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Name	Trimethyltin hydroxide	EINECS	N/A
CAS No.	56-24-6	Density	g/cm³
PSA	20.23000	LogP	0.81360
Solubility	Soluble in water.	Melting Point	118°C
Formula	C3H10 O Sn	Boiling Point	80°C
Molecular Weight	180.822	Flash Point	°C
Transport Information	N/A	Appearance	N/A
Safety	Poison by subcutaneous route. When heated to decomposition it emits acrid smoke and irritating fumes. See also TIN COMPOUNDS.
Analytical Methods:		For occupational chemical analysis use NIOSH: Organotin Compounds 5504.	Risk Codes	T+:Very toxic;
Molecular Structure		Hazard Symbols	A poison. TWA 0.1 mg(Sn)/m³; STEL 0.2 mg(Sn)/m³ (skin).
Synonyms	Tin,hydroxytrimethyl- (7CI); Trimethyltin hydroxide (6CI);Hydroxytrimethylstannane; Hydroxytrimethyltin; Trimethylhydroxytin;Trimethylstannanol; Trimethylstannyl hydroxide	Article Data	50

Trimethyltin hydroxide Synthetic route

: 27640-06-8
(CH3)3SnCH2C6H4-m-Cl

: 56-24-6
trimethyltin(IV) hydroxide

Conditions

Conditions	Yield
With sodium hydroxide In ethanol; water byproducts: m-chlorotoluene; refluxing for 52 h;;	85%
With NaOH In ethanol; water byproducts: m-chlorotoluene; refluxing for 52 h;;	85%
In methanol; deuteromethanol byproducts: m-chlorotoluene; alkaline decompn. at 50°C;;
In methanol; deuteromethanol byproducts: m-chlorotoluene; alkaline decompn. at 50°C;;

: 1692-18-8
bis(trimethyltin)oxide

: 74-86-2
acetylene

A: 1112-00-1
trimethylstannylacetylene

B: 56-24-6
trimethyltin(IV) hydroxide

Conditions

Conditions	Yield
at 8-12 atm in a sealed tube;;	A 65.5% B n/a

: 697-91-6
2,6-dichloro-1,4-benzoquinone

: 661-69-8
hexamethyldistannane

A: 76279-09-9
C6Cl2H2(OSn(CH3)3)2

B: 56-24-6
trimethyltin(IV) hydroxide

Conditions

Conditions	Yield
In benzene keeping at room temp. (N2) for 4 d; various yields in various conditions; evapn.; elem. anal.;	A 63% B n/a

: 7029-29-0
tris(trimethylstannyl)stibine

A: 1692-18-8
bis(trimethyltin)oxide

B: 68354-51-8
tetrakis(trimethylstannyl)distibane

C: 56-24-6
trimethyltin(IV) hydroxide

Conditions

Conditions	Yield
With oxygen In neat (no solvent) stibane left in air for 3 d; suspending in Ar-satd. acetone, decanting, recrystn. of red residue from toluene (2nd and 3rd product isolated from acetone suspn.); elem. anal.;	A n/a B 47% C n/a

: 16393-88-7
trimethyl(trimethylstannyl)silane

A: 107-46-0
Hexamethyldisiloxane

B: 661-69-8
hexamethyldistannane

C: 1631-73-8
trimethylstannane

D: 56-24-6
trimethyltin(IV) hydroxide

Conditions

Conditions	Yield
With bromobenzene; calcium In water for 1h; Ambient temperature; Further byproducts given;	A 36% B 8% C 42% D 10%

: 16393-88-7
trimethyl(trimethylstannyl)silane

A: 107-46-0
Hexamethyldisiloxane

B: 934-56-5
trimethyl(phenyl)stannane

C: 661-69-8
hexamethyldistannane

D: 1631-73-8
trimethylstannane

E: 56-24-6
trimethyltin(IV) hydroxide

Conditions

Conditions	Yield
With bromobenzene; water; calcium In gas Ca vaporized at 900°C in vac. (ca. 5E-3 Torr), Me3SiSnMe3 introduced as vapor, mixed vapor condensed on cold (77 K) walls, warmed to room temp., excess of C6H5Br admitted as vapor, left to stand for 1 h, hydrolyzed with water; org. layer extd. with ether, products identified by GC-MASS, GLC;	A 36% B 2% C 8% D 42% E 10%

...Expand

: 1066-44-0
trimethyltin bromide

A: 7440-31-5
tin

B: 594-27-4
tetramethylstannane

C: 56-24-6
trimethyltin(IV) hydroxide

Conditions

Conditions	Yield
With zinc In water
With Zn In water

: 1015-53-8
(pentafluorophenyl)trimethyltin

: 56-24-6
trimethyltin(IV) hydroxide

Conditions

Conditions	Yield
With F(1-) or Cl(1-) or CN(1-) In water byproducts: C6F5H;
With F(1-) or Cl(1-) or CN(1-) In ethanol; water byproducts: C6F5H;
With NaF or NaOH In water byproducts: C6HF5;

: 86108-56-7
2-(trimethylstannyl)-1-methylimidazole

A: 616-47-7
1-methyl-1H-imidazole

B: 56-24-6
trimethyltin(IV) hydroxide

Conditions

Conditions	Yield
With water

: 108202-42-2
((methyl)3tin)2C(CON(methyl)2)2

: 56-24-6
trimethyltin(IV) hydroxide

Conditions

Conditions	Yield
With water byproducts: N,N,N',N'-tetramethylmalondiamide; hydrolysis;

Trimethyltin hydroxide Chemical Properties

IUPAC Name: Trimethyl tin hydrate (56-24-6)
Synonyms: Trimethyltin hydrate ; Hydroxytrimethyl-stannan ; Hydroxytrimethylstannane ; Hydroxytrimethyl-ti ; Hydroxytrimethyltin ; Trimethylhydroxytin ; Trimethylstannanol
CAS: 56-24-6
Molecular Formula of Trimethyl tin hydrate (56-24-6): C₃H₁₀OSn
Molecular Weight of Trimethyl tin hydrate (56-24-6) :180.82
Molecular Structure of Trimethyl tin hydrate (56-24-6) :
Mol File: 56-24-6.mol
Flash Point: 25.8 °C
Enthalpy of Vaporization: 41.64 kJ/mol
Boiling Point: 119.1 °C at 760 mmHg
Melting point: 118°C
Vapour Pressure: 7.91 mmHg at 25°C

Trimethyltin hydroxide Toxicity Data With Reference

scu-mus LDLo:1800 µg/kg

JPETAB Journal of Pharmacology and Experimental Therapeutics. 28 (1926),367.

Trimethyltin hydroxide Safety Profile

Risk Statements 20/21/22
20/21/22: Trimethyl tin hydrate (56-24-6) is harmful by inhalation, in contact with skin and if swallowed
Safety Statements 22-36/37/39-45
22: Do not breathe dust
45: In case of accident or if you feel unwell, seek medical advice immediately (show label where possible)
36/37/39: Wear suitable protective clothing, gloves and eye/face protection
RIDADR 3146
HazardClass 6.1
PackingGroup III

Trimethyltin hydroxide Standards and Recommendations

OSHA PEL: TWA 0.1 mg(Sn)/m³ (skin)
ACGIH TLV: TWA 0.1 mg(Sn)/m³; STEL 0.2 mg(Sn)/m³ (skin).
NIOSH REL: (Organotin Compounds) TWA 0.1 mg(Sn)/m³

Trimethyltin hydroxide Analytical Methods

For occupational chemical analysis use NIOSH: Organotin Compounds 5504.

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