Tantalum(V) butoxide

Synonym: Pentabutoxytantalum, Pentakis(butyloxy) tantalum(V), Tantalum pentabutanolate, Tantalum penta-n-butoxide

CAS Number 51094-78-1 | MDL Number MFCD00078035 | EC Number 256-962-9

Pentakis(butyloxy) tantalum(V)-Chemical-Structure

Product codeTA4781
CAS number51094-78-1
Assay (purity)98%+
Purity methodby gravimetric assay (after oxygen combustion): %Ta=32.3-34.0 (after ignition to oxide)
Metal purity99.99%+-Ta
Molecular weight546.52
Appearancepale yellow liquid
Boiling point217 °C (422.6 °F) @ 0.15 mm Hg
Flash point40.0 °C (104 °F) – closed cup
Molecular formulaC20H45O5Ta
Linear formulaTa(OCH2CH2CH2CH3)5
Packagingglassware/metal containers/bubblers

Tantalum(V) butoxide is for the synthesis of Tantalum oxide nanoparticles . Tantalum alkoxides are also used as starting materials for tantalum oxides for dielectrics.  This product is used as a precursor for the sol-gel deposition of NaTaO3 thin films and for the sol-gel deposition of Tantalum doped TiO2. It is also used in pharmaceutical industry. Synthesis of Ta(OCH2CH2CH2CH3)5 is reported (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 Tantalum(V) butoxide contact us at sales@ereztech.com

Safety information

Hazardous class3
Packing groupIII
Signal wordWARNING
Hazard statements
Precautionary statementsP210-P231 + P232-P233-P240-P241-P242-P243-P261-P264-P271-P280-P302 + P352-P303 + P361 + P353-P304 + P340-P305 + P351 + P338-P312-P332 + P337 + P313-P362-P370 + P378
Transport descriptionCorrosive liquids, flammable, n.o.s. (Tantalum(V) n-butoxide)
In TSCA registryYes

First Aid Measures

General adviceConsult a physician. Show this safety data sheet to the doctor in attendance. Move out of 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 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 Tantalum(V) butoxide CAS 51094-78-1 below please contact customer support at sales@ereztech.com

Lot# 021/191 Lot# 023/274 Lot# 023/275 Lot# 029/196 Lot# 029/197 Lot# 026/118 Lot# 031/414

External identifiers for Pentabutoxytantalum 

Pubchem CID170974
IUPAC Namebutan-1-olate; tantalum(5+)
InchI IdentifierInChI=1S/5C4H9O.Ta/c5*1-2-3-4-5;/h5*2-4H2,1H3;/q5*-1;+5

Known applications and external links

With Bis(t-butylamino)silane other customers often ask:

Ereztech synthesizes and sells additional Ta-compounds.

To purchase Tantalum(V) butoxide contact us at sales@ereztech.com