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Cas Database

Name	Chloromethyldichloromethylsilane	EINECS	216-319-5
CAS No.	1558-33-4	Density	1.243 g/cm³
PSA	0.00000	LogP	2.73230
Solubility	reacts with water	Melting Point	<0°C
Formula	C₂H₅Cl₃Si	Boiling Point	120 °C at 760 mmHg
Molecular Weight	163.506	Flash Point	35 °C
Transport Information	UN 2927 6.1/PG 2	Appearance	Clear to straw liquid
Safety	26-36/37/39-45-8-16	Risk Codes	R10;R14;R20;R34
Molecular Structure		Hazard Symbols	C
Synonyms	(Chloromethyl)dichloromethylsilane;(Chloromethyl)methyldichlorosilane;Dichloro(chloromethyl)methylsilane;LS 110;Methyl(chloromethyl)dichlorosilane;Methyldichloro(chloromethyl)silane;Silane,dichloro(chloromethyl)methyl-;	Article Data	25

Chloromethyldichloromethylsilane Synthetic route

: 75-78-5
dimethylsilicon dichloride

: 1558-33-4
chloromethylmethyldichlorosilane

Conditions

Conditions	Yield
With chlorine Irradiation;	98%
With chlorine for 3h; Irradiation; visible light;	89%
With chlorine Irradiation.mit UV-Licht in der Dampfphase;

: 75-78-5
dimethylsilicon dichloride

A: 1558-31-2
(dichloromethyl)methyldichlorosilane

B: 1558-33-4
chloromethylmethyldichlorosilane

Conditions

Conditions	Yield
With chlorine for 15h; Heating; Irradiation;	A 8% B 89%
With SO2Cl2 In further solvent(s) boiling of (CH3)2SiCl2 and SO2Cl2 in bromobenzene in presence of dibenzoyl peroxide for a longer period of time;;
With SO2Cl2 In tetrachloromethane boiling of (CH3)2SiCl2 and SO2Cl2 in CCl4 in presence of dibenzoyl peroxide for a longer period of time;;
With SO2Cl2 In chlorobenzene boiling of (CH3)2SiCl2 and SO2Cl2 in chlorobenzene in presence of dibenzoyl peroxide for a longer period of time;;

: 75-78-5
dimethylsilicon dichloride

A: 1558-31-2
(dichloromethyl)methyldichlorosilane

B: 77428-14-9
(Dichloro-methyl-silanyl)-methanesulfonyl chloride

C: 1558-33-4
chloromethylmethyldichlorosilane

Conditions

Conditions	Yield
With yttrium(III) chloride; sulfuryl dichloride at 70℃; for 10h; Product distribution; Irradiation; other catalysts (HoCl3,TmCl3);	A 10% B 38% C 42%
With sulfuryl dichloride; copper dichloride at 50 - 70℃; Product distribution; Irradiation; various inorganic additives (chlorides and oxychlorides of 32 elements), effect of addition of S; effect of inorganic chlorides and oxychlorides on the photochemical reaction of methylchlorosilanes with SO2Cl2;	A 26 % Spectr. B 8 % Spectr. C 15 % Spectr.

: 186581-53-3, 908094-01-9
diazomethane

: 75-79-6
Methyltrichlorosilane

: 1558-33-4
chloromethylmethyldichlorosilane

Conditions

Conditions	Yield
copper In diethyl ether (CH3)SiCl3 and diazomethane in ether above -30°C with Cu powder as catalyst;;	12%
copper(II) sulfate In diethyl ether (CH3)SiCl3 and diazomethane in ether above -30°C with anhyd. CuSO4 as catalyst;;	12%
With diethyl ether; copper(II) sulfate
With diethyl ether; copper

: 3704-44-7
octamethyltrisilane

A: 75-77-4
chloro-trimethyl-silane

B: 1719-57-9
Chloro(chloromethyl)dimethylsilane

C: 75-78-5
dimethylsilicon dichloride

D: 1558-33-4
chloromethylmethyldichlorosilane

Conditions

Conditions	Yield
With tetrachloromethane; Perbenzoic acid; chlorine 1) 80 deg C, 18 h; 2) 5-10 deg C; Multistep reaction;

: 7782-50-5
chlorine

: 75-78-5
dimethylsilicon dichloride

A: 1558-31-2
(dichloromethyl)methyldichlorosilane

B: 4218-23-9
(trichloromethyl)methyldichlorosilane

C: 1558-33-4
chloromethylmethyldichlorosilane

D dichloro-bis-chloromethyl-silane(?): dichloro-bis-chloromethyl-silane(?)

Conditions

Conditions	Yield
at 24 - 40℃; UV-Licht.Irradiation;
at 24 - 40℃; UV-Licht.Irradiation;

...Expand

: 75-78-5
dimethylsilicon dichloride

A: 1558-31-2
(dichloromethyl)methyldichlorosilane

B: 4218-23-9
(trichloromethyl)methyldichlorosilane

C: 1558-33-4
chloromethylmethyldichlorosilane

Conditions

Conditions	Yield
With chlorine In not given Irradiation (UV/VIS); (CH3)2SiCl2 and Cl2 at 20-40°C under irradiation of light;;
With Cl2 In not given Irradiation (UV/VIS); (CH3)2SiCl2 and Cl2 at 20-40°C under irradiation of light;;

: 112746-60-8
dimethylhydrazone of the trimethylsilyl ester of benzoic acid

: 1558-33-4
chloromethylmethyldichlorosilane

: ((N-dimethylamino)benzimidato-N,O)(1-(1,1-dimethyl-2-benzoylhydrazonium)methyl-C,O)-methylsilicon(IV) chloride

Conditions

Conditions	Yield
In hexane; chloroform at 20℃; for 168000h;	99%

: 999-97-3
1,1,1,3,3,3-hexamethyl-disilazane

: 1558-33-4
chloromethylmethyldichlorosilane

A: 75-77-4
chloro-trimethyl-silane

B: 135764-55-5
1-Chloro-1-chloromethyl-1,3,3,3-tetramethyl-disilazane

Conditions

Conditions	Yield
at 20℃; for 24h;	A n/a B 98%

: 2078-22-0
ortho-phthalic acid bis(trimethylsilyl) ester

: 1558-33-4
chloromethylmethyldichlorosilane

: chloromethyl(methyl)silyl ortho-phthalate

Conditions

Conditions	Yield
for 24h; Ambient temperature;	97%

Chloromethyldichloromethylsilane Chemical Properties

The Molecular Structure of Chloromethyldichloromethylsilane (CAS NO.1558-33-4):

Empirical Formula: C₂H₅Cl₃Si
Molecular Weight: 163.5056
Nominal Mass: 162 Da
Average Mass: 163.5056 Da
Monoisotopic Mass: 161.922609 Da
Index of Refraction: 1.439
Molar Refractivity: 34.57 cm³
Molar Volume: 131.4 cm³
Surface Tension: 22.4 dyne/cm
Density: 1.243 g/cm³
Flash Point: 35 °C
Enthalpy of Vaporization: 34.33 kJ/mol
Boiling Point: 120 °C at 760 mmHg
Vapour Pressure: 18.6 mmHg at 25°C
Water solubility: reacts
IUPAC Name: dichloro-(chloromethyl)-methylsilane
Appearance: Clear to straw liquid
Product Categories: Dichlorosilanes;Si (Classes of Silicon Compounds);Si-Cl Compounds;Silicon Compounds (for Synthesis);Synthetic Organic Chemistry;Alpha Silanes;Chloro Silanes
Synonyms: EINECS 216-319-5 ; Dichloro(chloromethyl)methylsilane ; Silane, dichloro(chloromethyl)methyl- Silane, dichloro(chloromethyl)methyl-

Chloromethyldichloromethylsilane Toxicity Data With Reference

Organism	Test Type	Route	Reported Dose (Normalized Dose)	Effect	Source
rat	LC50	inhalation	6800mg/m³/4H (6800mg/m³)	LUNGS, THORAX, OR RESPIRATION: DYSPNEA	National Technical Information Service. Vol. OTS0540526,

Chloromethyldichloromethylsilane Safety Profile

Hazard Codes: Corrosive C
Risk Statements: 10-14-20-35-37-34
R10: Flammable
R14: Reacts violently with water
R20: Harmful by inhalation
R35: Causes severe burns
R37: Irritating to respiratory system
R34: Causes burns
Safety Statements: 26-36/37/39-45-8-16
S26: In case of contact with eyes, rinse immediately with plenty of water and seek medical advice
S36/37/39: Wear suitable protective clothing, gloves and eye/face protection
S45: In case of accident or if you feel unwell, seek medical advice immediately (show the label whenever possible.)
S16: Keep away from sources of ignition
RIDADR: UN 2927 6.1/PG 2
WGK Germany: 3
RTECS: VV2160000
F: 10
TSCA: Yes
HazardClass: 3.2
PackingGroup: III

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