Ingredient Dictionary

LAWSONE

Lawsone is 1,4-Naphthoquinone carrying a hydroxy function at C-2.

Definition

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.

Source: PubChem

US FDA substance register · UNII TLH4A6LV1W · registered name LAWSONE · single chemical substance

Source: US FDA Unique Ingredient Identifier (UNII)

Cosmetic roles

Dyes hairHAIR DYEING

Safety & regulatory references

Other restriction: ban substances that deplete the ozone layer · SCCS opinion: Opinion on Lawson; Opinion on Lawsone

Source: EU CosIng ingredient list

More data — names, identifiers, properties, test records, literature

Official labels & definitions

JCIA labelling name ラウソン: 本品は、次の化学式で表される置換ナフトキノンである。

Source: JCIA labelling names (Japan)

Names & identifiers

LAWSONEINCI1,4-Naphthalenedione, 2-hydroxy-SynonymラウソンJapanese labelling name

CAS No.chemical registry number: 83-72-7
EC No.EU chemical inventory number: 201-496-3
DTXSIDUS EPA chemical ID: DTXSID2025428
DTXCIDUS EPA compound ID: DTXCID105428

IUPAC: 2-Hydroxynaphthalene-1,4-dione
Molecular formula: C10H6O3
Molecular weight: 174.155 g/mol

What products actually use it for

What the 1 products reported to the US EPA with this ingredient use it for. Products outside cosmetics are included, so the top few rows are its main uses.

Dye1

Source: US EPA CompTox dashboard