Basic information
- Name:
Dichlorodimethylsilane
- CAS No.:
75-78-5
- Molecular Structure:
- Formula:
- C2H6Cl2Si
- Molecular Weight:
- 129.06
- Synonyms:
- DCDMS;Dichlorodimethylsilicon;Dimethylsilane dichloride;Inerton AW-DMCS;KA 12;KA 22;LS 130;LS 130(silane);M 2 (silane);NSC 77070;Repel-Silane;Silane,dichlorodimethyl-;
- EINECS:
- 200-901-0
- Density:
- 1.075 g/cm3
- Melting Point:
- -76 °C
- Boiling Point:
- 69.999 °C at 760 mmHg
- Flash Point:
- -9 °C
- Solubility:
- reacts with water
- Appearance:
- Colorless to brown liquid
- Hazard Symbols:
Xn, 
Xi, 
F, 
N- Risk Codes:
- 20-59-36/37/38-11-67-65-63-48/20-38-20/21-50/53
- Safety Description:
- 60-61-62-36/37-59 Details
- Transport Information:
- UN 2924 3/PG 2
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Chemistry
The Molecular Structure of Dichlorodimethylsilane (CAS NO.75-78-5):
Molecular Formula: C2H6Cl2Si
Molecular Weight: 129.06
EINECS: 200-901-0
Density: 1.06
Melting Point: -76 °C
Boiling Point: 70 °C
Flash Point: -9 °C
Appearance: Colourless liquid
Storage temp: Store at 0-5°C
Water Solubility: reacts
Sensitive: Moisture Sensitive
IUPAC: dichloro(dimethyl)silane
Synonyms: Dichlorodimethyl-silan ; Dichlorodimethylsilicon ; Dimethyldichlorosilicane ; Dimethyl-dichlorsilan ; Dimethyl-dichlorsilan(czech) ; Dimethyldichlorsilane ; Dimethylsilanedichloride
Stability: Stable. Reacts violently with water and alcohols. Highly flammable. Incompatible with strong oxidizing agents, water, alcohols, caustics, ammonia.
Product Categories: Chloro;Silicon Compounds;Organics;Dichlorosilanes;Dichlorosilanes (for Polysilanes);Functional Materials;Reagent for High-Performance Polymer Research;Si (Classes of Silicon Compounds);Si-Cl Compounds;Silicon Compounds (for Synthesis);Synthetic Organic Chemistry;Chloro Silanes
Uses
Dichlorodimethylsilane (CAS NO.75-78-5) is used in ethchlorvynol assay.
Toxicity Data With Reference
| 1. | skn-rbt 20 mg/24H MOD | 85JCAE Prehled Prumyslove Toxikologie; Organicke Latky Marhold, J.,Prague, Czechoslovakia.: Avicenum,1986,1219. | ||
| 2. | eye-rbt 5 mg/24H SEV | 85JCAE Prehled Prumyslove Toxikologie; Organicke Latky Marhold, J.,Prague, Czechoslovakia.: Avicenum,1986,1219. | ||
| 3. | orl-rat LD50:5660 µL/kg | JACTDZ Journal of the American College of Toxicology. 12 (1993),573. | ||
| 4. | ihl-rat LC50:930 ppm/4H | 85JCAE Prehled Prumyslove Toxikologie; Organicke Latky Marhold, J.,Prague, Czechoslovakia.: Avicenum,1986,1219. | ||
| 5. | ipr-rat LDLo:10 mg/kg | JIDHAN Journal of Industrial Hygiene. 30 (1948),332. | ||
| 6. | ihl-mus LC50:300 mg/m3/2H | TPKVAL Toksikologiya Novykh Promyshlennykh Khimicheskikh Veshchestv. Toxicology of New Industrial Chemical Sciences. 3 (1961),23. |
Consensus Reports
EPA Extremely Hazardous Substances List. Reported in EPA TSCA Inventory.
Safety Profile
Poison by ingestion and intraperitoneal routes. Moderately toxic by inhalation. A skin and severe eye irritant. Violent reaction on contact with water. When heated to decomposition it emits toxic fumes of Cl−. See also CHLOROSILANES.
Hazard Codes: 
XiXn
F
N
Risk Statements: 20-59-36/37/38-11-67-65-63-48/20-38-20/21-50/53
R20: Harmful by inhalation
R59: Dangerous to the ozone layer
R36/37/38: Irritating to eyes, respiratory system and skin
R11: Highly flammable
R67: Vapours may cause drowsiness and dizziness
R65: Harmful: may cause lung damage if swallowed
R63: Possible risk of harm to the unborn child
R38: Irritating to skin
R20/21: Harmful by inhalation and in contact with skin
R50/53: Very toxic to aquatic organisms, may cause long-term adverse effects in the aquatic environment
Safety Statements: 60-61-62-36/37-59
S60: This material and its container must be disposed of as hazardous waste
S61: Avoid release to the environment. Refer to special instructions / safety data sheets
S62: If swallowed, do not induce vomitting; seek medical advice immediately and show this container or label
S36/37: Wear suitable protective clothing and gloves
S59: Refer to manufacturer / supplier for information on recovery / recycling
RIDADR: UN 2924 3/PG 2
WGK Germany: 3
RTECS: VV3150000
F: 3-10-19-21
TSCA: Yes
HazardClass: 3
PackingGroup: II
HS Code: 29310095
Standards and Recommendations
DOT Classification: 3; Label: Flammable Liquid, Corrosive