Compound record

Diboron trioxide

Also known as B2O3

1303-86-2 · candidate list substance · reprotox

B2O3 SVHC Candidate ListEU monitoringreprotox Boron sesquioxide483W67CPF4Boron Oxydatum

Dossier Status Obligations Why Alternatives Changes Similar Sources

CAS 1303-86-2

Formula B2O3

Molecular weight 69.63 g/mol

InChIKey RPPTVYMVSNHGRG-UHFFFAOYSA-N

Current status

EU status, SVHC, REACH, and POPs view

Diboron trioxide is currently surfaced as candidate list substance in the EU.

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

This page is meant to answer the direct search query about EU status before you branch into obligations, SCIP, or source verification.

Candidate List substancestatuslatest imported framework state

8 Mar 2026last checkedlatest authority check date captured

Who should care

Article suppliers and importerswatch

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

Framework	Status	Listed	Effective	Reason	Obligations	Source
CandidateList	Candidate List substance	18 Jun 2012	Unspecified	Toxic for reproduction (Article 57c)	check article threshold obligations; review SCIP notification relevance	Candidate List entry - Diboron trioxide