Tributyltin Hydride Property

Melting point:

<0°C

Boiling point:

80 °C0.4 mm Hg(lit.)

Density 

1.082 g/mL at 25 °C(lit.)

vapor pressure 

5 hPa (20 °C)

refractive index 

n20/D 1.473(lit.)

Flash point:

104 °F

storage temp. 

Store below +30°C.

form 

liquid

color 

colorless

Specific Gravity

1.103 (20℃)

Water Solubility 

REACTS

Sensitive 

Air & Moisture Sensitive

Hydrolytic Sensitivity

7: reacts slowly with moisture/water

BRN 

3587329

Exposure limits

ACGIH: TWA 0.1 mg/m3; STEL 0.2 mg/m3 (Skin)
NIOSH: IDLH 25 mg/m3; TWA 0.1 mg/m3

CAS DataBase Reference

688-73-3(CAS DataBase Reference)

NIST Chemistry Reference

Tri-n-butyltin hydride(688-73-3)

EPA Substance Registry System

Tributyltin (688-73-3)

Safety

Hazard Codes 

T,N,F

Risk Statements 

10-21-25-36/38-48/23/25-50/53-15-67-65-11

Safety Statements 

35-36/37/39-45-60-61-62-36/37-33-26-16

RIDADR 

UN 1993 3/PG 3

WGK Germany 

3

RTECS 

WH8675000

F 

1-10

Autoignition Temperature

>250 °C

TSCA 

Yes

HazardClass 

6.1

PackingGroup 

II

HS Code 

29310095

Hazardous Substances Data

688-73-3(Hazardous Substances Data)

Hazard and Precautionary Statements (GHS)

Symbol(GHS)

Signal word

Danger

Hazard statements

H226Flammable liquid and vapour

H301Toxic if swalloed

H312Harmful in contact with skin

H315Causes skin irritation

H319Causes serious eye irritation

H372Causes damage to organs through prolonged or repeated exposure

H410Very toxic to aquatic life with long lasting effects

Precautionary statements

P210Keep away from heat/sparks/open flames/hot surfaces. — No smoking.

P273Avoid release to the environment.

P280Wear protective gloves/protective clothing/eye protection/face protection.

P301+P310IF SWALLOWED: Immediately call a POISON CENTER or doctor/physician.

P303+P361+P353IF ON SKIN (or hair): Remove/Take off Immediately all contaminated clothing. Rinse SKIN with water/shower.

P305+P351+P338IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.

Tributyltin Hydride Chemical Properties,Usage,Production

Uses

Chemical Properties

clear colourless liquid

Uses

A widely used radical reagent used in reductive cleavage,1 radical dehalogenation, and intramolecular radical cyclization.2

Uses

Tributyltin hydride the most commonly used tin hydride，it is less toxic than the more volatile trierhyl and trimethyl analogues, and it is therefore the most widely used organostannane.
Tributyltin hydride, the reagent of choice for generating alkyl radical, is also widely used in aryl radical cyclization. Other reagents developed for this purpose include samarium diiodide, palladium reagents organosilanes as well as manganese triacetate and transition metals for carbocyclization.

Uses

Tributyltin hydride is used to effect carbon—carbon bond formation with the displacement of halide from a suitably oriented haloalkyl group.

Application

Has been reviewed. Catalyzes the Si-H reduction of α,β-unsaturated ketones. Useful in the reductive amination of ketones and aldehydes to form 3° amines.

Hazard

Moderately toxic by inhalation.

Safety Profile

Moderately toxic by inhalation. When heated to decomposition it emits acrid smoke and irritating fumes. See also TIN COMPOUNDS.

Purification Methods

Dissolve it in Et2O, add quinol (500mg for 300mL, to stabilize it), dry over Na2SO4, filter, evaporate and distil it under dry N2. It is a clear liquid if dry and decomposes very slowly. In the presence of H2O, traces of tributyl tin hydroxide are formed in a few days. Store it in sealed glass ampoules in small aliquots. It is estimated by reaction with aqueous NaOH when H2 is liberated. CARE: stored samples may be under pressure due to liberated H2. [Van Der Kerk et al. J Appl Chem 7 366 1937, Ono et al. Tetrahedron 41 4013 1985, Neuman Synthesis 665 1987, Curran Synthesis 417 1988, Beilstein 4 IV 4312.]