5,8-dihydroxy-1,4-naphthoquinone

Also known as: naphthazarin, 1,4-naphthalenedione, 5,8-dihydroxy-, 5,8-dihydroxy-1,4-naphthalenedione, 5,8-dihydroxynaphthalene-1,4-dione, 5,8-dihydroxynaphthoquinone

5,8-dihydroxy-1,4-naphthoquinone (CAS 475-38-7) is a compound in the Ketones category listed in the Jingsj chemical database. It has the molecular formula C10H6O4 and a molecular weight of 190.15200 g/mol. Key properties include a melting point of 220-230 °C(lit.), a boiling point of 498.2ºC at 760mmHg, a density of 1.592g/cm3 and a flash point of 269.2ºC. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 475-38-7
Jingsj CID: J-15433-6
Molecular Formula: C₁₀H₆O₄
Molecular Weight: 190.15200 g/mol
Category: Ketones
Last updated: 8/21/2026

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Physicochemical Properties

Melting Point	220-230 °C(lit.)
Boiling Point	498.2ºC at 760mmHg
Density	1.592g/cm3
Flash Point	269.2ºC
Exact Mass	190.02700
PSA	74.60000
LogP	1.03300
Vapor Pressure	1.51E-10mmHg at 25°C
Refractive Index	1.71

Activity & Biological Data

Additional Information	[1]. Seon Young Choi, et al. Naphthazarin has a protective effect on the 1-methyl-4-phenyl-1,2,3,4-tetrahydropyridine-induced Parkinson's disease model. J Neurosci Res. 2012 Sep;90(9):1842-9. [2]. Omar Aljanadi, et al. Stimulation of Suicidal Erythrocyte Death by Naphthazarin. Basic Clin Pharmacol Toxicol. 2015 Dec;117(6):369-74.

Customs & Trade Information

HS Code	2914690090
Summary	2914690090 other quinones。Supervision conditions:None。VAT:17.0%。Tax rebate rate:9.0%。MFN tariff:5.5%。General tariff:30.0%

Frequently Asked Questions

What is the CAS number of 5,8-dihydroxy-1,4-naphthoquinone?

The CAS number of 5,8-dihydroxy-1,4-naphthoquinone is 475-38-7.

What are the molecular formula and molecular weight of 5,8-dihydroxy-1,4-naphthoquinone?

5,8-dihydroxy-1,4-naphthoquinone has molecular formula C10H6O4 and molecular weight 190.15200 g/mol.

What are the upstream and downstream products of 5,8-dihydroxy-1,4-naphthoquinone?

For 5,8-dihydroxy-1,4-naphthoquinone, Upstream Products: Maleic anhydride, Hydroquinone; Downstream Products: Quinizarin.

Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.

Last updated: 8/21/2026

How to cite: Jingsj. "5,8-dihydroxy-1,4-naphthoquinone (CAS 475-38-7)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-15433-6 (accessed 2026-11-06).

Data for reference only; verify product details with suppliers before purchase.