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Cas Database |
| Name |
Dichlorodimethylsilane |
EINECS | 200-901-0 |
| CAS No. | 75-78-5 | Density | 1.075 g/cm3 |
| PSA | 0.00000 | LogP | 2.16580 |
| Solubility | reacts with water | Melting Point |
-76 °C |
| Formula | C2H6Cl2Si | Boiling Point | 69.999 °C at 760 mmHg |
| Molecular Weight | 129.061 | Flash Point | -9 °C |
| Transport Information | UN 2924 3/PG 2 | Appearance | Colorless to brown liquid |
| Safety | 60-61-62-36/37-59 | Risk Codes | 20-59-36/37/38-11-67-65-63-48/20-38-20/21-50/53 |
| Molecular Structure |
|
Hazard Symbols |
 Xn,  Xi,  F,  N
|
| 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-;Dichlorodimethylsilane; |
Article Data | 220 |
Dichlorodimethylsilane Synthetic route
- 75-76-3
tetramethylsilane
- 10038-98-9
germaniumtetrachloride
A
- 75-77-4
chloro-trimethyl-silane
B
- 1529-47-1
chlorotrimethylgermane
C
- 75-78-5
dimethylsilicon dichloride
| Conditions | Yield |
|---|---|
| aluminium bromide In neat (no solvent) molar ratio Me4Si/GeCl4 = 2/1, at 200°C for 15 h, cooled; NMR, mass spectra, chromy.; | A 50% B 100% C 50% |
- 75-76-3
tetramethylsilane
- 10038-98-9
germaniumtetrachloride
A
- 993-10-2
methyltrichlorogermane
B
- 75-78-5
dimethylsilicon dichloride
C
- 1529-48-2
dichlorodimethylgermanium
| Conditions | Yield |
|---|---|
| aluminium bromide In neat (no solvent) molar ratio Me4Si/GeCl4 = 0.5/1, at 200°C for 28 h, cooled; NMR, mass spectra, chromy.; | A 64% B 100% C 36% |
- 75-76-3
tetramethylsilane
- 10038-98-9
germaniumtetrachloride
A
- 1529-47-1
chlorotrimethylgermane
B
- 75-78-5
dimethylsilicon dichloride
C
- 1529-48-2
dichlorodimethylgermanium
| Conditions | Yield |
|---|---|
| aluminium bromide In neat (no solvent) molar ratio Me4Si/GeCl4 = 1/1, at 200°C for 56 h, cooled; NMR, mass spectra, chromy.; | A 14% B 100% C 86% |
- 676-97-1
methylphosphonic acid dichloroanhydride
- 23272-12-0
methoxydimethylsilyl cyanide
A
- 101153-04-2
methyl (cyano)methylphosphonate
B
- 75-78-5
dimethylsilicon dichloride
| Conditions | Yield |
|---|---|
| at 40 - 45℃; for 0.0833333h; | A 87.6% B 97% |
| Conditions | Yield |
|---|---|
| With methylene chloride; copper In neat (no solvent) vibrating of the Si-Cu powder;; | 97% |
| With methylene chloride; copper In neat (no solvent) CH3Cl and Si-Cu/Cu-oxide at 300-375°C;; | 82.4% |
| With methylene chloride; copper In neat (no solvent) CH3Cl and Si purified by treatment with strong acids;; | |
| With methylene chloride In neat (no solvent) | |
| With CH3Cl In neat (no solvent) |
- 1027-80-1
2,2-dimethyl-1,3-diphenyl-[1,3,2]diazasilolidine
A
- 75-78-5
dimethylsilicon dichloride
B
- 2179-98-8
2-(1,1-dibutyl-pentyl)-1,3-diphenyl-[1,3,2]diazaborolidine
| Conditions | Yield |
|---|---|
| A n/a B 95% | |
| A n/a B 95% |
- 75-76-3
tetramethylsilane
- 10038-98-9
germaniumtetrachloride
A
- 75-77-4
chloro-trimethyl-silane
B
- 1529-47-1
chlorotrimethylgermane
C
- 993-10-2
methyltrichlorogermane
D
- 75-78-5
dimethylsilicon dichloride
E
- 1529-48-2
dichlorodimethylgermanium
| Conditions | Yield |
|---|---|
| aluminium bromide In neat (no solvent) molar ratio Me4Si/GeCl4 = 1/1, at 200°C for 22 h, cooled; NMR, mass spectra, chromy.; | A 6% B 30% C 15% D 94% E 56% |
| aluminium bromide In neat (no solvent) molar ratio Me4Si/GeCl4 = 0.5/1, at 200°C for 6 h, cooled; NMR, mass spectra, chromy.; | A 26% B 33% C 30% D 74% E 37% |
| aluminium bromide In neat (no solvent) molar ratio Me4Si/GeCl4 = 1/1, at 200°C for 6 h, cooled; NMR, mass spectra, chromy.; | A 60% B 54% C 11% D 40% E 35% |
| Conditions | Yield |
|---|---|
| With triphenylphosphine | 91% |
- 75-76-3
tetramethylsilane
- 10038-98-9
germaniumtetrachloride
A
- 75-77-4
chloro-trimethyl-silane
B
- 1529-47-1
chlorotrimethylgermane
C
- 865-52-1
tetramethylgermane
D
- 75-78-5
dimethylsilicon dichloride
| Conditions | Yield |
|---|---|
| aluminium bromide In neat (no solvent) molar ratio Me4Si/GeCl4 = 4/1, at 200°C for 8 h, cooled; NMR, mass spectra, chromy.; | A 91% B 60% C 40% D 9% |
| aluminium bromide In neat (no solvent) molar ratio Me4Si/GeCl4 = 0.33/1, at 200°C for 5 h, cooled; NMR, mass spectra, chromy.; | A 89% B 74% C 26% D 11% |
| aluminium bromide In neat (no solvent) molar ratio Me4Si/GeCl4 = 3/1, at 200°C for 21 h, cooled; NMR, mass spectra, chromy.; | A 80% B 80% C 20% D 20% |
- 1027-80-1
2,2-dimethyl-1,3-diphenyl-[1,3,2]diazasilolidine
A
- 75-78-5
dimethylsilicon dichloride
B
- 2179-97-7
2-(1,1-dibenzyl-2-phenyl-ethyl)-1,3-diphenyl-[1,3,2]diazaborolidine
| Conditions | Yield |
|---|---|
| A n/a B 90% | |
| A n/a B 90% |
Dichlorodimethylsilane Chemical Properties
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
Dichlorodimethylsilane Uses
Dichlorodimethylsilane (CAS NO.75-78-5) is used in ethchlorvynol assay.
Dichlorodimethylsilane 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. |
Dichlorodimethylsilane Consensus Reports
EPA Extremely Hazardous Substances List. Reported in EPA TSCA Inventory.
Dichlorodimethylsilane 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
Dichlorodimethylsilane Standards and Recommendations
DOT Classification: 3; Label: Flammable Liquid, Corrosive
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