Hexamethyldisilazane

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Hexamethyldisilazane

Product Name: Hexamethyldisilazane
CAS No.: 999-97-3
Chemical Name: Hexamethyldisilazane
Synonyms: HMDS;BIS(TRIMETHYLSILYL)AMINE;1,1,1,3,3,3-HEXAMETHYLDISILAZANE;HEXAMETHYLDISILYLAMINE;HMDZ;hexamethylsilazane;((CH3)3Si)2NH;hexamethyldisilazane(hmds);1,1,1,3,3,3-Hexamithyl disilazane;1,1,1-Trimethyl-N-(trimethylsilyl)silanamine
CBNumber: CB9105784
Molecular Formula: C6H19NSi2
Formula Weight: 161.39
MOL File: 999-97-3.mol

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Hexamethyldisilazane Property

Melting point:: -78 °C
Boiling point:: 125 °C (lit.)
Density: 0.774 g/mL at 25 °C(lit.)
vapor density: 4.6 (vs air)
vapor pressure: 20 hPa (20 °C)
refractive index: n20/D 1.407(lit.)
Flash point:: 57.2 °F
storage temp.: Store below +30°C.
solubility: Miscible with acetone, benzene, ethyl ether, heptane and perchloroethylene.
pka: 30(at 25℃)
form: Liquid
color: Colorless
Specific Gravity: 0.774
Odor: Ammonia odour
PH Range: 8.5
explosive limit: 0.8-25.9%(V)
Water Solubility: REACTS
Sensitive: Moisture Sensitive
Hydrolytic Sensitivity: 7: reacts slowly with moisture/water
Merck: 14,4689
BRN: 635752
InChIKey: FFUAGWLWBBFQJT-UHFFFAOYSA-N
LogP: 0.23-1.19 at 20-25℃
CAS DataBase Reference: 999-97-3(CAS DataBase Reference)
NIST Chemistry Reference: Silanamine, 1,1,1-trimethyl-N-(trimethylsilyl)-(999-97-3)
EPA Substance Registry System: Hexamethyldisilazane (999-97-3)

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Safety

Hazard Codes: F,C,Xn
Risk Statements: 11-20/21/22-34-52/53
Safety Statements: 16-26-36/37/39-45-61
RIDADR: UN 3286 3/PG 2
WGK Germany: 2
RTECS: JM9230000
F: 21
Autoignition Temperature: 325 °C
Hazard Note: Flammable
TSCA: Yes
HS Code: 2931 90 00
HazardClass: 3
PackingGroup: II
Hazardous Substances Data: 999-97-3(Hazardous Substances Data)
Toxicity: LDLO i.p. in mice: 650 mg/kg (Petrarch Systems Inc. Product Information Sheets)

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Hazard and Precautionary Statements (GHS)

Symbol(GHS)

Signal word

Danger

Hazard statements

H225Highly Flammable liquid and vapour

H311Toxic in contact with skin

H412Harmful to aquatic life with long lasting effects

Precautionary statements

P210Keep away from heat/sparks/open flames/hot surfaces. — No smoking.

P273Avoid release to the environment.

P280Wear protective gloves/protective clothing/eye protection/face protection.

P301+P312IF SWALLOWED: call a POISON CENTER or doctor/physician IF you feel unwell.

P303+P361+P353IF ON SKIN (or hair): Remove/Take off Immediately all contaminated clothing. Rinse SKIN with water/shower.

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N-Bromosuccinimide Price

Sigma-Aldrich

Product number: 86944
Product name: Hexamethyldisilazane
Purity: produced by Wacker Chemie AG, Burghausen, Germany, ≥97.0% (GC)
Packaging: 500G
Price: $150
Updated: 2024/03/01

Sigma-Aldrich

Product number: 86944
Product name: Hexamethyldisilazane
Purity: produced by Wacker Chemie AG, Burghausen, Germany, ≥97.0% (GC)
Packaging: 5KG
Price: $732
Updated: 2024/03/01

Sigma-Aldrich

Product number: 86944
Product name: Hexamethyldisilazane
Purity: produced by Wacker Chemie AG, Burghausen, Germany, ≥97.0% (GC)
Packaging: 20KG
Price: $2540
Updated: 2024/03/01

Sigma-Aldrich

Product number: 8.04324
Product name: 1,1,1,3,3,3-Hexamethyldisilazane
Purity: for synthesis
Packaging: 50mL
Price: $39.6
Updated: 2024/03/01

Sigma-Aldrich

Product number: 8.04324
Product name: 1,1,1,3,3,3-Hexamethyldisilazane
Purity: for synthesis
Packaging: 250ML
Price: $111
Updated: 2024/03/01

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Hexamethyldisilazane Chemical Properties,Usage,Production

Description

Hexamethyldisilazane is a bulk organo silicon compound, being a quite useful silanizing agent. It is a reagent for the preparation of trimethylsilyl derivatives. It can also be used to dehydrate cells of biomaterials for scanning electron microscopy (SEM). Moreover, it is an adhesion promoter for photoresist in photolithography, and is also useful in the pyrolysis-gas chromatography-mass spectrometry to enhance the detectability of compounds with polar functional groups.

Chemical Properties

Hexamethyldisilazane, also known as HMDS, is an important organosilicon compound, a colorless and transparent liquid. It is readily hydrolyzed and gives off NH3 to produce hexamethyldisilyl ether. In the presence of a catalyst, it reacts with alcohols or phenols to produce trimethylalkoxysilane or trimethylaroxysilane. Reacts with anhydrous hydrogen chloride, releasing NH3 or NH4Cl, to produce trimethylchlorosilane.

Physical properties

Colorless transparent and easy flowing liquid. Boiling point 125℃, relative density 0.76 (20/4℃). Soluble in organic solvents, it will be rapidly hydrolyzed in contact with air to form trimethylsilanol and hexamethyldisilyl ether.

Uses

Hexamethyldisilazane mainly used as methyl silane alkylation (such as amikacin, penicillin, cephalosporins and kinds of penicillin derivatives), hydroxyl protectants of antibiotics. It is used as surface treatment agent of diatomite, white carbon black, titanium and blond additives of photoresist in the semiconductor industry. It is used as treatment agent of tearing strength resistance. It is used as a solvent in organic synthesis and organometallic chemistry. It is used as an adhesion promoter for photoresist in photolithography. it is used for the preparation of trimethylsilyl ethers from hydroxy compounds. It is used as an alternative to critical point drying during sample preparation in electron microscopy. It is added to analyte to get silylated diagnostic products during pyrolysis in gas chromatography- mass spectrometry.

Definition

ChEBI: Hexamethyldisilazane is an N-silyl compound obtained from ammonia by replacement of two of the hydrogens with trimethylsilyl groups. Hexamethyldisilazane is a derivatisation agent used in gas chromatography mass spectrometry applications. It has a role as a chromatographic reagent. It derives from a hydride of an ammonia.

Reactions

Hexamethyldisilazane(HMDS) is an extremely versatile and strong silylating agent. It is primarily used for the protection of sensitive functional groups during chemical synthesis.One of the advantages of Hexamethyldisilazane over chlorosilanes is that no base is needed as a hydrochloric acid acceptor. It produces ammonia which escapes easily from the reaction mixture during silylation.

General Description

Hexamethyldisilazane appears as a liquid. May be toxic by ingestion. Irritates skin and eyes. Vapors are heavier than air. May emit highly toxic nitrogen oxide fumes when heated to decomposition. Used to deactivate chromatography support materials and to promote adhesion of photoresists in the electronics industry.

Air & Water Reactions

Highly flammable. Moisture sensitive.

Reactivity Profile

Hexamethyldisilazane reacts with many carbonyl containing organic compounds to generate gaseous ammonia. May be incompatible with isocyanates, halogenated organics, peroxides, phenols (acidic), epoxides, anhydrides, and acid halides. Flammable gaseous hydrogen may be generated in combination with strong reducing agents, such as hydrides.

Hazard

Flammable, moderate fire risk.

Health Hazard

Inhalation or contact with material may irritate or burn skin and eyes. Fire may produce irritating, corrosive and/or toxic gases. Vapors may cause dizziness or suffocation. Runoff from fire control or dilution water may cause pollution.

Purification Methods

A possible impurity is Me3SiCl. Wash it well with pet ether and fractionate it through a vacuum jacketed column packed with Helipac using a reflux ratio of 10:1. [Langer et al. J Org Chem 23 50 1958, Beilstein 4 IV 4014.]

References

Deng, Xiang. "Hexamethyldisilazane." Synlett 2011.06(2011):881-882. Chiavari, G, D. Fabbri, and S. Prati. "Gas chromatographic-mass spectrometric analysis of products arising from pyrolysis of amino acids in the presence of hexamethyldisilazane." Journal of Chromatography A922.1–2(2001):235-241.
Nation, J. L. "A new method using hexamethyldisilazane for preparation of soft insect tissues for scanning electron microscopy." Stain Technology 58.6(1983):347-51.
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Hexamethyldisilazane Preparation Products And Raw materials

Raw materials

4-Chlorobenzaldehyde Chlorotrimethylsilane Diethyl ether Ammonium chloride

Preparation Products

O,O'-BIS(TRIMETHYLSILYL)-5-FLUOROURACIL beta-Methyl vinyl phosphate (MAP) 6-BROMO-1H-PYRROLO[2,3-B]PYRIDINE Lithium bis(trimethylsilyl)amide Tegafur (2R)-2-[(4-Ethyl-2,3-dioxopiperazinyl)carbonylamino]-2-phenylacetic acid 3-METHOXYBENZAMIDINE HYDROCHLORIDE (2R)-2-[(4-Ethyl-2,3-dioxopiperazinyl)carbonylamino]-2-(4-hydroxyphenyl)acetic acid 6-CHLORO-1H-PYRROLO[2,3-B]PYRIDINE Sodium bis(trimethylsilyl)amide

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View Lastest Price from Hexamethyldisilazane manufacturers

Jinan Finer Chemical Co., Ltd

Product: Hexamethyldisilazane 999-97-3
Price: US $0.00/Kg/Drum
Min. Order: 1KG
Purity: 99%
Supply Ability: 2000mt/year
Release date: 2021-08-03

Ningxia Jinhua Chemical Co.,Ltd

Product: Hexamethyldisilazane(HMDS) 999-97-3
Price: US $0.00/Kg/Drum
Min. Order: 25Kg/Drum
Purity: 99%
Supply Ability: 200 tons
Release date: 2020-08-07

Hebei Duling International Trade Co. LTD

Product: Hexamethyldisilazane 999-97-3
Price: US $100.00/kg
Min. Order: 1kg
Purity: 0.99
Supply Ability: 100 tons
Release date: 2022-09-23

999-97-3, HexamethyldisilazaneRelated Search:

llthium(hexamethyldisilazane),LITHIUM HEXAMETHYLDISILAZANE,HEXAMETHYLDISILAZANE LITHIUM SALT,1,1,1,3,3,3-HEXAMETHYLDISILAZANE LITHIUM SALT N-Methyl-2-pyrrolidone Heptamethyldisilazane Hexamethyldisilane Hexamethyldisiloxane Trimethyl borate Sodium bis(trimethylsilyl)amide 1,3-Bis(trimethylsilyl)urea N-(Trimethylsilyl)acetamide Heptamethyldisilazane POLY(METHYLSILSESQUIOXANE) 2,2,4,4,6,6-Hexamethylcyclotrisilazane Octamethylcyclotetrasilazane Potassium bis(trimethylsilyl)amide 3-Glycidoxypropyltrimethoxysilane 3-Aminopropyltriethoxysilane Hexamethylcyclotrisiloxane 1,3,5-triazine-2,4,6-triyltrinitrilohexamethanol

((CH3)3Si)2NH

1,1,1,3,3,3-hexamethyl-disilazan

1,1,1-trimethyl-n-(trimethylsilyl)-silanamin

BIS(TRIMETHYLSILYL)AMINE

HMDS

hexamethyl disilizane

HEXAMETHYLDISILYLAMINE

HEXAMETHYLDISILAZANE

Disilazane, 1,1,1,3,3,3-hexamethyl-

LABOTEST-BB LT01408762

1,1,1,3,3,3-HEXAMETHYLDISILAZANE

1,1,1-Trimethyl-N-(trimethylsilyl)silanamine

SILAZANE HMN

1,1,1,3,3,3-Hexamethyldisilazane(HMDS)

HEXAMETHYLDISILAZANE SEMICONDUCTOR GRADE

Hexamethyldisilazane, ReagentPlus(R), 99.9%

HEXAMETHYLDISILAZANE, WACKER QUALITY

HMDS, 30ML

HEXAMETHYLDISILAZANE, >=99%

1,1,1,3,3,3-Hexamithyl disilazane

(dimethyl-trimethylsilylamino-silyl)methane

1,1,1,3,3,3-HEXAMETHYLDISILAZANE ELECTRONIC GRADE 99+%

1,1,1,3,3,3-Hexamethylpropanedisilazane

2,2,4,4-Tetramethyl-3-aza-2,4-disilapentane

Di(trimethylsilyl)amine

1,1,1,3,3,3-Hexamethyldisilazane, 98+%

Hexamethyldisilazane,electronicgrade,99+%

Silanamine, trimethyl-N-trimethylsilyl-

1,1,1,3,3,3-HexaMethyldisilazane, 98%, AcroSeal

1,1,1,3,3,3-HexaMethyldisilazane, 98% 100ML

1,1,1,3,3,3-HexaMethyldisilazane, 98% 10ML

Hexamethyldisilazane,HMDS, Silazane HMN

Hexamethyldisilazane,1,1,1,3,3,3-Hexamethyldisilazane, HMDS

Hexamethyldisilazane,Dow Corning product Z-6079, HMDS

1,1,1,3,3,3-Hexamethyldisilazane, AcroSeal, 98%

Bis(trimethylsilyl)amine, HMDS

1,1,1,3,3,3HEXAMETHYLDISILAZANE FOR GAS

1,1,1,3,3,3-HEXAMETHYLDISILAZANE FOR SYN

hexamethyldisilazane(hmds)

hexamethylsilazane

sz6079

Trimethyl-N-(trimethylsilyl)silanamine

tsl8802

Co-Formula CFS-973

1,1,1,3,3,3HXAMETHLDISLAZAN

HMDS 999-97-3 1 kg

HMDS >=99%

MM capping agent

1,1,1,3,3,3-HexaMethyldisilazane (Related Reference)

DYNASYLAN HMDS

(diMethylsilyl)(Methyl)(triMethylsilyl)aMine

HexaMethyl disilylaMine (HMDS)

HMDS)HexaMethyl disilyla

1,1,1,3,3,3-hexaMethy

HexaMethyldisilazane reagent grade, >=99%

HexaMethyldisilazane aMine dioxane (HMDS)

HexaMethyldisilazane, 99.9%

HexaMethyldisilazane, J&KSeal