Английская Википедия:Dibutyltin dilaurate
Dibutyltin dilaurate (abbreviated DBTDL) is an organotin compound with the formula Шаблон:Chem2. It is a colorless viscous and oily liquid. It is used as a catalyst .
Description
In terms of its structure, the molecule of dibutyltin dilaurate consists of two laurate groups and two butyl groups attached to a tin(IV) atom. The molecular geometry at tin is tetrahedral. Based on the crystal structure of the related bis(bromobenzoate), the oxygen atoms of the carbonyl groups are weakly bonded to tin atom.[1]
Decomposition
Upon heating to decomposition temperature (which is above 250 °C[2]), dibutyltin dilaurate emits acrid smoke and fumes.[3]
Uses
Dibutyltin dilaurate is used as a paint additive.[3] Together with dibutyltin dioctanoate, dibutyltin dilaurate is used as a catalyst for polyurethane production from isocyanates and diols. It is also useful as a catalyst for transesterification and for the room temperature vulcanization of silicones. It is also used as a stabilizer in polyvinyl chloride,[4][3] vinyl ester resins, lacquers, and elastomers.[3] It is also added to animal feed to remove cecal worms, roundworms, and tapeworms in chickens and turkeys and to prevent or provide treatment against hexamitosis and coccidiosis.[5]
Hazards and toxicity
Dibutyltin dilaurate can be absorbed through the skin. It irritates skin and eyes (causes redness of skin and eyes). It is a neurotoxin. It can cause injuries to the liver, kidneys, and gastrointestinal tract. The symptoms of poisoning with dibutyltin dilaurate include nausea, headache, muscular weakness and even paralysis. Dibutyltin dilaurate is combustible.[3] Its vapor is denser than air (21.8 times denser than air[3]), so it can spread on the floors, forming explosive mixtures with air. On fire, it emits irritating and toxic fumes and smoke which contain tin, tin oxides and carbon oxides.[2] Dibutyltin dilaurate is very reactive with acids and oxidizers.[3]
Related compounds
- Dibutyltin dioctanoate: CAS#4731-77-5
- Dibutyltin diacetate: CAS #1067-33-0
References
- ↑ Шаблон:Cite journal
- ↑ 2,0 2,1 Ошибка цитирования Неверный тег
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не указан текст - ↑ 3,0 3,1 3,2 3,3 3,4 3,5 3,6 Ошибка цитирования Неверный тег
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не указан текст - ↑ Шаблон:Cite book
- ↑ Шаблон:Cite web