Synonym: Tris(dimethylamino)antimony(III), Tridimethylaminoantimony, Tris dimethylamino antimony, TDMASb, Sb(NMe2)3

CAS Number 7289-92-1 | MDL Number MFCD00269812  

TDMASb Chemical structure

Product codeSB9921
CAS number7289-92-1
Assay (purity)98%+
Metal purity99.99% – Sb
Purity methodby integration NMR
NMR H1conforms to structure
Molecular weight253.99 g/mol
Boiling point32-34 °C (90-93 °F) @ 0.60 hPa (0.45 mmHg)
Appearancecolorless to yellow liquid
Sensitivityair, moisture, light, heat
Molecular formulaC6H18N3Sb
Linear formula((CH3)2N)3Sb
Packagingglassware/metal containers/bubblers

Tris(dimethylamido)antimony(III) was proposed as a potential precursor for the growth of Sb2Te3 films by MOCVD, as it has sufficient volatility for this purpose. Also, this product was applied as Sb source for the growth of InGaAsSb layers nearly lattice-matched to InP by MO MBE. TDMASb appeared to be useful not only as an Sb precursor but also as an additive reducing incorporation of C into the film from group-III MO sources, according to SIMS measurements. Sb(NMe2)3, combined with trimethylindium InMe3 as In source, was applied as an antimony precursor for the growth of epitaxial layers of InSb on p−InSb substrates by MOCVD. TDMASb (combined with TeiPr2 as Te source) was applied as a precursor for the growth of TDMASb on SiN by CVD at substrate temperature 350°C, press 3 Torr, run time 30min, 50 rpm. See links below

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Safety information

Hazardous class4.3(3)
Packing groupI
Signal wordDANGER
Hazard statementsH224-H260-H302-H314-H318-H332-H401-H414
Precautionary statementsP210-P223-P231 + P232-P233-P240-P241-P242-P243-P260-P264-P270-P271-P273-P280P301 + P312-P301 + P330 + P331-P303 + P361 + P353-P304 + P340-P305 + P351 + P338-P310-P303-P334 + P335-P363-P370 + P378-P391
Transport descriptionOrganometallic substance, liquid, water-reactive, flammable (Tris(dimethylamido) antimony(III)
In TSCA registryNo (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 Tris(dimethylamido)antimony(III) below please contact customer support at

Lot# 007/1250 Lot# 007/1165

External identifiers for TDMASb

Pubchem CID4169194
IUPAC NameN-[bis(dimethylamino)stibanyl]-N-methylmethanamine
InchI IdentifierInChI=1S/3C2H6N.Sb/c3*1-3-2;/h3*1-2H3;/q3*-1;+3

Known applications and external links

With Tris(dimethylamido)antimony(III) oxide other customers often ask:

Ereztech synthesizes and sells additional SB-compounds.

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