Dibutyltin dilaurate

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Dibutyltin dilaurate
Other names
3D model (JSmol)
ECHA InfoCard 100.000.946
EC Number
  • 201-039-8
RTECS number
  • WH7000000
UN number 3146
Molar mass 631.56
Appearance colourless liquid
Density 1.066 g/mL
Melting point 22 to 24 °C (72 to 75 °F; 295 to 297 K)
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references

Dibutyltin dilaurate (Abbreviated: DBTDL), also called Dibutyltindilaurate or Butynorate, is an organotin compound that is used as a catalyst. It is a colourless oily liquid. In terms of its structure, the molecule consists of two laurate groups attached to a dibutyltin(IV) center.

The molecular geometry at tin is tetrahedral. Based on the crystal structure of the related bis(bromobenzoate), the carbonyl oxygen centers are weakly bonded to tin.[1]

Together with dibutyltin dioctanoate, DBTDL 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 PVC.[2] It is also added to animal feed to remove cecal worms, roundworms, and tapeworms in turkeys to prevent hexamitosis and coccidiosis.[3]

Related compounds[edit]

Dibutyltin dioctanoate: CAS#4731-77-5 Dibutyltin diacetate: CAS #1067-33-0


  1. ^ Weng Ng, S., Das, V. G. K., Yip, W.-H., Wang, R.-J., Mak, T. C. W., "Di-n-butyltin(IV) di-o-bromobenzoate, a weakly-bridged dimer", Journal of Organometallic Chemistry 1990, volume 393, 201-204. doi:10.1016/0022-328X(90)80199-A
  2. ^ Applications, Environmental Issues, and Analysis in Organotin Chemistry, Second Edition. Alwyn G. Davies 2004 Wiley-VCH Verlag GmbH & Co. KGaA. ISBN 3-527-31023-1
  3. ^ PubChem. "Butynorate". pubchem.ncbi.nlm.nih.gov. Retrieved 2019-08-23.