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CAS 1 record

CAS 51-28-5

CAS 51-28-5 matches 1 EU annex record across Annex II–VI of Regulation 1223/2009.

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Chemical identity and properties

PubChem 2D chemical structure for CAS 51-28-5
CAS 51-28-5PubChem CID 1493

2,4-Dinitrophenol

2,4-dinitrophenol is a dinitrophenol having the nitro groups at the 2- and 4-positions. It has a role as a geroprotector, an antiseptic drug, an allergen, an oxidative phosphorylation inhibitor and a bacterial xenobiotic metabolite. It is a conjugate acid of a 2,4-dinitrophenol(1-). — ChEBI

IUPAC name
2,4-dinitrophenol
Molecular formula
C6H4N2O5
Molecular weight
184.11 g/mol
Exact mass
184.01202123 Da
XLogP3
1.7
Topological polar surface area
112.0 Ų
Hydrogen-bond donors
1
Hydrogen-bond acceptors
5
Covalent units
1
Defined stereocentres
0

Also known as

AldifenNitropheneDinofanPhenol, 2,4-dinitro-Fenoxyl carbon NSolfo Black BTertrosulphur PBRSolfo Black G
16 more reported names
Nitro kleenup1-Hydroxy-2,4-dinitrobenzene2,4-Dnpalpha-DinitrophenolChemox PESolfo Black BBSolfo Black SBDinitrofenoloTertrosulphur Black PBSolfo Black 2B Supra2,4-DinitrofenolMaroxol-50Osmoplastic-ROsmotox-PlusChemoxMitcal
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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 51-28-5

1 total
No records found for this CAS number.

How CAS 51-28-5 is used on this site

CAS 51-28-5 is the Chemical Abstracts Service identifier used to pin this page to a specific substance. In the current dataset, 1 EU annex record shares 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 51-28-5 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.