Dibutyltin Oxide
Dibutyltin Oxide, with the CAS Registry Number 818-08-6 and synonyms including DBTO, Dibutylstannane oxide, Bis(butyl)tin oxide, and Di-n-butyltin oxide, has a molecular formula of C₈H₁₈OSn and a molecular weight of 248.91 g/mol (EC Number: 212-451-2). It is an industrial-grade product with a purity of ≥98.0%, appearing as a white to off-white crystalline powder with a slight characteristic odor.
Dibutyltin oxide is a versatile organotin compound with wide applications in various industrial fields, mainly including:
●Plastics Industry: Used as a stabilizer and catalyst for PVC (polyvinyl chloride) products, improving the thermal stability and processing performance of PVC, and preventing degradation during high-temperature processing.
●Chemical Synthesis: Serves as a catalyst for esterification, transesterification, and condensation reactions, widely used in the synthesis of esters, resins, and other organic compounds.
●Coating and Adhesive Industry: Acts as a crosslinking agent and catalyst in the production of polyurethane coatings, adhesives, and sealants, enhancing product adhesion and mechanical properties.
●Other Fields: Used in the preparation of other organotin compounds, as well as in the fields of pharmaceuticals, pesticides, and textile auxiliaries.
| Appearance | White to off-white crystalline powder |
| Tin content (Sn), % | 47.5 |
| Chlorine (Cl) content, ppm | ≤300 |
| Tin content (Sn), % | 47.5 |
| Chlorine (Cl) content, ppm | ≤300 |
25kg/drum or according to customer needs.
H302 Harmful if swallowed
H315 Causes skin irritation
H317 May cause an allergic skin reaction
H318 Causes serious eye damage
H341 Suspected of causing genetic defects
H360 May damage fertility or the unborn child
H370 Causes damage to organs
H372 Causes damage to organs through prolonged or repeated exposure
H411 Toxic to aquatic life with long lasting effects
Pictograms
| Signal word | Danger |
| UN number: | 3146 |
| Class: | 6.1 |
| Proper shipping name and description: | ORGANOTIN COMPOUND, SOLID, N.O.S. |
| Chemical name: | Dibutyltin oxide |
Handling Precautions
Handle in a cool, dry, well-ventilated area. Avoid high temperature, direct sunlight, and open flames. Use explosion-proof ventilation systems and equipment.
Wear appropriate personal protective equipment (PPE) during handling, including chemical-resistant gloves, goggles, protective clothing, and a dust mask or respiratory protection to avoid inhalation of dust and direct contact with skin and eyes.
Operate gently to avoid dust generation and splashing. Do not mix with strong acids, strong bases, oxidants, reducing agents, and food-grade materials.
After handling, wash hands, face, and other exposed parts thoroughly with soap and water. Do not eat, drink, or smoke during handling.
Closed operation shall be adopted, and sufficient local exhaust ventilation shall be provided to prevent dust from being released into the workshop air. Operators must receive special training and strictly abide by the operating procedures.
Storage Precautions
Store in a cool, dry, well-ventilated warehouse. The storage temperature should be controlled between 5℃ - 30℃, and the relative humidity should be less than 75%.
Keep the container tightly sealed, and store it in a sealed plastic or glass container to prevent moisture absorption and contamination.
Store separately from strong acids, strong bases, oxidants, reducing agents, food, and food additives, and keep a certain distance between them to avoid chemical reactions.
Mark the storage area clearly with hazard signs (toxic, irritating, environmental hazard). Equip with appropriate emergency materials (such as absorbent materials, first aid kits).
Shelf life: 12 months from the date of production when stored in sealed and proper conditions. If the product exceeds the shelf life, it can be used only after passing the re-inspection.
Do not store in a place accessible to children and irrelevant personnel. Store locked up.
