Compound record

1,4-dioxane

Also known as NE 220

123-91-1 · candidate list substance

SVHC Candidate ListEU monitoring

Dossier

Identity-first dossier for exact-name, CAS, and use-context lookups.

Lookup labels

NE 220 1,4-DIOXANEDioxanep-Dioxane

Dossier Status Obligations Why Alternatives Changes Similar Sources

CAS 123-91-1

Formula C4H8O2

Molecular weight 88.11 g/mol

InChIKey RYHBNJHYFVUHQT-UHFFFAOYSA-N

Current EU status

Regulatory snapshot for 1,4-dioxane

1,4-dioxane is currently surfaced as candidate list substance in the EU.

The current imported view anchors this substance in CandidateList. The live rationale focuses on Carcinogenic (Article 57a) Equivalent level of concern having probable serious effects to human health (Article 57(f) - human health) Equivalent level of concern having probable serious effects to the environment (Article 57(f) - environment), and this page is designed for fast status checks before deeper source review.

Searchers usually land here for the chemical name, CAS number, abbreviation NE 220, 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

8 Jul 2021latest anchor datelisted, effective, or checked date

Identity

CAS, formula, aliases, and use context

Fast lookup

CAS 123-91-1 · Formula C4H8O2 · Molecular weight 88.11 g/mol · Current status Candidate List substance

If you landed here for formula, molecular weight, or exact substance identity, this block gives the shortest route before you branch into status, obligations, or sources.

CAS: 123-91-1
EC: 204-661-8
Formula: C4H8O2
Molecular weight: 88.11 g/mol
Primary class: candidate list substance
Synonym count: 151

Search-friendly summary

1,4-dioxane (NE 220) , CAS 123-91-1, is tracked here as a monitored substance in the candidate list substance class.

Common names and aliases

1,4-DIOXANEDioxanep-DioxaneDiethylene ether1,4-Diethylene dioxide1,4-Dioxacyclohexane

What to do next

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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

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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

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