Quinestrol

Also known as: 17α-Ethynylestradiol 3-cyclopentyl ether, 17α-Ethinylestradiol 3-cyclopentyl ether, 17α-Ethynyl-1,3,5(10)-estratriene-3,17β-diol 3-cyclopentyl ether, EECPE, Eston, W-3566, 3-(Cyclopentyloxy)-19-norpregna-1,3,5(10)-trien-20-yn-17-ol, (8R,9S,13S,14S,17R)-3-(cyclopentyloxy)-17-ethynyl-13-methyl-7,8,9,11,12,13,14,15,16,17-decahydro-6H-cyclopenta[a]phenanthren-17-ol

Quinestrol (CAS 152-43-2) is a compound in the Alcohols category listed in the Jingsj chemical database. It has the molecular formula C25H32O2 and a molecular weight of 364.520 g/mol. Key properties include a melting point of 107 - 108ºC, a boiling point of 502.5±50.0 °C at 760 mmHg, a density of 1.2±0.1 g/cm3 and a flash point of 218.8±24.4 °C. It is classified under GHS with signal word Danger and hazard statements H302 — Harmful if swallowed, H312 — Harmful in contact with skin and H332 — Harmful if inhaled. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 152-43-2
Jingsj CID: J-47479-1
Molecular Formula: C₂₅H₃₂O₂
Molecular Weight: 364.520 g/mol
Category: Alcohols
Last updated: 8/21/2026

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Physicochemical Properties

Melting Point	107 - 108ºC
Boiling Point	502.5±50.0 °C at 760 mmHg
Density	1.2±0.1 g/cm3
Flash Point	218.8±24.4 °C
Exact Mass	364.240234
PSA	29.46000
LogP	6.67
Vapor Pressure	0.0±1.4 mmHg at 25°C
Refractive Index	1.596

GHS Safety & Compliance

Irritant / Health HazardSignal word: Danger

H302 — Harmful if swallowed
H312 — Harmful in contact with skin
H332 — Harmful if inhaled
H350 — May cause cancer
H360 — May damage fertility or the unborn child

Frequently Asked Questions

What is the CAS number of Quinestrol?

The CAS number of Quinestrol is 152-43-2.

What are the molecular formula and molecular weight of Quinestrol?

Quinestrol has molecular formula C25H32O2 and molecular weight 364.520 g/mol.

Is Quinestrol hazardous?

Quinestrol has GHS signal word Danger and hazard statements H302 — Harmful if swallowed; H312 — Harmful in contact with skin; H332 — Harmful if inhaled.

What are the upstream and downstream products of Quinestrol?

For Quinestrol, Upstream Products: Cyclopentanol.

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. "Quinestrol (CAS 152-43-2)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-47479-1 (accessed 2026-11-06).

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