Английская Википедия:Dibutyltin dilaurate

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Шаблон:Chembox

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

References

  1. Шаблон:Cite journal
  2. 2,0 2,1 Ошибка цитирования Неверный тег <ref>; для сносок sigmaaldrich не указан текст
  3. 3,0 3,1 3,2 3,3 3,4 3,5 3,6 Ошибка цитирования Неверный тег <ref>; для сносок pubchem не указан текст
  4. Шаблон:Cite book
  5. Шаблон:Cite web