Hexamethyldisilazane CAS#999-97-3

CAS Number: 999-97-3
Chemical Formula: C6H19NSi2
Synonyms:

HEXAMETHYLDISILAZANE
HEXAMETHYLDISILYLAMINE
hexamethyl disilizane

Appearance: Transperant Liquid

MOQ (Minimum Order Quantity): 1 FCL (Full Container Load)

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Product Details

Hexamethyldisilazane CAS#999-97-3

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.

Hexamethyldisilazane Chemical Properties

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.)
Fp	57.2 °F
storage temp.	Store below +30°C.
solubility	Miscible with acetone, benzene, ethyl ether, heptane and perchloroethylene.
form	Liquid
pka	30(at 25℃)
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)

Safety Information

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	TSCA listed
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)

Product Application of Hexamethyldisilazane CAS#999-97-3

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.

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