(S)-Equol

Also known as: (-)-Equol, (3S)-3-(4-Hydroxyphenyl)chroman-7-ol, 4',7-Dihydroxyisoflavan, 4',7-Isoflavandiol, MFCD00200962

(S)-Equol (CAS 531-95-3) is a compound in the Alcohols category listed in the Jingsj chemical database. It has the molecular formula C15H14O3 and a molecular weight of 242.270 g/mol. Key properties include a melting point of 189-190ºC, a boiling point of 441.7±45.0 °C at 760 mmHg, a density of 1.3±0.1 g/cm3 and a flash point of 220.9±28.7 °C. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 531-95-3
Jingsj CID: J-1963047-8
Molecular Formula: C₁₅H₁₄O₃
Molecular Weight: 242.270 g/mol
Category: Alcohols
Last updated: 8/21/2026

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Physicochemical Properties

Melting Point	189-190ºC
Boiling Point	441.7±45.0 °C at 760 mmHg
Density	1.3±0.1 g/cm3
Flash Point	220.9±28.7 °C
Exact Mass	242.094299
PSA	49.69000
LogP	2.98
Vapor Pressure	0.0±1.1 mmHg at 25°C
Refractive Index	1.645
Storage Conditions	-20°C Freezer

Activity & Biological Data

Target	Human Endogenous Metabolite
Additional Information	[1]. Setchell KD, et al. S-equol, a potent ligand for estrogen receptor beta, is the exclusive enantiomeric form of the soy isoflavone metabolite produced by human intestinal bacterial flora. Am J Clin Nutr. 2005 May;81(5):1072-9. [2]. Lu Z, et al. S-equol, a Secondary Metabolite of Natural Anticancer Isoflavone Daidzein, Inhibits Prostate Cancer Growth In Vitro and In Vivo, Though Activating the Akt/FOXO3a Pathway. Curr Cancer Drug Targets. 2016;16(5):455-65. [3]. Horiuchi H, et al. S-equol nantioselectively activates cAMP-protein kinase A signaling and reduces alloxan-induced cell death in INS-1 pancreatic β-cells. J Nutr Sci Vitaminol (Tokyo). 2014;60(4):291-6.

Target

Human Endogenous Metabolite

Additional Information

[1]. Setchell KD, et al. S-equol, a potent ligand for estrogen receptor beta, is the exclusive enantiomeric form of the soy isoflavone metabolite produced by human intestinal bacterial flora. Am J Clin Nutr. 2005 May;81(5):1072-9. [2]. Lu Z, et al. S-equol, a Secondary Metabolite of Natural Anticancer Isoflavone Daidzein, Inhibits Prostate Cancer Growth In Vitro and In Vivo, Though Activating the Akt/FOXO3a Pathway. Curr Cancer Drug Targets. 2016;16(5):455-65. [3]. Horiuchi H, et al. S-equol nantioselectively activates cAMP-protein kinase A signaling and reduces alloxan-induced cell death in INS-1 pancreatic β-cells. J Nutr Sci Vitaminol (Tokyo). 2014;60(4):291-6.

Customs & Trade Information

HS Code	2932999099
Summary	2932999099. other heterocyclic compounds with oxygen hetero-atom(s) only. VAT:17.0%. Tax rebate rate:13.0%. . MFN tariff:6.5%. General tariff:20.0%

Frequently Asked Questions

What is the CAS number of (S)-Equol?

The CAS number of (S)-Equol is 531-95-3.

What are the molecular formula and molecular weight of (S)-Equol?

(S)-Equol has molecular formula C15H14O3 and molecular weight 242.270 g/mol.

What are the upstream and downstream products of (S)-Equol?

For (S)-Equol, Upstream Products: Daidzein, Formononetin, Dihydrodaidzein; Downstream Products: Daidzein.

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. "(S)-Equol (CAS 531-95-3)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1963047-8 (accessed 2026-11-09).

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