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Key Documents

1201002

USP

17α-Dihydroequilin

United States Pharmacopeia (USP) Reference Standard

Synonym(s):

α-Equilol, Estra-1,3,5(10),7-tetraene-3,17α-diol

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About This Item

Empirical Formula (Hill Notation):
C18H22O2
CAS Number:
651-55-8
Molecular Weight:
270.37
UNSPSC Code:
41116107
NACRES:
NA.24

grade

pharmaceutical primary standard

API family

equilin

manufacturer/tradename

USP

application(s)

pharmaceutical (small molecule)

format

neat

InChI

1S/C18H22O2/c1-18-9-8-14-13-5-3-12(19)10-11(13)2-4-15(14)16(18)6-7-17(18)20/h3-5,10,14,16-17,19-20H,2,6-9H2,1H3

InChI key

NLLMJANWPUQQTA-UHFFFAOYSA-N

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General description

This product is provided as delivered and specified by the issuing Pharmacopoeia. All information provided in support of this product, including SDS and any product information leaflets have been developed and issued under the Authority of the issuing Pharmacopoeia.For further information and support please go to the website of the issuing Pharmacopoeia.

Application

17α-Dihydroequilin USP reference standard, intended for use in specified quality tests and assays as specified in the USP compendia. Also, for use with USP monographs such as:
  • Conjugated Estrogens
  • Conjugated Estrogens Tablets

Analysis Note

These products are for test and assay use only. They are not meant for administration to humans or animals and cannot be used to diagnose, treat, or cure diseases of any kind.  ​

Other Notes

Sales restrictions may apply.

Pictograms

Exclamation mark
GHS07

Signal Word

Warning

Hazard Statements

H315,H319

Precautionary Statements

P305 + P351 + P338

Hazard Classifications

Eye Irrit. 2 - Skin Irrit. 2

Storage Class Code

11 - Combustible Solids

WGK

WGK 3

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Certificates of Analysis (COA)

Search for Certificates of Analysis (COA) by entering the products Lot/Batch Number. Lot and Batch Numbers can be found on a product’s label following the words ‘Lot’ or ‘Batch’.

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B R Bhavnani et al.
The Journal of clinical endocrinology and metabolism, 78(1), 197-204 (1994-01-01)
The MCRs of 17 beta-dihydroequilin sulfate and 17 beta-dihydroequilin were determined in normal postmenopausal women by single iv injection of either 17 beta-[3H]dihydroequilin sulfate ([3H]17 beta-EqS) or 17 beta-[3H]dihydroequilin ([3H]17 beta-Eq). After the administration of [3H]17 beta-EqS, blood was drawn
S B Lima et al.
Journal of chromatographic science, 39(9), 385-387 (2001-09-22)
Equine unsaturated estrogens are the main components of brand formulations indicated for hormonal replacement therapy in both hypogonadic and postmenopausal women. These hormones are produced by the fetoplacental unit during equine gestation. A method is described for the quantitative determination
M Tang et al.
Metabolism: clinical and experimental, 45(4), 411-414 (1996-04-01)
The effect of the estrogen metabolites, 4-hydroxyestrone and 17alpha-dihydroequilin (metabolites of estradiol-17beta and equilin, respectively), were examined for antioxidant effects on plasma and lipoprotein lipid peroxidation . Lipid peroxidation was evaluated by products of both fatty acid (thiobarbituric acid-reactive substances
J G Wilcox et al.
Fertility and sterility, 66(5), 748-752 (1996-11-01)
To determine the independent biologic effects of 17 alpha-dihydroequilin sulfate. Prospective randomized study. University of Southern California Medical Center. Twenty-one postmenopausal women, mean age 50 +/- 2 (+/-SEM) years, and mean body mass index 27 +/- 2. Women were randomized
S A Washburn et al.
American journal of obstetrics and gynecology, 169(2 Pt 1), 251-254 (1993-08-01)
Our purpose was to determine the effect of Premarin (conjugated estrogens) and three of its component estrogens on uterine weight and plasma cholesterol concentrations in surgically menopausal female rats. A randomized trial of Premarin and three component estrogens--estrone sulfate, 17
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