Linear Formula:
Hf[OC(CH3)3]4
CAS Number:
2172-02-3
Molecular Weight:
470.94
MDL number:
MFCD00070458
UNSPSC Code:
12352103
PubChem Substance ID:
24868190
NACRES:
NA.23

Quality Level

100

Assay

99.99% trace metals basis (purity excludes ~2000 ppm zirconium.)

form

liquid

reaction suitability

core: hafnium

refractive index

n20/D 1.424 (lit.)

bp

90 °C/5 mmHg (lit.)

density

1.166 g/mL at 25 °C (lit.)

SMILES string

CC(C)(C)O[Hf](OC(C)(C)C)(OC(C)(C)C)OC(C)(C)C

InChI

1S/4C4H9O.Hf/c4*1-4(2,3)5;/h4*1-3H3;/q4*-1;+4

InChI key

WZVIPWQGBBCHJP-UHFFFAOYSA-N

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General description

Atomic number of base material: 72 Hafnium

accessory

Product No.
Description
Pricing

Pictograms

FlameExclamation mark
GHS02,GHS07

Signal Word

Warning

Hazard Statements

H226,H315,H319,H335

Hazard Classifications

Eye Irrit. 2 - Flam. Liq. 3 - Skin Irrit. 2 - STOT SE 3

Target Organs

Respiratory system

Storage Class Code

3 - Flammable liquids

WGK

WGK 3

Flash Point(F)

82.4 °F - closed cup

Flash Point(C)

28 °C - closed cup

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

Regulatory Listings

Regulatory Listings are mainly provided for chemical products. Only limited information can be provided here for non-chemical products. No entry means none of the components are listed. It is the user’s obligation to ensure the safe and legal use of the product.

FSL

Group 4: Flammable liquids
Type 2 petroleums
Hazardous rank III
Water insoluble liquid

ISHL Indicated Name

Substances Subject to be Indicated Names

ISHL Notified Names

Substances Subject to be Notified Names

JAN Code

445541-1G:
445541-5G:4548173957975
445541-VAR:
445541-BULK:

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Certificates of Analysis (COA)

Lot/Batch Number
SHBR1951
SHBM6180
SHBJ9109
SHBH7654
SHBF7813V

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Sean W Depner et al.
ACS nano, 8(5), 4678-4688 (2014-04-23)
We demonstrate that the degree of branching of the alkyl (R) chain in a Hf(OR)4 precursor allows for control over the length of HfO2 nanocrystals grown by homocondensation of the metal alkoxide with a metal halide. An extended nonhydrolytic sol-gel

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