Bis(tributyltin) oxide , Analysis standard , 56-35-9
Synonym(s):
Bis[tri-n-butyltin(IV)]oxide;HBD;Hexabutyldistannoxane;TBTO;Tributyltin(IV) oxide
CAS NO.：56-35-9
Empirical Formula: C24H54OSn2
Molecular Weight: 596.1
MDL number: MFCD00009418
EINECS: 200-268-0
PRODUCT Properties
| Melting point: | -45°C |
| Boiling point: | 180 °C2 mm Hg(lit.) |
| Density | 1.17 g/mL at 25 °C(lit.) |
| vapor pressure | <0.01 mm Hg ( 25 °C) |
| refractive index | n |
| Flash point: | >230 °F |
| storage temp. | +4°C |
| solubility | Chloroform (Soluble), Methanol (Slightly) |
| form | liquid |
| color | colorless |
| Specific Gravity | 1.170 |
| Water Solubility | INSOLUBLE |
| Sensitive | Air & Moisture Sensitive |
| Hydrolytic Sensitivity | 5: forms reversible hydrate |
| BRN | 745057 |
| Exposure limits | ACGIH: TWA 0.1 mg/m3; STEL 0.2 mg/m3 (Skin) NIOSH: IDLH 25 mg/m3; TWA 0.1 mg/m3 |
| Stability: | Moisture Sensitive |
| InChIKey | APQHKWPGGHMYKJ-UHFFFAOYSA-N |
| LogP | 3.840 (est) |
| CAS DataBase Reference | 56-35-9(CAS DataBase Reference) |
| NIST Chemistry Reference | Distannoxane, hexabutyl-(56-35-9) |
| EPA Substance Registry System | Bis(tributyltin) oxide (56-35-9) |
Description and Uses
TBTO (bis(tri-n-butyltin)oxide) appears as thin, colourless to pale yellow, flammable and combustible liquid. It is soluble in organic solvents. TBTO, or bis(tri-n-butyltin)oxide, is an organotin compound used as a biocide, fungicide, and molluscicide. Uses of tributyltin also include as an anti-fouling chemical in marine paints for boats, anti-fungal agent in textiles and industrial water systems, in cooling tower and refrigeration water systems, wood pulp preservative in paints and paper mill systems, inner surfaces of cardboard, and in the manufacturing processes of leather goods, textiles, wood, plastics, and mothproof stored garments. In fact, TBT compounds are considered the most hazardous of all tin compounds.
Tributyltin oxide is used as an antifouling and biocide agent against fungi, algae and bacteria in paints and is an irritant.
Safety
| Symbol(GHS) |    GHS06,GHS08,GHS09 |
| Signal word | Danger |
| Hazard statements | H301+H311-H315-H319-H372-H410-H301-H311-H360-H400 |
| Precautionary statements | P273-P309-P310-P501a-P260-P280-P302+P352+P312-P305+P351+P338 |
| Hazard Codes | T,N |
| Risk Statements | 21-25-36/38-48/23/25-50/53 |
| Safety Statements | 35-36/37/39-45-60-61 |
| RIDADR | UN 2788 6.1/PG 2 |
| WGK Germany | 3 |
| RTECS | JN8750000 |
| TSCA | Yes |
| HazardClass | 6.1 |
| PackingGroup | II |
| HS Code | 29310095 |
| Hazardous Substances Data | 56-35-9(Hazardous Substances Data) |
| Toxicity | LD50 oral in rat: 87mg/kg |
