Synonym: BTBMW, TBIDMW, ((CH3)3 CN)2W(N(CH3)2)2

CAS Number 406462-43-9 | MDL Number MFCD07369712 | EC Number 624-177-4

BTBMW Chemical Structure

Product codeW2439
CAS number406462-43-9
Assay (purity)98%+
Purity methodby integration NMR H1
Metal purity99.99%-W
NMRconforms to structure
Molecular weight414.23 g/mol
Appearancelight yellow to dark orange liquid
Boiling point81 °C/0.02 mmHg(lit.)
Sensitivityair, moisture
Molecular formulaC12H30N4W
Linear formula((CH3)3CN)2W(N(CH3)2)2
Packagingglassware/metal containers/bubblers

Bis(tert-butylimido)bis(dimethylamido)tungsten is used for preparing of thin films by plasma-assisted atomic layer deposition (ALD). 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 W2439 contact us at

Safety information

Hazardous class4.3(3)
Packing groupI
Signal wordDANGER
Hazard statementsH225-H260-H314-H318
Precautionary statementsP210-P223-P231 + P232-P233-P240-P241-P242-P243-P260-P264-P280-P301 + P330 + P331-P303 + P361 + P353-P304 + P340-P305 + P351 + P338-P310-P334 + P335-P370 + P378-P402 + P404-P403 + P235-P405-P422-P501
Transport descriptionORGANOMETALLIC SUBSTANCE, LIQUID, WATER-REACTIVE, FLAMMABLE (Bis(tert-butylimino) bis(dimethylamino) tungsten(VI))
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 Bis(tert-butylimino)bis(dimethylamino)tungsten(VI) below please contact customer support at sales@ereztech.

Lot# 031/358 Lot# 031/375 Lot# 031/404 Lot# 031/415

External identifiers for BTBMW

Pubchem CID16217328
IUPAC Namebis(tert-butylimino)tungsten;dimethylazanide
InchI IdentifierInChI=1S/2C4H9N.2C2H6N.W/c2*1-4(2,3)5;2*1-3-2;/h2*1-3H3;2*1-2H3;/q;;2*-1;

Known applications and external links

With Bis(tert-butylimino)bis(dimethylamino)tungsten(VI) other customers often ask:

Ereztech synthesizes and sells additional W-compounds.
To purchase W2439 contact us at