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CAS 83-72-7

CAS 83-72-7 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 83-72-7
CAS 83-72-7PubChem CID 6755

2-Hydroxy-1,4-naphthoquinone

Lawsone is 1,4-Naphthoquinone carrying a hydroxy function at C-2. It is obtained from the leaves of Lawsonia inermis. It has a role as an antifungal agent and a protective agent. It is a tautomer of a naphthalene-1,2,4-trione. — ChEBI

IUPAC name
4-hydroxynaphthalene-1,2-dione
Molecular formula
C10H6O3
Molecular weight
174.15 g/mol
Exact mass
174.031694049 Da
XLogP3
0.9
Topological polar surface area
54.4 Ų
Hydrogen-bond donors
1
Hydrogen-bond acceptors
3
Covalent units
1
Defined stereocentres
0

Also known as

Lawsone2-hydroxynaphthalene-1,4-dione2-Hydroxy-1,4-naphoquinone2-HydroxynaphthoquinoneHennaMehendiHANANatural Orange 6
16 more reported names
LawsonMendi1,4-Naphthalenedione, 2-hydroxy-2-Hydroxy-1,4-naphthalenedioneC.I. Natural Orange 61,4-Naphthoquinone, 2-hydroxy-C.I. 75480NSC 86252-HYDROXY-1,4-NAPTHOQUINONENSC 272852-hydroxy-1,4-dihydronaphthalene-1,4-dioneNSC-8625TLH4A6LV1WCHEBI:444012-hydroxy-naphthalene-1,4-dioneNSC8625
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External database identifiers

Retrieved from NIH PubChem on 2026-09-02 by checksum-valid CAS matching. Chemical properties do not replace the regulatory decision on this page.

Records for CAS 83-72-7

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How CAS 83-72-7 is used on this site

CAS 83-72-7 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 83-72-7 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.