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CAS 78-78-4

CAS 78-78-4 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 78-78-4
CAS 78-78-4PubChem CID 6556

Isopentane

Isopentane is an alkane that is butane substituted by a methyl group at position 2. It has a role as a refrigerant. — ChEBI

IUPAC name
2-methylbutane
Molecular formula
C5H12
Molecular weight
72.15 g/mol
Exact mass
72.093900383 Da
XLogP3
2.6
Topological polar surface area
0.0 Ų
Hydrogen-bond donors
0
Hydrogen-bond acceptors
0
Covalent units
1
Defined stereocentres
0

Also known as

IsoamylhydrideButane, 2-methyl-iso-Pentane1,1,2-TrimethylethaneDimethylethylmethaneEthyldimethylmethanemethylbutane1,1-dimethylpropane
16 more reported names
iso-C5H12(CH3)2CH-CH2-CH3NSC-119476CHEBI:30362R-601aRefChem:59182-methylbutane;isopentane(CH3)2CHCH2CH3201-142-82-METHYLBUTANE-2-D12-methyl-butane95% isopentane99% isopentaneNSC 119476ISO PENTANEsolvent isopentane
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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 78-78-4

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No records found for this CAS number.

How CAS 78-78-4 is used on this site

CAS 78-78-4 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 78-78-4 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.