Dibutyltin Dilaurate (DBTDL)CAS 77-58-7
The most common organotin catalyst in polyurethane chemistry and PVC heat stabilization.
Toxic Chemical Databases
Substance-specific listings — these flags are for Dibutyltin Dilaurate alone, not for the broader family.
Chemical Type
Dialkyltin Catalyst & Stabilizer
Chemical Description
DBTDL is the standard catalyst for many polyurethane reactions including some silicone-cure systems and PVC heat stabilization. The dibutyltin core shows reproductive and developmental toxicity in animal studies and immune-system effects in occupationally-exposed worker cohorts. EU REACH Authorisation list candidate based on endocrine-disruption and reproductive concerns.
Biological Activity
Severity scores specific to this substance, NOT the parent family average. Differences between siblings are real and meaningful.
Top Health Consequences
- Reproductive and developmental toxicity in animal models
- Immune system effects in worker cohorts
- Skin sensitization on direct contact
- Migration from PVC into surrounding house dust
Pathways of Exposure
- Skin contact during PU sealant and silicone cure
- Off-gassing from freshly-installed polyurethane systems
- House dust from PVC products using DBTDL as stabilizer
Building Materials with Dibutyltin Dilaurate
Listed alphabetically — product categories where this specific substance appears.
Moisture-Cure Silicone Sealants
Polyurethane Catalyst-Containing Adhesives
PVC Pipe & Sheet Stabilizers
How We Keep Dibutyltin Dilaurate Out of a House
Dibutyltin Dilaurate is on our avoid list, which means it is specified out of the project before bidding — not caught on site. Keeping chemistry like this out of the house is the practical difference between a healthy home and an ordinary one.
If you want a house specified this way from the start, or an existing house assessed for what is already in it, that is the work we do. Earth Bound Homes builds in Menlo Park, Redwood City, San Mateo County and across the San Francisco Bay Area.