CAS 999-97-3|Hexamethyldisilazane

Introduction：Basic information about CAS 999-97-3|Hexamethyldisilazane, including its chemical name, molecular formula, synonyms, physicochemical properties, and safety information, etc.

Table of Contents

1. Names
2. Chemical & Physical Properties
3. Toxicological Information
CHEMICAL IDENTIFICATION
HEALTH HAZARD DATA
ACUTE TOXICITY DATA
4. Safety Information
5. Customs
6. Articles177
7. Synonyms

Common Name	Hexamethyldisilazane
CAS Number	999-97-3	Molecular Weight	161.393
Density	0.8±0.1 g/cm3	Boiling Point	126.0±9.0 °C at 760 mmHg
Molecular Formula	C₆H₁₉NSi₂	Melting Point	-78 °C
MSDS	ChineseUSA	Flash Point	30.0±18.7 °C
Symbol	GHS02, GHS06	Signal Word	Danger

Names

Name	hexamethyldisilazane
Synonym	More Synonyms

Chemical & Physical Properties

Density	0.8±0.1 g/cm3
Boiling Point	126.0±9.0 °C at 760 mmHg
Melting Point	-78 °C
Molecular Formula	C₆H₁₉NSi₂
Molecular Weight	161.393
Flash Point	30.0±18.7 °C
Exact Mass	161.105606
PSA	12.03000
LogP	2.32
Vapour Pressure	11.9±0.2 mmHg at 25°C
Index of Refraction	1.404
InChIKey	FFUAGWLWBBFQJT-UHFFFAOYSA-N
SMILES	C[Si](C)(C)N[Si](C)(C)C
Water Solubility	REACTS

Toxicological Information

CHEMICAL IDENTIFICATION

RTECS NUMBER :: JM9230000

CHEMICAL NAME :: Disilazane, 1,1,1,3,3,3-hexamethyl-

CAS REGISTRY NUMBER :: 999-97-3

LAST UPDATED :: 199710

DATA ITEMS CITED :: 17

MOLECULAR FORMULA :: C6-H19-N-Si2

MOLECULAR WEIGHT :: 161.44

WISWESSER LINE NOTATION :: 1-SI-1&1&M-SI-1&1&1

HEALTH HAZARD DATA

ACUTE TOXICITY DATA

TYPE OF TEST :: Standard Draize test

ROUTE OF EXPOSURE :: Administration onto the skin

SPECIES OBSERVED :: Rodent - rabbit

REFERENCE :: NTIS** National Technical Information Service. (Springfield, VA 22161) Formerly U.S. Clearinghouse for Scientific & Technical Information. Volume(issue)/page/year: OTS0533941 ** ACUTE TOXICITY DATA **

TYPE OF TEST :: LD50 - Lethal dose, 50 percent kill

ROUTE OF EXPOSURE :: Oral

SPECIES OBSERVED :: Rodent - rat

DOSE/DURATION :: 850 mg/kg

TOXIC EFFECTS :: Behavioral - general anesthetic Cardiac - pulse rate Lungs, Thorax, or Respiration - respiratory depression

REFERENCE :: GTPZAB Gigiena Truda i Professional'nye Zabolevaniya. Labor Hygiene and Occupational Diseases. (V/O Mezhdunarodnaya Kniga, 113095 Moscow, USSR) V.1-36, 1957-1992. For publisher information, see MTPEEI Volume(issue)/page/year: 30(5),52,1986

TYPE OF TEST :: LC50 - Lethal concentration, 50 percent kill

ROUTE OF EXPOSURE :: Inhalation

SPECIES OBSERVED :: Rodent - rat

DOSE/DURATION :: 8700 mg/m3/4H

TOXIC EFFECTS :: Behavioral - general anesthetic Cardiac - pulse rate Lungs, Thorax, or Respiration - respiratory depression

REFERENCE :: GTPZAB Gigiena Truda i Professional'nye Zabolevaniya. Labor Hygiene and Occupational Diseases. (V/O Mezhdunarodnaya Kniga, 113095 Moscow, USSR) V.1-36, 1957-1992. For publisher information, see MTPEEI Volume(issue)/page/year: 30(5),52,1986

TYPE OF TEST :: LD50 - Lethal dose, 50 percent kill

ROUTE OF EXPOSURE :: Intraperitoneal

SPECIES OBSERVED :: Rodent - rat

DOSE/DURATION :: 800 mg/kg

TOXIC EFFECTS :: Behavioral - tremor Behavioral - muscle weakness Skin and Appendages - hair

REFERENCE :: NTIS** National Technical Information Service. (Springfield, VA 22161) Formerly U.S. Clearinghouse for Scientific & Technical Information. Volume(issue)/page/year: OTS0537734

TYPE OF TEST :: LD50 - Lethal dose, 50 percent kill

ROUTE OF EXPOSURE :: Oral

SPECIES OBSERVED :: Rodent - mouse

DOSE/DURATION :: 850 mg/kg

TOXIC EFFECTS :: Behavioral - general anesthetic Cardiac - pulse rate Lungs, Thorax, or Respiration - respiratory depression

REFERENCE :: GTPZAB Gigiena Truda i Professional'nye Zabolevaniya. Labor Hygiene and Occupational Diseases. (V/O Mezhdunarodnaya Kniga, 113095 Moscow, USSR) V.1-36, 1957-1992. For publisher information, see MTPEEI Volume(issue)/page/year: 30(5),52,1986

TYPE OF TEST :: LC50 - Lethal concentration, 50 percent kill

ROUTE OF EXPOSURE :: Inhalation

SPECIES OBSERVED :: Rodent - mouse

DOSE/DURATION :: 12 gm/m3/2H

TOXIC EFFECTS :: Behavioral - general anesthetic Cardiac - pulse rate Lungs, Thorax, or Respiration - respiratory depression

REFERENCE :: GTPZAB Gigiena Truda i Professional'nye Zabolevaniya. Labor Hygiene and Occupational Diseases. (V/O Mezhdunarodnaya Kniga, 113095 Moscow, USSR) V.1-36, 1957-1992. For publisher information, see MTPEEI Volume(issue)/page/year: 30(5),52,1986

TYPE OF TEST :: LDLo - Lowest published lethal dose

ROUTE OF EXPOSURE :: Intraperitoneal

SPECIES OBSERVED :: Rodent - mouse

DOSE/DURATION :: 650 mg/kg

TOXIC EFFECTS :: Immunological Including Allergic - decreased immune response

REFERENCE :: StoGD# Personal Communication from G.D. Stoner, Dept. of Community Medicine, School of Medicine, Univ. of California, La Jolla, CA 92037, May 25, 1975 Volume(issue)/page/year: 27MAY1975

TYPE OF TEST :: LD50 - Lethal dose, 50 percent kill

ROUTE OF EXPOSURE :: Intravenous

SPECIES OBSERVED :: Rodent - mouse

DOSE/DURATION :: >100 mg/kg

TOXIC EFFECTS :: Details of toxic effects not reported other than lethal dose value

REFERENCE :: IAEC** Interagency Collaborative Group on Environmental Carcinogenesis, National Cancer Institute, Memorandum, June 17, 1974 Volume(issue)/page/year: 17JUN1974

TYPE OF TEST :: LD50 - Lethal dose, 50 percent kill

ROUTE OF EXPOSURE :: Oral

SPECIES OBSERVED :: Rodent - rabbit

DOSE/DURATION :: 1100 mg/kg

TOXIC EFFECTS :: Behavioral - general anesthetic Cardiac - pulse rate Lungs, Thorax, or Respiration - respiratory depression

REFERENCE :: GTPZAB Gigiena Truda i Professional'nye Zabolevaniya. Labor Hygiene and Occupational Diseases. (V/O Mezhdunarodnaya Kniga, 113095 Moscow, USSR) V.1-36, 1957-1992. For publisher information, see MTPEEI Volume(issue)/page/year: 30(5),52,1986

TYPE OF TEST :: LD50 - Lethal dose, 50 percent kill

ROUTE OF EXPOSURE :: Administration onto the skin

SPECIES OBSERVED :: Rodent - rabbit

DOSE/DURATION :: 710 uL/kg

TOXIC EFFECTS :: Behavioral - somnolence (general depressed activity) Lungs, Thorax, or Respiration - other changes Gastrointestinal - other changes

REFERENCE :: ATDAEI Acute Toxicity Data. Journal of the American College of Toxicology, Part B. (Mary Ann Liebert, Inc., 1651 Third Ave., New York, NY 10128) V.1- 1990- Volume(issue)/page/year: 12,576,1993

TYPE OF TEST :: LD50 - Lethal dose, 50 percent kill

ROUTE OF EXPOSURE :: Administration onto the skin

SPECIES OBSERVED :: Rodent - guinea pig

DOSE/DURATION :: 1 mL/kg

TOXIC EFFECTS :: Behavioral - tremor Behavioral - muscle weakness Skin and Appendages - hair

REFERENCE :: NTIS** National Technical Information Service. (Springfield, VA 22161) Formerly U.S. Clearinghouse for Scientific & Technical Information. Volume(issue)/page/year: OTS0537734 ** OTHER MULTIPLE DOSE TOXICITY DATA **

TYPE OF TEST :: TCLo - Lowest published toxic concentration

ROUTE OF EXPOSURE :: Inhalation

SPECIES OBSERVED :: Rodent - rat

DOSE/DURATION :: 98 mg/m3/4H/17W-I

TOXIC EFFECTS :: Brain and Coverings - recordings from specific areas of CNS Liver - liver function tests impaired

REFERENCE :: GTPZAB Gigiena Truda i Professional'nye Zabolevaniya. Labor Hygiene and Occupational Diseases. (V/O Mezhdunarodnaya Kniga, 113095 Moscow, USSR) V.1-36, 1957-1992. For publisher information, see MTPEEI Volume(issue)/page/year: 30(5),52,1986 ** TUMORIGENIC DATA **

TYPE OF TEST :: TDLo - Lowest published toxic dose

ROUTE OF EXPOSURE :: Intraperitoneal

SPECIES OBSERVED :: Rodent - mouse

DOSE/DURATION :: 1 gm/kg/I

TOXIC EFFECTS :: Tumorigenic - equivocal tumorigenic agent by RTECS criteria Lungs, Thorax, or Respiration - tumors

REFERENCE :: JNCIAM Journal of the National Cancer Institute. (Washington, DC) V.1-60, 1940-78. For publisher information, see JJIND8. Volume(issue)/page/year: 54,495,1975 *** NIOSH STANDARDS DEVELOPMENT AND SURVEILLANCE DATA *** NIOSH OCCUPATIONAL EXPOSURE SURVEY DATA : NOES - National Occupational Exposure Survey (1983) NOES Hazard Code - X4131 No. of Facilities: 220 (estimated) No. of Industries: 10 No. of Occupations: 22 No. of Employees: 30908 (estimated) No. of Female Employees: 4223 (estimated)

Safety Information

Symbol	GHS02, GHS06
Signal Word	Danger
Hazard Statements	H225-H302 + H332-H311-H412
Precautionary Statements	P210-P261-P273-P280-P302 + P352 + P312-P304 + P340 + P312
Personal Protective Equipment	Faceshields;full-face respirator (US);Gloves;Goggles;multi-purpose combination respirator cartridge (US);type ABEK (EN14387) respirator filter
Hazard Codes	C:Corrosive
Risk Phrases	R11;R20/21/22;R34
Safety Phrases	S16-S26-S36/37/39-S45
RIDADR	UN 3286 3/PG 2
WGK Germany	2
RTECS	JM9230000
Packaging Group	II
Hazard Class	3
HS Code	2929909090

Customs

HS Code	2931900090
Summary	2931900090. other organo-inorganic compounds. VAT:17.0%. Tax rebate rate:13.0%. Supervision conditions:AB(certificate of inspection for goods inward,certificate of inspection for goods outward). MFN tariff:6.5%. General tariff:30.0%

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Synonyms

SILAZANE HMN

MFCD00008259

tsl8802

HEXAMETHYLISILAZNE

Hexamethyldisilazane

HMDS

1,1,1,3,3,3-hexamethyl-disilazane,lithium salt

hexamethylsilazane

EINECS 213-668-5

HMDZ

1,1,1,3,3,3-hexa-methyldisilazane

sz6079

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