9,10-Dihydrobenzo[a]pyren-7(8H)-one

Also known as: 7-Oxo-7,8,9,10-tetrahydrobenzo[a]pyrene, 7,8,9,10-Tetrahydrobenzo[a]pyren-7-one, 9,10-Dihydro-8H-benzo[def]chrysen-7-one, Benzo[a]pyren-7(8H)-one, 9,10-dihydro-, NSC 30830

9,10-Dihydrobenzo[a]pyren-7(8H)-one (CAS 3331-46-2) is a compound in the Ketones category listed in the Jingsj chemical database. It has the molecular formula C20H14O and a molecular weight of 270.325 g/mol. Key properties include a melting point of 172-175ºC, a boiling point of 492.0±15.0 °C at 760 mmHg, a density of 1.3±0.1 g/cm3 and a flash point of 220.6±15.3 °C. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 3331-46-2
Jingsj CID: J-20095-3
Molecular Formula: C₂₀H₁₄O
Molecular Weight: 270.325 g/mol
Category: Ketones
Last updated: 8/21/2026

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Physicochemical Properties

Melting Point	172-175ºC
Boiling Point	492.0±15.0 °C at 760 mmHg
Density	1.3±0.1 g/cm3
Flash Point	220.6±15.3 °C
Exact Mass	270.104462
PSA	17.07000
LogP	5.57
Vapor Pressure	0.0±1.2 mmHg at 25°C
Refractive Index	1.820

Customs & Trade Information

HS Code	2914399090
Summary	2914399090. other aromatic ketones without other oxygen function. VAT:17.0%. Tax rebate rate:13.0%. . MFN tariff:5.5%. General tariff:30.0%

Frequently Asked Questions

What is the CAS number of 9,10-Dihydrobenzo[a]pyren-7(8H)-one?

The CAS number of 9,10-Dihydrobenzo[a]pyren-7(8H)-one is 3331-46-2.

What are the molecular formula and molecular weight of 9,10-Dihydrobenzo[a]pyren-7(8H)-one?

9,10-Dihydrobenzo[a]pyren-7(8H)-one has molecular formula C20H14O and molecular weight 270.325 g/mol.

What are the upstream and downstream products of 9,10-Dihydrobenzo[a]pyren-7(8H)-one?

For 9,10-Dihydrobenzo[a]pyren-7(8H)-one, Upstream Products: 1-Pyrenebutyric acid, 1-Pyreneacetic acid, Pyrene; Downstream Products: Benzo(a)pyrene, 7,8,9,10-tetrahydrobenzo[a]pyren-7-ol.

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. "9,10-Dihydrobenzo[a]pyren-7(8H)-one (CAS 3331-46-2)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-20095-3 (accessed 2026-11-09).

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