Outdoor & Yard / Compounds / Triphenyltin hydroxide

Triphenyltin hydroxide in the yard and garden

Moderate risk for your yard

Safety profile for Triphenyltin hydroxide relevant to people, pets, and pollinators.

What is triphenyltin hydroxide?

The IUPAC name is Triphenylstannane hydroxide.

Also known as: Triphenylstannane hydroxide, Triphenylhydroxytin, Triphenyl tin hydroxide, Fentine.

IUPAC name
Triphenylstannane hydroxide
CAS number
76-87-9
Molecular formula
C18H16OSn
Molecular weight
367.08 g/mol
SMILES
C1=CC=C(C=C1)[Sn+](C2=CC=CC=C2)C3=CC=CC=C3.[OH-]
PubChem CID
9907219

Risk for people, pets,

Moderate risk

Regulatory consensus

2 regulatory and scientific bodies have classified Triphenyltin hydroxide. The classifications differ — that's the data.

AgencyYearClassificationNotes
EPA——
EU——

Regulators apply different standards of evidence — animal-data weighting, exposure-pattern assumptions, epidemiological power thresholds — which is why two scientific bodies can review the same data and reach different conclusions. The disagreement is the data.

Where your yard encounter triphenyltin hydroxide

  • fungicide (restricted use)
  • wood preservative (historical)
  • agricultural pesticide (restricted)

Safer alternatives

Lower-risk approaches that achieve a similar outcome to Triphenyltin hydroxide:

  • Mancozeb (dithiocarbamate fungicide)
    Trade-offs: Contact-only (no systemic). Contains manganese and zinc. Ethylene thiourea metabolite is thyroid disruptor.
    Relative cost: 0.5×

Frequently asked questions

What products contain triphenyltin hydroxide?

Triphenyltin hydroxide appears in: fungicide (restricted use); wood preservative (historical); agricultural pesticide (restricted).

See Triphenyltin hydroxide in the outdoor app

Look up products containing triphenyltin hydroxide, compare to alternatives, and explore the full data record.

Open in outdoor View raw API data

Sources (1)
  1. ATSDR Toxicological Profile — CAS 76-87-9 — reference

Reference data, not professional advice. Aggregates publicly available regulatory and scientific data; not a substitute for veterinary, medical, legal, or regulatory advice. Why we built ALETHEIA →