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3,9-Di-O-methylcoumestrol

Also known as: Coumestrol dimethyl ether, 3,9-Dimethoxy-6H-benzofuro[3,2-c][1]benzopyran-6-one, 3,9-Dimethoxybenzofuro[3,2-c]chromen-6-one, 7,12-Dimethoxycoumestan, 7,4'-di-O-methylcoumestrol, Di-O-methylcoumestrol, Aurora KA-4773

3,9-Di-O-methylcoumestrol (CAS 3172-99-4) is a compound in the Esters category listed in the Jingsj chemical database. It has the molecular formula C17H12O5 and a molecular weight of 296.27400 g/mol. Key properties include a boiling point of 486.1ºC at 760 mmHg, a density of 1.355g/cm3 and a flash point of 247.8ºC. It is classified under GHS with signal word Warning and hazard statements H302 — Harmful if swallowed. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.
3172-99-4
Jingsj CID
J-1504562-3
Molecular Formula
C17H12O5
Molecular Weight
296.27400 g/mol
Category
Esters
Last updated
8/21/2026
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Physicochemical Properties

Boiling Point486.1ºC at 760 mmHg
Density1.355g/cm3
Flash Point247.8ºC
Exact Mass296.06800
PSA61.81000
LogP3.70960
Refractive Index1.643

GHS Safety & Compliance

IrritantSignal word: Warning
  • H302 — Harmful if swallowed

Customs & Trade Information

HS Code2932999099
Summary2932999099. 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 3,9-Di-O-methylcoumestrol?

The CAS number of 3,9-Di-O-methylcoumestrol is 3172-99-4.

What are the molecular formula and molecular weight of 3,9-Di-O-methylcoumestrol?

3,9-Di-O-methylcoumestrol has molecular formula C17H12O5 and molecular weight 296.27400 g/mol.

Is 3,9-Di-O-methylcoumestrol hazardous?

3,9-Di-O-methylcoumestrol has GHS signal word Warning and hazard statements H302 — Harmful if swallowed.

What are the upstream and downstream products of 3,9-Di-O-methylcoumestrol?

For 3,9-Di-O-methylcoumestrol, Upstream Products: 4-Hydroxy-7-methoxycoumarin, 1,3-Dimethoxybenzene, Diazomethane; Downstream Products: Coumestrol.

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

Last updated:

How to cite: Jingsj. "3,9-Di-O-methylcoumestrol (CAS 3172-99-4)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1504562-3 (accessed 2026-11-06).

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