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440191

Sigma-Aldrich

Hexaméthyldisilazane

reagent grade, ≥99%

Synonyme(s) :

HMDS

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About This Item

Formule linéaire :
(CH3)3SiNHSi(CH3)3
Numéro CAS:
999-97-3
Poids moléculaire :
161.39
Numéro Beilstein :
635752
Numéro CE :
213-668-5
Numéro MDL:
MFCD00008259
Code UNSPSC :
12352103
ID de substance PubChem :
24867576
Nomenclature NACRES :
NA.23

Qualité

reagent grade

Pureté

≥99%

Forme

liquid

Indice de réfraction

n20/D 1.407 (lit.)

Point d'ébullition

125 °C (lit.)

Chaîne SMILES 

C[Si](C)(C)N[Si](C)(C)C

InChI

1S/C6H19NSi2/c1-8(2,3)7-9(4,5)6/h7H,1-6H3

Clé InChI

FFUAGWLWBBFQJT-UHFFFAOYSA-N

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Description générale

Hexamethyldisilane (HMDS) is a stable and effectivereagent for trimethylsilylation of hydrogen-labile substrates such as alcohols,amines, and carboxylic acids. It is commonly used for the protection of sensitivefunctional groups during chemical synthesis. Owing to its low cost, high vapor pressure, and safety, itis widely used as a precursor in chemical vapor deposition(CVD) reactions.

Application

Hexamethyldisilane (HMDS) can be used:
  • As a silylating agent in the trimethylsilylation of alcohols under nearly neutral reaction conditions.
  • To control the molecular weights of polypeptides during ring-opening polymerization of α-amino acid N-carboxyanhydrides.
  • To fabricate silicon carbonitride thin films by plasma-enhanced CVD.
  • For specimen preparation for scanning electron microscopy and the preparation of trimethylsilyl ethers from hydroxy compounds.

Caractéristiques et avantages

  • High chemicalstability and low molecular weight
  • Nontoxic andcost-effective reagent
  • Ammonia is theonly byproduct generated during silylation
  • Silylationreaction using HDMS is nearly neutral and does not need any precaution

Pictogrammes

FlameSkull and crossbones
GHS02,GHS06

Mention d'avertissement

Danger

Mentions de danger

H225,H302 + H332,H311,H412

Classification des risques

Acute Tox. 3 Dermal - Acute Tox. 4 Inhalation - Acute Tox. 4 Oral - Aquatic Chronic 3 - Flam. Liq. 2

Code de la classe de stockage

3 - Flammable liquids

Classe de danger pour l'eau (WGK)

WGK 2

Point d'éclair (°F)

52.5 °F - closed cup

Point d'éclair (°C)

11.4 °C - closed cup

Équipement de protection individuelle

Faceshields, Gloves, Goggles, type ABEK (EN14387) respirator filter

Certificats d'analyse (COA)

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Rapid and highly efficient trimethylsilylation of alcohols and phenols
with hexamethyldisilazane (HMDS) catalysed by in situ generated I2
using OxoneR /KI or cerium ammonium nitrate (CAN)/KI systems
under mild conditions
Eskandar K, et al.
Journal of Chemical Sciences (Bangalore), 123(5), 703-708 (2011)
F Braet et al.
Journal of microscopy, 186(Pt 1), 84-87 (1997-04-01)
Critical point drying (CPD) is a common method of drying biological specimens for scanning electron microscopy (SEM). Drying by evaporation of hexamethyldisilazane (HMDS) has been described as a good alternative. This method, however, is infrequently used. Therefore, we reassessed HMDS
Judith J de Vries et al.
International journal of molecular sciences, 21(19) (2020-10-01)
Subjects with diabetes mellitus (DM) have an increased risk of arterial thrombosis, to which changes in clot structure and mechanics may contribute. Another contributing factor might be an increased formation of neutrophil extracellular traps (NETs) in DM. NETs are mainly
Teresa Dean et al.
Biomaterials science, 8(11), 3078-3094 (2020-04-30)
Cancer associated fibroblasts (CAFs) are a major cellular component of the tumour stroma and have been shown to promote tumour cell invasion and disease progression. CAF-cancer cell interactions are bi-directional and occur via both soluble factor dependent and extracellular matrix
Clyde Savio Pinto et al.
Scientific reports, 9(1), 12191-12191 (2019-08-23)
Apical projections are integral functional units of epithelial cells. Microvilli and stereocilia are cylindrical apical projections that are formed of bundled actin. Microridges on the other hand, extend laterally, forming labyrinthine patterns on surfaces of various kinds of squamous epithelial
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