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H11602

Sigma-Aldrich

Hexamethylphosphoramide

99%

Synonym(s):

HMPA, Hexamethylphosphoric acid triamide, Tris(dimethylamino)phosphine oxide

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About This Item

Linear Formula:
[(CH3)2N]3PO
CAS Number:
680-31-9
Molecular Weight:
179.20
Beilstein:
1099903
EC Number:
211-653-8
MDL number:
MFCD00008303
UNSPSC Code:
12352111
PubChem Substance ID:
24895433
NACRES:
NA.22

vapor density

6.18 (vs air)

Quality Level

200

vapor pressure

0.07 mmHg ( 25 °C)

Assay

99%

refractive index

n20/D 1.459 (lit.)

bp

230-232 °C/740 mmHg (lit.)

mp

7 °C (lit.)

density

1.03 g/mL at 25 °C (lit.)

SMILES string

CN(C)P(=O)(N(C)C)N(C)C

InChI

1S/C6H18N3OP/c1-7(2)11(10,8(3)4)9(5)6/h1-6H3

InChI key

GNOIPBMMFNIUFM-UHFFFAOYSA-N

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General description

Hexamethylphosphoramide is a polar aprotic solvent.

Application

Hexamethylphosphoramide can be used as a solvent:
  • For the conversion of carboxylate salt into esters by reacting with alkyl halides.
  • To synthesize aryl thioethers via nucleophilic displacement of unactivated aryl halides by thiolate ions.
  • To synthesize polyazomethines (PAZs) from dialdehyde and diamine via high-temperature solution polycondensation.

Pictograms

CorrosionHealth hazard
GHS05,GHS08

Signal Word

Danger

Hazard Statements

H314 - H340 - H350

Hazard Classifications

Carc. 1B - Eye Dam. 1 - Muta. 1B - Skin Corr. 1C

Storage Class Code

6.1C - Combustible, acute toxic Cat.3 / toxic compounds or compounds which causing chronic effects

WGK

WGK 3

Flash Point(F)

291.2 °F - closed cup

Flash Point(C)

144 °C - closed cup

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

Regulatory Listings

Regulatory Listings are mainly provided for chemical products. Only limited information can be provided here for non-chemical products. No entry means none of the components are listed. It is the user’s obligation to ensure the safe and legal use of the product.

EU REACH Annex XVII (Restriction List)

CAS No.

Certificates of Analysis (COA)

Search for Certificates of Analysis (COA) by entering the products Lot/Batch Number. Lot and Batch Numbers can be found on a product’s label following the words ‘Lot’ or ‘Batch’.

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Nucleophilic aromatic substitution reactions of unactivated aryl halides with thiolate ions in hexamethylphosphoramide.
Cogolli P, et al.
The Journal of Organic Chemistry, 44(15), 2642-2646 (1979)
Optical and structural study of thin film of polyazomethine with triphenylamine unit prepared via spin-coating method.
Palewicz M, et al.
Polymer Bull., 66(1), 65-76 (2011)
Controlled/?Living? Reverse Atom Transfer Radical Polymerization of a Monocyclic Olefin, Methyl 1-Cyclobutenecarboxylate.
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Normant H.
Angewandte Chemie (International Edition in English), 6(12), 1046-1067 (1967)
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