Official EU label nameGlossary entry 28350

T-BUTYL METHYL ETHER

This record confirms an official common ingredient name for EU cosmetic product labelling. It does not by itself confirm that the substance is permitted, unrestricted or safe.

Global evidence snapshot

The resolved identity has matching regulatory evidence in 0 of 13 indexed market datasets: 0 country records and 0 EU Annex records. Every result and evidence gap is listed below.

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Resolved identifiers

Resolved substance identity

CAS:1634-04-4

EC:216-653-1

Ingredient index records:

T-BUTYL METHYL ETHER

Cosmetic functions: SOLVENT

tert-butyl methyl ether

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1 matched or reported name

T-BUTYL METHYL ETHER

Regulatory evidence across markets

None of the 13 markets tracked here holds an imported rule under the name T-BUTYL METHYL ETHER.

That is a statement about this inventory, not about the law: no imported rule is not evidence that a substance is permitted. A rule may exist under a different name, under a CAS or EC number this glossary entry does not carry, or in a dataset not yet imported.

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Chemical identity and properties

PubChem 2D chemical structure for CAS 1634-04-4

CAS 1634-04-4PubChem CID 15413

tert-Butyl methyl ether

Methyl tert-butyl ether (MTBE) is a flammable liquid with a distinctive, disagreeable odor. It is made from blending chemicals such as isobutylene and methanol, and has been used since the 1980s as an additive for unleaded gasolines to achieve more efficient burning.MTBE is also used to dissolve gallstones. Patients treated in this way have MTBE delivered directly to their gall bladders through special tubes that are surgically inserted. — Agency for Toxic Substances and Disease Registry (ATSDR)

IUPAC name: 2-methoxy-2-methylpropane

Molecular formula: C5H12O
Molecular weight: 88.15 g/mol
Exact mass: 88.088815002 Da
XLogP3: 0.9
Topological polar surface area: 9.2 Å²
Hydrogen-bond donors: 0
Hydrogen-bond acceptors: 1
Covalent units: 1
Defined stereocentres: 0

Also known as

Methyl tert-butyl etherMTBEMethyl t-butyl etherPropane, 2-methoxy-2-methyl-T-BUTYL METHYL ETHER2-Methyl-2-methoxypropaneMethyl tertiary-butyl etherEther, tert-butyl methyl

16 more reported names

Methyl 1,1-dimethylethyl ether1,1-dimethylethyl methyl etherCHEBI:2764229I4YB3S89TERT-BUTOXYMETHANEmethyl tert-butyl ether (mtbe)RefChem:8180822-methoxy-2-methyl propane216-653-1Methyl-tert-butyl etherMethyl-t-butyl ethertert-Butylmethyl ethertert-butylmethylether2-methoxy-2-methyl-propanetert-C4H9OCH3methyltert-butyl ether

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External database identifiers

ChEBI:CHEBI:27642
ChEMBL:CHEMBL1452799
EPA DTXSID:DTXSID3020833
PubMed:34121485
PubMed:29553459
PubMed:24128854
PubMed:22942756
PubMed:22833177
PubMed:22793027
PubMed:22783624
PubMed:22771234
PubMed:22767285
PubMed:22727754
PubMed:22717036
PubMed:22707826

Retrieved from NIH PubChem on 2026-08-31 by checksum-valid CAS matching. Chemical properties do not replace the regulatory decision on this page.

Additional authoritative substance research

Each link searches that source for this identity. A link is a research route, not a claim that the source holds an exact record. What each source is, and its legal weight

Cosmetic Ingredient Review safety assessments FDA Global Substance Registration System ILO/WHO International Chemical Safety Cards Japan NITE-CHRIP NIOSH Pocket Guide to Chemical Hazards OECD eChemPortal US EPA CompTox CTX APIs

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Official source and scope

Imported from Commission Implementing Decision (EU) 2025/1175 (dataset version EU 2025/1175). The glossary supplies common ingredient names for the ingredient list required by Article 19(1)(g); it is not an approval or safety list.

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