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Cas Database

Name	Dimethyltin dichloride	EINECS	212-039-2
CAS No.	753-73-1	Density	1,397 g/cm3
PSA	0.00000	LogP	2.16580
Solubility	methanol: 0.1 g/mL, clear	Melting Point	101-106 °C(lit.)
Formula	C₂H₆Cl₂Sn	Boiling Point	124 °C at 760 mmHg
Molecular Weight	219.686	Flash Point	28.8 °C
Transport Information	UN 2923 8/PG 2	Appearance	white crystalline powder
Safety	26-36/37/39-45	Risk Codes	23/24/25-36/37/38
Molecular Structure		Hazard Symbols	T
Synonyms	Tin,dimethyl-, dichloride (6CI);Cotin 210;Dichlorodimethylstannane;Dichlorodimethyltin;Dimethylstannyl dichloride;Dimethyltin(IV) dichloride;NSC 55159;Dichloro(dimethyl)stannane;stannane, dichlorodimethyl-;	Article Data	131

Dimethyltin dichloride Synthetic route

: 1118-46-3
Trichlorbutylstannan

: 594-27-4
tetramethylstannane

A: 753-73-1
dimethyltin dichloride

B: 15649-24-8
butyl-methyl-tin dichloride

Conditions

Conditions	Yield
2-fold excess of C4H9SnCl3, 180°C, 2h;	A n/a B 99.4%
2-fold excess of C4H9SnCl3, 180°C, 2h;	A n/a B 99.4%

: 85294-03-7
3,3-bis(trimethylstannyl)propyl ethyl sulfoxide

: 7646-78-8
tin(IV) chloride

A: 91230-56-7
3,3-bis(dichloromethylstannyl)propyl ethyl sulfoxide

B: 753-73-1
dimethyltin dichloride

Conditions

Conditions	Yield
In dichloromethane soln. of SnCl4 (14.4 mmol) added at 0 °C to soln. of the sulfoxide (7.2 mmol); slowly warming to room temp.; refluxing (20 h); evapn. (rotary evaporator); SnMe2Cl2 removed (0.01 torr, 60 °C);recrystn. (CH2Cl2/hexane); elem. anal.; mol. wt. calc.: 527.46; mol. wt. found: 593.27 (isopiestic in CH2Cl2 at 22 °C);	A 97% B n/a

: 1739-53-3
ethyl-dichloro-borane

: 1,3-di-tert-butyl-2,2,4,4-tetramethyl-1,3,2,4-diazadistannaetidine

A: 96609-50-6
1,3-di-tert-butyl-2,4-diethyl-1,3,2,4-diazadiboretidine

B: 753-73-1
dimethyltin dichloride

Conditions

Conditions	Yield
In dichloromethane under N2, EtBCl2 in CH2Cl2 droped to a soln. of Sn-compound at -78°C under stirring, warmed to room temp. and stirred for 6 h; solvent removed under vacuo, sublimed; elem. anal.;	A 83% B 96%

: 24335-35-1, 35107-68-7
{ClPN((CH3)3C)}2

: 1,3-di-tert-butyl-2,2,4,4-tetramethyl-1,3,2,4-diazadistannaetidine

A: {ClPN2((CH3)3C)2Sn(CH3)2}

B: 753-73-1
dimethyltin dichloride

C: 149695-99-8
2,4,6,7-Tetra-tert-butyl-3,3-dimethyl-2,4,6,7-tetraaza-1,5-diphospha-3-stannabicyclo<3.1.1>heptan

Conditions

Conditions	Yield
In dichloromethane dropwise addn. of (ClPN((CH3)3C))2 in CH2Cl2 to soln. of ((CH3)2SnN((CH3)3C))2 in CH2Cl2 under stirring; refluxing for 3 h; filtration; performed under N2;; evapn.; sublimation at 50°C and 2E-6 Torr for 2 d with isolation of (CH3)2SnCl2; dissolving residue in CH2Cl2 and repeated sublimation; dissolving residue in CH2Cl2 and cooling to -20°C with isolation of stannabicycloheptane; elem. anal.;;	A 0% B 96% C 83%

Yield

In dichloromethane dropwise addn. of (ClPN((CH3)3C))2 in CH2Cl2 to soln. of ((CH3)2SnN((CH3)3C))2 in CH2Cl2 under stirring; refluxing for 3 h; filtration; performed under N2;; evapn.; sublimation at 50°C and 2E-6 Torr for 2 d with isolation of (CH3)2SnCl2; dissolving residue in CH2Cl2 and repeated sublimation; dissolving residue in CH2Cl2 and cooling to -20°C with isolation of stannabicycloheptane; elem. anal.;;

A 0%
B 96%
C 83%

: 594-27-4
tetramethylstannane

A: 676-85-7
methylsulphinyl chloride

B: 753-73-1
dimethyltin dichloride

Conditions

Conditions	Yield
With thionyl chloride from 0 deg C up to room temp.; reflux, 30 min;	A 66.7% B 95%

: 7719-09-7
thionyl chloride

: 594-27-4
tetramethylstannane

A: 676-85-7
methylsulphinyl chloride

B: 753-73-1
dimethyltin dichloride

Conditions

Conditions	Yield
In not given dropwise addn. of thionyl chloride to tetraalkyltin(IV) compd. under dry N2 atmosphere under ice cooling, warming to room temp., refluxing for 30 min; distn. (removal of excess of SOCl2), cooling resulting liquids, sepn., elem. anal.;	A 66.7% B 95%

: 10294-34-5
boron trichloride

: 1,3-di-tert-butyl-2,2,4,4-tetramethyl-1,3,2,4-diazadistannaetidine

A: 4262-38-8
1,3,5,7-Tetra-tert-butyl-2,4,6,8-tetrachloro-[1,3,5,7,2,4,6,8]tetrazatetraborocane

B: 753-73-1
dimethyltin dichloride

Conditions

Conditions	Yield
In dichloromethane under N2, BCl3 in CH2Cl2 added dropwise to a soln. of Sn-compound at -70°C, warmed to room temp.; solvent removed after 2 h at 1E-2 Torr, Et2SnCl2 removed at 5E-6 Torr, residue recrystd. (CH2Cl2); elem. anal.;	A 90% B 93%

: 83135-39-1
bis(chlorodimethylstannyl)methane

: 7646-78-8
tin(IV) chloride

A: 79992-67-9
(chlorodimethylstannyl)(dichloromethylstannyl)methane

B: 753-73-1
dimethyltin dichloride

Conditions

Conditions	Yield
In dichloromethane 1 mol of bis(dimethylchlorostannyl)methane, CH2Cl2 and 0.5 mol SnCl4 placed into flask, warmed, solvent removed (vac.), heated at 60°C for 36 h; stirred under 0.01 Torr with warming to 60°C, recrystd. (CCl4); elem. anal.;	A 93% B n/a

: 10294-34-5
boron trichloride

: 801-79-6
dimethylbis(pentafluorophenyl)tin

A: 2720-03-8
bis(pentafluorophenyl)boron chloride

B: 753-73-1
dimethyltin dichloride

Conditions

Conditions	Yield
In n-heptane at -70 - 105℃;	A 82% B 90%
educts closed in sealed tube in vac., leaving at room temp. for 30 min, then heating at 100°C for 2 h; (CH3)2SnCl2 removed by vac. sublimation, product distd. in vac.;	A 36% B n/a
educts closed in sealed tube in vac., leaving at room temp. for 30 min, then heating at 100°C for 2 h; (CH3)2SnCl2 removed by vac. sublimation, product distd. in vac.;	A 36% B n/a
20-100°C, closed tube;;
20-100°C, closed tube;;

: 873-51-8
phenylborondichloride

: 1,3-di-tert-butyl-2,2,4,4-tetramethyl-1,3,2,4-diazadistannaetidine

A: 103382-72-5
1,3-di-tert-butyl-2,4,-diphenyl-1,3,2,4-diazadiboretidine

B: 753-73-1
dimethyltin dichloride

Conditions

Conditions	Yield
In dichloromethane under N2, PhBCl2 in CH2Cl2 droped to a soln. of Sn-compound at -78°C under stirring, warmed to room temp.; volatiles removed at room temp. and 1E-2 Torr, Et2SnCl2 sublimed at 0°C and 1E-5 Torr, residue recrystd. (CH2Cl2); elem. anal.;	A 90% B >99

Dimethyltin dichloride Consensus Reports

Reported in EPA TSCA Inventory.

Dimethyltin dichloride Standards and Recommendations

OSHA PEL: TWA 0.1 mg(Sn)/m³
ACGIH TLV: TWA 0.1 mg(Sn)/m³; STEL 0.2 mg/m³ (skin)
NIOSH REL: (organotin compounds): TWA 0.1 mg(Sn)/m³

Dimethyltin dichloride Analytical Methods

For occupational chemical analysis use NIOSH: Organotin Compounds 5504.

Dimethyltin dichloride Specification

The Dimethyltin dichloride, with the CAS registry number 753-73-1 and EINECS registry number 212-039-2, has the systematic name and IUPAC name of dichloro(dimethyl)stannane. The molecular formula of this chemical is C₂H₆Cl₂Sn. It is a white crystalline powder which is sensitive to moisture, and should be sealed and stored at 2-8°C. It belongs to the following product categories: Alkyl Metals; Classes of Metal Compounds; Grignard Reagents & Alkyl Metals; Sn (Tin) Compounds; Synthetic Organic Chemistry; Typical Metal Compounds.

The physical properties of Dimethyltin dichloride are as following: (1)ACD/LogP: -2.18; (2)# of Rule of 5 Violations: 0; (3)ACD/LogD (pH 5.5): -2.18; (4)ACD/LogD (pH 7.4): -2.18; (5)ACD/BCF (pH 5.5): 1; (6)ACD/BCF (pH 7.4): 1; (7)ACD/KOC (pH 5.5): 1.55; (8)ACD/KOC (pH 7.4): 1.55; (9)#H bond acceptors: 0; (10)#H bond donors: 0; (11)#Freely Rotating Bonds: 0; (12)Polar Surface Area: 0 Å²; (13)Flash Point: 28.8 °C; (14)Enthalpy of Vaporization: 34.7 kJ/mol; (15)Boiling Point: 124 °C at 760 mmHg; (16)Vapour Pressure: 15.7 mmHg at 25°C.

Preparation and uses of Dimethyltin dichloride: It can be prepared by metallic tin and methyl chloride in the presence of magnesium (Mg). And it is always used as magnesium or magnesium alloys corrosion inhibitor, PVC stabilizer, electroluminescence materials and catalysts.

You should be cautious while dealing with this chemical. It irritates eyes, respiratory system and skin, and it is also toxic by inhalation, in contact with skin and if swallowed. Therefore, you had better take the following instructions: Wear suitable protective clothing, gloves and eye/face protection, and in case of contacting with eyes, rinse immediately with plenty of water and seek medical advice; In case of accident or if you feel unwell, seek medical advice immediately (show label where possible).

You can still convert the following datas into molecular structure:
(1)SMILES: Cl[Sn](Cl)(C)C
(2)InChI: InChI=1/2CH3.2ClH.Sn/h2*1H3;2*1H;/q;;;;+2/p-2/rC2H6Cl2Sn/c1-5(2,3)4/h1-2H3
(3)InChIKey: PKKGKUDPKRTKLJ-KVKMAUGKAV

The toxicity data is as follows:

Organism	Test Type	Route	Reported Dose (Normalized Dose)	Source
mouse	LD50	intravenous	56mg/kg (56mg/kg)	U.S. Army Armament Research & Development Command, Chemical Systems Laboratory, NIOSH Exchange Chemicals. Vol. NX#02187,
rabbit	LDLo	oral	50mg/kg (50mg/kg)	Sangyo Igaku. Japanese Journal of Industrial Health. Vol. 15, Pg. 3, 1973.
rat	LD50	oral	73900ug/kg (73.9mg/kg)	Tin Research Institute, Publication. Vol. -, Pg. 1, 1973.
rat	LD50	unreported	74mg/kg (74mg/kg)	Tin and Its Uses. Vol. 107, Pg. 1, 1976.
rat	LDLo	intravenous	40mg/kg (40mg/kg)	British Journal of Industrial Medicine. Vol. 15, Pg. 15, 1958.

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