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hexamethyldisilazane

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Origin: China

Cas No: 999-97-3

Specification: 99%min

Min order Quantity: 1 /kg

Supply Ability: 80 mt/month

Lead time: 7 days for OEM, 3 days for ready goods

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CAS No.: 999-97-3 Formula: C6H19NSi2 Molecular Weight: 161.39300

Description

Bis(trimethylsilyl)amine (also known as hexamethyldisilazane, or HMDS) is an organosilicon compound with the molecular formula [(CH3)3Si]2NH. The molecule is a derivative of ammonia with trimethylsilyl groups in place of two hydrogen atoms. This colorless liquid is a reagent and a precursor to bases that are popular in organic synthesis and organometallic chemistry.

Basic Info

Chemical Name	hexamethyldisilazane
Synonyms	SILAZANE HMN; HMDS; 1,1,1,3,3,3-hexa-methyldisilazane; Hexamethyldisilazane; Silanamine, 1,1,1-trimethyl-N-(trimethylsilyl)-; hexamethylsilazane; HEXAMETHYLISILAZNE; HMDZ;
CAS No.	999-97-3
Molecular Formula	C6H19NSi2
Molecular Weight	161.39300
PSA	12.03000
LogP	2.63670

Properties

Appearance & Physical State	Clear liquid
Density	0.765
Boiling Point	125ºC
Melting Point	-78ºC
Flash Point	20ºC
Refractive Index	1.4069-1.4089
Water Solubility	REACTS
Storage Condition	2-8ºC

Safety Info

RTECS	JM9230000
Hazard Class	3
Safety Statements	S16-S26-S36/37/39-S45
HS Code	2929909090
WGK Germany	2
Packing Group	II
RIDADR	UN 3286
Risk Statements	R11; R20/21/22; R34
Hazard Codes	C
Hazard Declaration	H225; H302 + H332; H311; H412
Caution Statement	P210; P261; P273; P280; P302 + P352 + P312; P304 + P340 + P312
Symbol	GHS02, GHS06
Signal Word	Danger

Synthesis Route

Dilithium N,N'-bis(trimethylsilyl)hydrazide tetramer→1,2-bis(trimethylsilyl)hydrazine+tetrakis(trimethylsilyl)hydrazine cation radical
N-bromo-bis(trimethylsilyl)amine+triethyl(benzyloxy)stannane→hexamethyldisiloxane+Hydrobenzamide
Tris(trimethylsilyl)tetrazen→Azidotrimethylsilane+1,1,2-tris(trimethylsilyl)hydrazine

GC Analysis

Column type	Active phase	Temperature (°C)	Retention Index (I)	Temperature Control Method
Packed	Apolane	130.	686.	isothermal
Capillary	Polydimethyl siloxanes	-	717.	custom temperature program

Precursor

Tetrahydrofuran
bis(trimethylsilyl) sulfate
bromo(trimethyl)silane
isocyano(trimethyl)silane

Downstream Product

(3-λ<sup>1</sup>-silanyloxy-5-trimethylsilyloxyphenoxy)silicon
5-fluoro-N-trimethylsilyl-2-trimethylsilyloxypyrimidin-4-amine
trimethyl-(2-nitrophenoxy)silane
(5,5-dimethyl-1,3,2-dioxaphosphinan-2-yl)oxy-trimethylsilane

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