1,2-Naphthoquinone

Also known as: 1,2-NAPHTHALENEDIONE, 1,2-Naftochinon, 1,2-Naphthalenedione, 1,2-Naphthaquinone, 1,2-dihydro-1,2-diketo-naphthalene, BETA-NAPHTHOQUINONE, Dapoxetine Impurity S, EINECS 208-360-2, MFCD00001698, NAPHTHOQUINONE, 1,2-, o-Naphthoquinone

1,2-Naphthoquinone (CAS 524-42-5) is a compound in the Ketones category listed in the Jingsj chemical database. It has the molecular formula C10H6O2 and a molecular weight of 158.15300 g/mol. Key properties include a melting point of 139-142 °C (dec.)(lit.), a density of 1.29g/cm3 and a flash point of 117.4ºC. It is classified under GHS with signal word Warning and hazard statements H302 — Harmful if swallowed, H315 — Causes skin irritation and H319 — Causes serious eye irritation. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 524-42-5
Jingsj CID: J-958307-7
Molecular Formula: C₁₀H₆O₂
Molecular Weight: 158.15300 g/mol
Category: Ketones
Last updated: 8/21/2026

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Physicochemical Properties

Melting Point	139-142 °C (dec.)(lit.)
Density	1.29g/cm3
Flash Point	117.4ºC
Exact Mass	158.03700
PSA	34.14000
LogP	1.46520
Refractive Index	1.617

GHS Safety & Compliance

IrritantSignal word: Warning

H302 — Harmful if swallowed
H315 — Causes skin irritation
H319 — Causes serious eye irritation
H335 — May cause respiratory irritation

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 1,2-Naphthoquinone?

The CAS number of 1,2-Naphthoquinone is 524-42-5.

What are the molecular formula and molecular weight of 1,2-Naphthoquinone?

1,2-Naphthoquinone has molecular formula C10H6O2 and molecular weight 158.15300 g/mol.

Is 1,2-Naphthoquinone hazardous?

1,2-Naphthoquinone has GHS signal word Warning and hazard statements H302 — Harmful if swallowed; H315 — Causes skin irritation; H319 — Causes serious eye irritation.

What are the upstream and downstream products of 1,2-Naphthoquinone?

For 1,2-Naphthoquinone, Upstream Products: 1,2-Naphthalenediol, 1-Naphthol, 1-Amino-2-naphthol; Downstream Products: 1H-Inden-1-one, 2-Nitro-1-naphthol, Benz(a)anthracene.

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. "1,2-Naphthoquinone (CAS 524-42-5)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-958307-7 (accessed 2026-11-09).

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