21023-20-1

21023-20-1 - Names and Identifiers

Name	Tristrimethylsilylhydroxylamine
Synonyms	Tristrimethylsilylhydroxylamine Tris(trimethylsilyl)hydroxylamine N,N,O Tris trimethyls ilylhydroxylamine N,N,O-Tris(trimethylsilyl)hydroxylamine N,N,O-TRIS(TRIMETHYLSILYL)HYDROXYLAMINE O-Trimethylsiloxy-N,N-bis(trimethylsilyl)amine dimethyl-[trimethylsilyl(trimethylsilyloxy)amino]silyl]methane 2,2,5,5-Tetramethyl-4-(trimethylsilyl)-3-oxa-4-aza-2,5-disilahexane 1,1,1-trimethyl-N-(trimethylsilyl)-N-[(trimethylsilyl)oxy]silanamine Silanamine, 1,1,1-trimethyl-N-(trimethylsilyl)-N-[(trimethylsilyl)oxy]-
CAS	21023-20-1
InChI	InChI=1/C9H27NOSi3/c1-12(2,3)10(13(4,5)6)11-14(7,8)9/h1-9H3

21023-20-1 - Physico-chemical Properties

Molecular Formula	C9H27NOSi3
Molar Mass	249.57
Density	0.86
Melting Point	-36 °C
Boling Point	128 °C / 97mmHg
Flash Point	79.2°C
Vapor Presure	0.226mmHg at 25°C
Appearance	clear liquid
Color	Colorless to Almost colorless
pKa	7.19±0.70(Predicted)
Storage Condition	Refrigerator
Refractive Index	1.4340-1.4360

21023-20-1 - Risk and Safety

Risk Codes	R10 - Flammable R34 - Causes burns
Safety Description	S16 - Keep away from sources of ignition. S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S36/37/39 - Wear suitable protective clothing, gloves and eye/face protection.
UN IDs	2924
Hazard Class	8
Packing Group	III

21023-20-1 - Introduction

Also known as HMDS(Hexamethyldisilazane), it is an organosilicon compound. The following is an introduction to its nature, use, preparation and safety information:

Nature:
HMDS is a colorless liquid with a pungent odor. Its chemical formula is C6H19NSi2 and its relative molecular mass is 161.4g/mol. It has low surface tension, low viscosity and high volatility.

Use:
HMDS is widely used in chemical synthesis and materials science. The main uses are as follows:
1. As an organosilicon reagent, it is used to introduce methyl Silicon groups in organic chemical synthesis.
2. As a surface treatment agent, it can be used to improve the wettability and adhesion of the surface of the material.
3. Used as a polymer additive to improve the heat resistance, weather resistance and mechanical properties of the polymer.
4. In the semiconductor industry, as a stripping agent and corrosion inhibitor.

Method:
The preparation of HMDS can be carried out by the following reactions:
(CH3)3SiNH2 (CH3)3SiCl → (CH3)3SiNSi(CH3)3 HCl

Safety Information:
HMDS is irritating, and the following safety precautions should be paid attention to when using HMDS:
1. Do not inhale, chew or swallow, avoid contact with skin and eyes.
2. Wear protective gloves, glasses and masks when using.
3. Use in a well-ventilated place, away from fire sources, and avoid inhaling its vapor.
4. In case of contact, rinse immediately with plenty of water. In case of discomfort, seek medical help as soon as possible.

Please note that the above information is for reference only. Please refer to the relevant safety data sheet and operating specifications before use.

Last Update：2024-04-10 22:29:15