Bis(tributyltin) oxide
Pharmaceutical Materials 2025-03-02
CAS Number: 56-35-9
Molecular Formula: C24H54OSn2
Molecular Weight: 596.1
Appearance: Colorless to off-white oil
Melting Point: -45°C
Boiling Point: 180°C at 2 mmHg
Usage: Used as a fungicide, molluscicide, and formerly in marine antifouling paints.
| Attribute | Details |
|---|---|
| Chemical Name | Bis(tributyltin) oxide |
| Synonyms | Bis(tri-n-butyltin) oxide; 5.5.7.7-Tetrabutyl-6-oxa-5.7-distannaundecane; Aceto TBTO; BioMeT 66; etc. (numerous synonyms exist) |
| CAS Number | 56-35-9 |
| Molecular Formula | C24H54OSn2 |
| Molecular Weight | 596.1 g/mol |
| Appearance | Colorless to off-white oil or slightly yellow liquid |
| Density | Approximately 1.14 g/cm³ |
| Boiling Point | Not available (high molecular weight and tin-oxygen bonding) |
| Solubility | Slightly soluble in chloroform and methanol; insoluble in water but soluble in most organic solvents |
| Chemical Properties | Organotin compound with oxidative properties. Can be used as a metal-organic synthesis reagent. Reacts with bromine reagents to promote the oxidation of alcohols and sulfides. |
| Applications | Historically used as a fungicide, molluscicide, and as an active component in marine antifouling paints. Now restricted due to toxicity and marine pollution concerns. Also used in the synthesis of organic tin polymers and as a catalyst in polymerization reactions. |
| Toxicity | Considered toxic and a severe marine pollutant. Exhibits neurotoxicity and can bioaccumulate in aquatic organisms, affecting the entire food chain. |
| Safety Precautions | Handle with caution. Avoid contact with skin and eyes. Wear suitable protective clothing, gloves, and eye protection. Store in a cool, dry place, away from oxidizing agents and sources of ignition. Follow local regulations for the disposal of hazardous waste. |
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