Hafnium (IV) tert-butoxide

Synonym: Hafnium tetrakis(tert -butoxide), Hafnium(IV) tert -butoxide, Tetra-tert -butoxyhafnium, HfTB, Hf[OC(Me)3]4

CAS Number 2172-02-3 | MDL Number MFCD00070458 | EC Number 625-479-9

HfTB Chemical-Structure

Product codeHF2023
CAS number2172-02-3
Assay (purity)99%
Metal purity99.9%-Hf (excluding Zr)
Purity methodby integration NMR
NMRconforms to structure
Molecular weight470.94 g/mol
Appearancecolorless to pale yellow liquid
Melting point8°C (46°F)
Boiling point90°C (194°F) @ 5 mmHg
Flash point28°C (82°F) – closed cup
Sensitivityair, moisture
Molecular formulaHfO4C16H36
Linear formulaHf[OC(CH3)3]4
Packagingglassware/metal containers/bubblers

Hafnium (IV) tert-butoxide is a chemical precursor that has been investigated for applicability to plasma enhanced atomic layer deposition. See link below

Ereztech manufactures and sells this product in small and bulk volumes. Glass ampules, bottles or metal ampules or bubblers are available for packaging. For additional analytical information or details about purchasing HF2023 contact us at sales@ereztech.com

Safety information

Hazardous class3
Packing groupIII
Signal wordWARNING
Hazard statementsH226-H315-H319-H335
Precautionary statementsP210-P231-P232-P233-P240-P241-P242-P243-P261-P264-P271-P280-P302+P352-P303 + P353 + P361-P304 + P340-P305 + P351 + P338-P332 + P313-P337 + P313-P362-P370 + P378
Transport descriptionFLAMMABLE LIQUID, N.O.S. (Hafnium(IV) tert-butoxide)
In TSCA registryNo (sold for research and development usage only)

First Aid Measures

General adviceConsult a physician. Show this safety data sheet to the doctor in attendance. Move out of the dangerous area.
Eye contactRinse thoroughly with plenty of water for at least 15 minutes and consult a physician.
Skin contactWash off with soap and plenty of water. Consult a physician.
InhalationIf breathed in, move person into the fresh air. If not breathing, give artificial respiration. Consult a physician.
If swallowedDo NOT induce vomiting. Never give anything by mouth to an unconscious person. Rinse mouth with water. Consult a physician.


Certificates of Analysis (CoA)

If you don’t see the needed lot of Hafnium (IV) tert-butoxide below please contact customer support at sales@ereztech.com

Lot# 015/676 Lot# 015/772 Lot# 015/852/1

External identifiers for HfTB

Pubchem CID9934444
IUPAC Namehafnium(4+); 2-methylpropan-2-olate
InchI IdentifierInChI=1S/4C4H9O.Hf/c4*1-4(2,3)5;/h4*1-3H3;/q4*-1;+4

Known applications and external links

With Hafnium (IV) tert-butoxide other customers often ask:

Ereztech synthesizes and sells additional HF-compounds.

To purchase HF2023 contact us at sales@ereztech.com