(4S)-4,9-dihydroxy-2,2-dimethyl-3,4-dihydro-2H-benzo[g]chromene-5,10-dione

4,9-二羟基-α-拉帕醌

Also known as: 4,9-Dihydroxy-α-lapachone, (+)-4,9-Dihydroxy-α-lapachone, 4,9-Dihydroxy-alpha-lapachone, 2H-Naphtho[2,3-b]pyran-5,10-dione, 3,4-dihydro-4,9-dihydroxy-2,2-dimethyl-, (4S)-, [S,(+)]-3,4-Dihydro-4,9-dihydroxy-2,2-dimethyl-2H-naphtho[2,3-b]pyran-5,10-dione, 9-Dihydroxy-α-lapachone

(4S)-4,9-dihydroxy-2,2-dimethyl-3,4-dihydro-2H-benzo[g]chromene-5,10-dione (CAS 56473-67-7) is a compound in the Ketones category listed in the Jingsj chemical database. It has the molecular formula C15H14O5 and a molecular weight of 274.27 g/mol. It is also known as 4,9-Dihydroxy-α-lapachone, (+)-4,9-Dihydroxy-α-lapachone and 4,9-Dihydroxy-alpha-lapachone. Key properties include a boiling point of 495.3±45.0 °C at 760 mmHg, a density of 1.5±0.1 g/cm3 and a flash point of 190.0±22.2 °C. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 56473-67-7
Jingsj CID: J-1971195-3
Molecular Formula: C₁₅H₁₄O₅
Chinese Name: 4,9-二羟基-α-拉帕醌
Molecular Weight: 274.27 g/mol
Category: Ketones
Last updated: 8/21/2026

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Physicochemical Properties

Boiling Point	495.3±45.0 °C at 760 mmHg
Density	1.5±0.1 g/cm3
Flash Point	190.0±22.2 °C

Frequently Asked Questions

What is the CAS number of (4S)-4,9-dihydroxy-2,2-dimethyl-3,4-dihydro-2H-benzo[g]chromene-5,10-dione?

The CAS number of (4S)-4,9-dihydroxy-2,2-dimethyl-3,4-dihydro-2H-benzo[g]chromene-5,10-dione is 56473-67-7.

What are the molecular formula and molecular weight of (4S)-4,9-dihydroxy-2,2-dimethyl-3,4-dihydro-2H-benzo[g]chromene-5,10-dione?

(4S)-4,9-dihydroxy-2,2-dimethyl-3,4-dihydro-2H-benzo[g]chromene-5,10-dione has molecular formula C15H14O5 and molecular weight 274.27 g/mol.

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

Last updated: 8/21/2026

How to cite: Jingsj. "(4S)-4,9-dihydroxy-2,2-dimethyl-3,4-dihydro-2H-benzo[g]chromene-5,10-dione (CAS 56473-67-7)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1971195-3 (accessed 2026-10-25).

Data for reference only; verify specifications, grades and regulatory status with suppliers before purchase.