Hafnium 2,4-pentanedionate

Synonym: Hafnium Acetylacetonate, Tetrakis(acetylacetonato)hafnium(IV), Tetrakis(2, 4-pentanedionato)hafnium(IV), Hafnium tetrakis[(2E)-4-oxo-2-penten-2-olate], Hf(acac)4

CAS Number 17475-67-1 | MDL Number MFCD00044997 

Hafnium Acetylacetonate

Product codeHF5671
CAS number17475-67-1
Assay (purity)97.5%+
Metal purity99.5% – Hf
Purity methodby elemental analysis: % C = 40.7 – 42.8; % H = 4.8 – 5.0%
NMR H1conforms to structure
Molecular weight574.93 g/mol
Appearancewhite to off-white powder
Melting point193 °C (379.4 °F)
Boiling point82 °C (179.6 °F) @ 1 mmHg
Sensitivityair, moisture
Molecular formulaHfO8C20H28
Linear formulaHf(CH3COCHCOCH3)4
Packagingglassware/metal containers/bubblers

Hafnium 2,4-pentanedionate can be used for CVD of HfO2, but requires high vaporization temperatures (~ 200°C) for sufficient evaporation. Also, a complete study of the catalytic activity of hafnium acetylacetonate catalysts in PBT synthesis was conducted in order to investigate any improvement in the process and/or in the properties of the final polymer with respect to the industrially used titanium tetrabutoxide (TBT) catalyst. Small scale polymerization and subsequent scale-up in higher capacity reactors showed that TBT-Hf(acac)4 mixed catalyst was more active with respect to TBT as a single catalyst. Decreases in polymerization time and THF formation were also observed, which in turn can improve the productivity of the whole process. Furthermore, for similar values of molecular weight, a lower melt viscosity (and thus better processability and crystallizability) was obtained by using a mixed catalyst. 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 HF5671 contact us at sales@ereztech.com

Safety information

UNNot regulated
Hazardous classNot regulated
Packing groupNot regulated
Signal wordWARNING
Hazard statementsH315-H319-H335
Precautionary statementsP261-P264-P271-P280-P302+P352-P304+P340-P305+P351+P338-P332+P313-P362
Transport descriptionNot applicable
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 2,4-pentanedionate below please contact customer support at sales@ereztech.com

Lot# 015/783 Lot# 015/804 Lot# 019/280 Lot# 040/003

External identifiers for Hf(acac)4

Pubchem CID21953595
IUPAC Namehafnium(4+); (Z)-4-oxopent-2-en-2-olate
InchI IdentifierInChI=1S/4C5H8O2.Hf/c4*1-4(6)3-5(2)7;/h4*3,6H,1-2H3;/q;;;;+4/p-4/b4*4-3-;

Known applications and external links

With Chlorotriethylgermane other customers often ask:

Ereztech synthesizes and sells additional HF-compounds.

To purchase HF5671 contact us at sales@ereztech.com