52619

Hexamethyldisilazane

for GC derivatization, LiChropur^™, ≥99.0% (GC)

• Synonym(s): HMDS
• Linear Formula: (CH₃)₃SiNHSi(CH₃)₃
• CAS Number: 999-97-3
• Molecular Weight: 161.39
• Beilstein/REAXYS Number: 635752
• EC Number: 213-668-5
• MDL number: MFCD00008259
• UNSPSC Code: 12000000
• PubChem Substance ID: 329757861
• NACRES: NA.22

Properties

• grade: for GC derivatization
• Quality Level: 100
• assay: ≥99.0% (GC)
• form: liquid
• quality: LiChropur^™
• reaction suitability: reagent type: derivatization reagent; reaction type: Silylations
• technique(s): gas chromatography (GC): suitable
• refractive index: n20/D 1.407 (lit.); n20/D 1.408
• bp: 125 °C (lit.)
• SMILES string: C[Si](C)(C)N[Si](C)(C)C
• InChI: 1S/C6H19NSi2/c1-8(2,3)7-9(4,5)6/h7H,1-6H3
• InChI key: FFUAGWLWBBFQJT-UHFFFAOYSA-N

Description

General description

Hexamethyldisilazane (HMDS) is a commercially available, silylating agent, which is used as an alternative for the preparation of silyl ethers from hydroxyl compounds.

Application

Learn more in the Product Information

Hexamethyldisilazane is suitable for the derivatization of alcohols, U-aminobutyric acid, pesticidal carbamates and urea, 3,4-Dihydroxyphenylglycol, 4-hydroxycoumarins, hydroxyfatty acids, n-hydroxy-2-fluorenylacetamide, kerb cycle acid, malonaldehyde, monoglycerides, phenylpyruvic acid, shikimic acid, unsaturated fatty acid esters (or methyl esters), and related compounds.

It may be used as a derivatizing reagent for the analysis of bioamines and their acidic metabolites, phenol, hydroquinone and catechol in urine samples, mixtures of free fatty acids and metal soaps in paint samples using gas chromatography/mass spectrometry (GC/MS).

Suitable for the derivatization of alcohols, Υ-aminobutyric acid, pesticidal carbamates and urea, 3,4-Dihydroxyphenylglycol, 4-hydroxycoumarins, hydroxyfatty acids, n-hydroxy-2-fluorenylacetamide, kerb cycle acid, malonaldehyde, monoglycerides, phenylpyruvic acid, shikimic acid, unsaturated fatty acid esters (or methyl esters), and related compounds.

Features and Benefits

• HMDS is inexpensive and has a relatively low boiling point (124-127 °C).        
• It can be used without solvent but its silylating power can be increased by various (mostly acidic) catalysts.        
• The only reaction byproduct, ammonia, can leave the reaction mixture as the reaction goes to completion.

Other Notes

Important silylating agent

Reagent for 2-hydroxypyrimidine, polytrimethylsilyloxy, trimethylsilyl and trimethylsilyl oximes.

Legal Information

LiChropur is a trademark of Merck KGaA, Darmstadt, Germany

Safety Information

• pictograms: GHS02,GHS06
• signalword: Danger
• hcodes: H225,H302 + H332,H311,H412
• pcodes: P210 - P273 - P280 - P301 + P312 - P303 + P361 + P353 - P304 + P340 + P312
• Hazard Classifications: Acute Tox. 3 Dermal - Acute Tox. 4 Inhalation - Acute Tox. 4 Oral - Aquatic Chronic 3 - Flam. Liq. 2
• Storage Class: 3 - Flammable liquids
• wgk_germany: WGK 2
• flash_point_f: 52.5 °F - closed cup
• flash_point_c: 11.4 °C - closed cup
• ppe: Faceshields, Gloves, Goggles, type ABEK (EN14387) respirator filter