Compound record

Bis(tributyltin) oxide (TBTO)

Also known as HBD

56-35-9 · candidate list substance

SVHC Candidate ListEU monitoring

Status

Current EU framework read, dates, and source-backed status context.

Lookup labels

HBD Tributyltin oxideBIS(TRIBUTYLTIN) OXIDEHexabutyldistannoxane

Dossier Status Obligations Why Alternatives Changes Similar Sources

CAS 56-35-9

Formula C24H54OSn2

Molecular weight 596.1 g/mol

InChIKey APQHKWPGGHMYKJ-UHFFFAOYSA-N

Current status

EU status, SVHC, REACH, and POPs view

Bis(tributyltin) oxide (TBTO) is currently surfaced as candidate list substance in the EU.

The current imported view anchors this substance in CandidateList. The live rationale focuses on PBT (Article 57d), and this page is designed for fast status checks before deeper source review.

This page should answer the direct status question quickly, then show the framework rows that support the answer without forcing the user through a spreadsheet-like table first.

Candidate List substancestatuslatest imported framework state

8 Mar 2026last checkedlatest authority check date captured

Who should care

Article suppliers and importers

Imported rationale

PBT (Article 57d)

What to do next

Operational routes from the current status

Article duties

Check Candidate List threshold and SCIP relevance

Use this when the substance may sit in articles, components, or imported goods and you need to confirm communication and SCIP workflows.

Source check

Verify the legal source before repeating the claim

Every summary should point back to the underlying authority surface. Use the source route when the exact notice, registry entry, or legal text matters.

Imported framework rows

Authority-backed detail

CandidateList 28 Oct 2008

Candidate List substance

PBT (Article 57d)

check article threshold obligations; review SCIP notification relevance

Open official source