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CAS 1634-04-4

CAS 1634-04-4 matches 0 EU annex records across Annex II–VI of Regulation 1223/2009.

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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 Ų
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
Open full PubChem recordPubChem annotations3D structure image
External database identifiers

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

Records for CAS 1634-04-4

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How CAS 1634-04-4 is used on this site

CAS 1634-04-4 is the Chemical Abstracts Service identifier used to pin this page to a specific substance. In the current dataset, 0 EU annex records share this identifier, which helps you cross-check whether the same substance appears under one regulatory context or several.

Use this page when a supplier specification, SDS or raw-material dossier gives you CAS 1634-04-4 and you need to see every linked Annex II–VI record in one place. The entry cards above are the quickest route to concentration limits, warnings, annex placement and product-type conditions.