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 EU status

Regulatory snapshot for Diboron trioxide

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.

Searchers usually land here for the chemical name, CAS number, abbreviation B2O3, and the question of whether the substance is tied to SVHC, REACH, POPs, or SCIP-style compliance work.

Candidate List substancecurrent statuslatest imported framework state

18 Jun 2012latest anchor datelisted, effective, or checked date

Identity

CAS, formula, aliases, and use context

CAS: 1303-86-2
EC: 215-125-8
Formula: B2O3
Molecular weight: 69.63 g/mol
Primary class: candidate list substance
Synonym count: 28

Search-friendly summary

Diboron trioxide (B2O3) , CAS 1303-86-2, is tracked here as a reprotox substance in the candidate list substance class.

Common names and aliases

Boron sesquioxide483W67CPF4Boron OxydatumFused boric acidCaswell No. 109BBoric oxide (B2O3)

What to do next

Use the right route for status, SCIP, and source questions

Status

Current legal state, Candidate List signals, and source-backed rationale

Go here for the framework answer block, listed dates, reasons, and the imported basis for the current EU status.

Obligations

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Use this when the question is operational: SCIP, article communication, threshold review, portfolio screening, or substitute work.

Why monitored

Why this substance is monitored in the EU

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Alternatives

Potential substitutes and nearby molecules

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Changes

What changed over time

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Sources

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Action prompts

Fast compliance and screening routes

Article duties

Check Candidate List threshold and SCIP relevance

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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.