Synonym: Tris(butylcyclopentadienyl)yttrium(III), Y(n-BuCp)3

CAS Number 312739-77-8 | MDL Number MFCD00145473 

Y(n-BuCp)3-Chemical-Structure (1)

Product codeY9778
CAS number312739-77-8
Assay (purity)99%+
Purity methodby titration: %Y=19.0-20.3 (complexometric)
Metal purity99.9%-Y
Molecular weight452.50 g/mo
Appearanceyellow liquid
Flash point57 °C (134.6 °F) – closed cup
NMRconforms to structure
Sensitivityair, moisture
Molecular formulaC27H39Y
Linear formulaY(C5H4CH2(CH2)2CH3)3
Packagingglassware/metal containers/bubblers

Tris(n-butylcyclopentadienyl) yttrium is a precursor applied for the MOCVD growth and an atomic-layer deposition (ALD) of thin films. See links 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 Tris(n-butylcyclopentadienyl)yttrium(III) contact us at

Safety information

Hazardous class4.3(3)
Packing groupII
Signal wordDANGER
Hazard statements
Precautionary statementsP210-P223-P231 + P232-P233-P240-P241-P242-P243-P261-P264-P271-P280-P302 + P352-P303 + P353 + P361-P304 + P340-P305 + P351 + P338-P312-P332 + P313-P334 + P335-P337 + P313-P362-P370 + P378
Transport descriptionOrganometallic substance, liquid, water-reactive, flammable Tris(nbutylcyclopentadienyl) yttrium(III)
In TSCA registryNo (research and development 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 Tris(n-butylcyclopentadienyl)yttrium(III) below please contact customer support at

Lot# 031/389 Lot# 034/017

External identifiers for Y(n-BuCp)3

Pubchem CID16213816
IUPAC Namebutylcyclopentane; yttrium
InchI IdentifierInChI=1S/3C9H13.Y/c3*1-2-3-6-9-7-4-5-8-9;/h3*4-5,7-8H,2-3,6H2,1H3;

Known applications and external links

With Tris(n-butylcyclopentadienyl)yttrium(III) other customers often ask:

Ereztech synthesizes and sells additional Y-compounds.

To purchase Tris(n-butylcyclopentadienyl)yttrium(III) contact us at