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Basic Information
CAS No.: 152-43-2
Name: Quinestrol
Molecular Structure:
Molecular Structure of 152-43-2 (Quinestrol)
Formula: C25H32O2
Molecular Weight: 364.528
Synonyms: 19-Nor-17a-pregna-1,3,5(10)-trien-20-yn-17-ol,3-(cyclopentyloxy)- (6CI,7CI,8CI);17-Ethynylestradiol cyclopentyl ether;17a-Ethynylestradiol 3-cyclopentylether;3-(Cyclopentyloxy)-19-nor-17a-pregna-1,3,5(10)-trien-20-yn-17-ol;3-Cyclopentyloxy-17a-ethynyl-1,3,5(10)-estratrien-17-ol;3-Cyclopentyloxy-17a-ethynylestra-1,3,5(10)-trien-17b-ol;EECPE;Eston;Estrovis;Estrovis 4000;Estrovister;Ethynylestradiol-3-cyclopentyl ether;Plestrovis;Qui-Lea;W 3566;
EINECS: 205-803-1
Density: 1.15 g/cm3
Melting Point: 107 - 108oC
Boiling Point: 502.5 °C at 760 mmHg
Flash Point: 218.8 °C
Appearance: crystals
Hazard Symbols:
Risk Codes: 45-61-20/21/22-46
Safety: 53-22-36/37/39-45
PSA: 29.46000
LogP: 5.22840
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Chemistry

Quinestrol is also called ethinyl estradiol 3-cyclopentyl ether;3-cyclopentyloxy-17-alpha-ethynyloestra-1,3,5(10)-trien-17-beta-ol, is synthetic estrogen.


Molecular Formula: C25H32O2
Molecular Weight: 364.52
EINECS: 205-803-1
Solubility in water:Insoluble
Melting Point:107 - 108°C
Vapor Pressure:6E-11 (25 °C)
pKa/pKb:13.10 (pKa)
Partition Coefficient:5.4
Heat Of Vaporization:81.3 kJ/mol

Uses

Quinestrol is commonly used in hormone replacement therapy, and occasionally to treat breast cancer and prostate cancer.It is also used to treat symptoms of menopause, such as hot flashes.

Toxicity Data With Reference

RTECS:  RC8948000

Safety Profile

Human female reproductive effects by ingestion of extremely small amounts: postpartum disorders and changes in fertility. Experimental reproductive effects. A steroid. When heated to decomposition it emits acrid smoke and irritating fumes.

Hazard Codes:  T
Risk Statements:  45-61-20/21/22-46
Safety Statements:  53-22-36/37/39-45
WGK Germany:  3