U.S. Department of Health & Human Services Divider Arrow National Institutes of Health Divider Arrow NCATS
This repository is under review for potential modification in compliance with Administration directives.

Details

Stereochemistry ABSOLUTE
Molecular Formula 2C18H24O2.H2O
Molecular Weight 562.7792
Optical Activity UNSPECIFIED
Defined Stereocenters 10 / 10
E/Z Centers 0
Charge 0

SHOW SMILES / InChI
Structure of ESTRADIOL HEMIHYDRATE

SMILES

O.C[C@]12CC[C@H]3[C@@H](CCC4=CC(O)=CC=C34)[C@@H]1CC[C@@H]2O.C[C@]56CC[C@H]7[C@@H](CCC8=CC(O)=CC=C78)[C@@H]5CC[C@@H]6O

InChI

InChIKey=ZVVGLAMWAQMPDR-WVEWYJOQSA-N
InChI=1S/2C18H24O2.H2O/c2*1-18-9-8-14-13-5-3-12(19)10-11(13)2-4-15(14)16(18)6-7-17(18)20;/h2*3,5,10,14-17,19-20H,2,4,6-9H2,1H3;1H2/t2*14-,15-,16+,17+,18+;/m11./s1

HIDE SMILES / InChI

Molecular Formula H2O
Molecular Weight 18.0153
Charge 0
Count
Stereochemistry ACHIRAL
Additional Stereochemistry No
Defined Stereocenters 0 / 0
E/Z Centers 0
Optical Activity NONE

Molecular Formula C18H24O2
Molecular Weight 272.382
Charge 0
Count
Stereochemistry ABSOLUTE
Additional Stereochemistry No
Defined Stereocenters 5 / 5
E/Z Centers 0
Optical Activity UNSPECIFIED

Description
Curator's Comment: description was created based on several sources, including https://books.google.ru/books?id=68n6f1Nw6EEC&pg=PA64&redir_esc=y#v=onepage&q&f=false | https://www.fda.gov/downloads/AnimalVeterinary/Products/ApprovedAnimalDrugProducts/FOIADrugSummaries/ucm116143.pdf | https://www.fda.gov/downloads/AnimalVeterinary/Products/ApprovedAnimalDrugProducts/FOIADrugSummaries/UCM338208.pdf

Estradiol benzoate is the synthetic benzoate ester of estradiol, a steroid sex hormone vital to the maintenance of fertility and secondary sexual characteristics in females. As the primary, most potent estrogen hormone produced by the ovaries, estradiol binds to and activates specific nuclear receptors. This agent exhibits mild anabolic and metabolic properties, and increases blood coagulability. Although estradiol benzoate is not approved by the FDA for use in humans in the United States, it is approved for veterinary use as a subdermal implant both alone (CELERIN®) and in combination with the anabolic steroid trenbolone acetate (SYNOVEX® Plus).

Approval Year

Targets

Targets

Primary TargetPharmacologyConditionPotency
Target ID: P08842
Gene ID: 412.0
Gene Symbol: STS
Target Organism: Homo sapiens (Human)
0.0084 nM [EC50]
1.4 nM [EC50]
19.1 nM [IC50]
0.13 nM [Ki]
0.09 nM [Kd]
Conditions

Conditions

ConditionModalityTargetsHighest PhaseProduct
Primary
CLIMARA

Approved Use

Climara is an estrogen indicated for: •Treatment of Moderate to Severe Vasomotor Symptoms due to Menopause •Treatment of Moderate to Severe Symptoms of Vulvar and Vaginal Atrophy due to Menopause •Treatment of Hypoestrogenism due to Hypogonadism, Castration or Primary Ovarian Failure •Prevention of Postmenopausal Osteoporosis

Launch Date

1974
Preventing
CLIMARA

Approved Use

Climara is an estrogen indicated for: •Treatment of Moderate to Severe Vasomotor Symptoms due to Menopause •Treatment of Moderate to Severe Symptoms of Vulvar and Vaginal Atrophy due to Menopause •Treatment of Hypoestrogenism due to Hypogonadism, Castration or Primary Ovarian Failure •Prevention of Postmenopausal Osteoporosis

Launch Date

1974
Primary
CLIMARA

Approved Use

Climara is an estrogen indicated for: •Treatment of Moderate to Severe Vasomotor Symptoms due to Menopause •Treatment of Moderate to Severe Symptoms of Vulvar and Vaginal Atrophy due to Menopause •Treatment of Hypoestrogenism due to Hypogonadism, Castration or Primary Ovarian Failure •Prevention of Postmenopausal Osteoporosis

Launch Date

1974
Cmax

Cmax

ValueDoseCo-administeredAnalytePopulation
92 pg/mL
0.05 mg 1 times / day multiple, topical
dose: 0.05 mg
route of administration: Topical
experiment type: MULTIPLE
co-administered:
ESTRADIOL serum
Homo sapiens
population: UNKNOWN
age: ADULT
sex: FEMALE
food status: UNKNOWN
14.7 pg/mL
0.25 mg 1 times / day steady-state, topical
dose: 0.25 mg
route of administration: Topical
experiment type: STEADY-STATE
co-administered:
ESTRADIOL serum
Homo sapiens
population: UNKNOWN
age: ADULT
sex: FEMALE
food status: UNKNOWN
AUC

AUC

ValueDoseCo-administeredAnalytePopulation
236 pg × h/mL
0.25 mg 1 times / day steady-state, topical
dose: 0.25 mg
route of administration: Topical
experiment type: STEADY-STATE
co-administered:
ESTRADIOL serum
Homo sapiens
population: UNKNOWN
age: ADULT
sex: FEMALE
food status: UNKNOWN
T1/2

T1/2

ValueDoseCo-administeredAnalytePopulation
1.75 h
0.05 mg 1 times / day multiple, topical
dose: 0.05 mg
route of administration: Topical
experiment type: MULTIPLE
co-administered:
ESTRADIOL serum
Homo sapiens
population: UNKNOWN
age: ADULT
sex: FEMALE
food status: UNKNOWN
10 h
0.25 mg 1 times / day steady-state, topical
dose: 0.25 mg
route of administration: Topical
experiment type: STEADY-STATE
co-administered:
ESTRADIOL serum
Homo sapiens
population: UNKNOWN
age: ADULT
sex: FEMALE
food status: UNKNOWN
Overview

Overview

CYP3A4CYP2C9CYP2D6hERG



Drug as perpetrator​

Drug as perpetrator​

Drug as victim

Drug as victim

TargetModalityActivityMetaboliteClinical evidence
minor
minor
minor
minor
minor
minor
no
no
no
no
no
no
no
no
no
yes [Km 7 uM]
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
Sourcing

Sourcing

Vendor/AggregatorIDURL
PubMed

PubMed

TitleDatePubMed
Effect of estradiol benzoate on the proliferation of osteogenic cells in fetal rat fibulae cultured in vitro.
1978 Mar
Suppressive effects of estradiol on 2,3,7,8-tetrachlorodibenzo-p-dioxin-mediated transcriptional activation of murine Cyp1a-1 in mouse hepatoma Hepa 1c1c7 cells.
1998 Nov 27
Estradiol prevents and testosterone promotes Fas-dependent apoptosis in CD4+ Th2 cells by altering Bcl 2 expression.
1999
Estrogen and aryl hydrocarbon responsiveness of ECC-1 endometrial cancer cells.
1999 Apr 25
Growth stimulation of a rat pituitary cell line MtT/E-2 by environmental estrogens in vitro and in vivo.
1999 Aug
Rapid inhibition of rat brain mitochondrial proton F0F1-ATPase activity by estrogens: comparison with Na+, K+ -ATPase of porcine cortex.
1999 Feb 26
Low-dose bioactivity of xenoestrogens in animals: fetal exposure to low doses of methoxychlor and other xenoestrogens increases adult prostate size in mice.
1999 Jan-Mar
Short-term effects of high-dose 17beta-estradiol in postmenopausal PD patients: a crossover study.
1999 Jul 13
Steroid feedback on gonadotropin release and pituitary gonadotropin subunit mRNA in mice lacking a functional estrogen receptor alpha.
1999 Oct
Transcriptional activation of c-fos protooncogene by 17beta-estradiol: mechanism of aryl hydrocarbon receptor-mediated inhibition.
1999 Sep
Proteinase inhibitor 9, an inhibitor of granzyme B-mediated apoptosis, is a primary estrogen-inducible gene in human liver cells.
2000 Feb 25
Estrogen activation of the nuclear orphan receptor CAR (constitutive active receptor) in induction of the mouse Cyp2b10 gene.
2000 Nov
Estradiol enhances the resistance of LDL to oxidation by stabilizing apoB-100 conformation.
2000 Nov 14
Differential effects of xenoestrogens on coactivator recruitment by estrogen receptor (ER) alpha and ERbeta.
2000 Nov 17
Changes in serum and tissue zinc levels in sex hormone-induced prostatic carcinogenesis in the noble rat.
2000 Nov-Dec
Use of salivary biomarkers in biobehavioral research: cotton-based sample collection methods can interfere with salivary immunoassay results.
2001 Feb
Estrogen induces the Akt-dependent activation of endothelial nitric-oxide synthase in vascular endothelial cells.
2001 Feb 2
Increased expression of a novel heat shock protein transcript in the mouse uterus during decidualization and in response to progesterone.
2001 Jan
Regulation of progesterone receptors and decidualization in uterine stroma of the estrogen receptor-alpha knockout mouse.
2001 Jan
Comparison of histological compositions and apoptosis in canine spontaneous benign prostatic hyperplasia treated with androgen suppressive agents chlormadinone acetate and finasteride.
2001 Jan
Rapid and reversible inhibition of brain aromatase activity.
2001 Jan
Oestrogen-induced changes in the synaptology of the monkey (Cercopithecus aethiops) arcuate nucleus during gonadotropin feedback.
2001 Jan
Influence of gender and sex hormones on nicotine acute pharmacological effects in mice.
2001 Jan
Gender-related distinctions in protein kinase C activity in rat vascular smooth muscle.
2001 Jan
Effects of heterocyclic amines with mammary gland carcinogenic potential on estrogenic response of uterus in ovariectomized rats.
2001 Jan 10
Reduction of gamma-aminobutyric acid-ergic neurotransmission as a putative mechanism of radiation induced activation of the gonadotropin releasing-hormone-pulse generator leading to precocious puberty in female rats.
2001 Jan 5
Estrogen decreases osteoclast formation by down-regulating receptor activator of NF-kappa B ligand (RANKL)-induced JNK activation.
2001 Mar 23
Enhanced multispecificity of arabidopsis vacuolar multidrug resistance-associated protein-type ATP-binding cassette transporter, AtMRP2.
2001 Mar 23
The unusual binding properties of the third distinct teleost estrogen receptor subtype ERbetaa are accompanied by highly conserved amino acid changes in the ligand binding domain.
2004 Jun
Patents

Sample Use Guides

In Vivo Use Guide
Curator's Comment: Estradiol benzoate is not approved by the FDA for use in humans in the United States.
Unknown
Route of Administration: Unknown
Estradiol-3-sulfate (E2SO4) infused intracerebroventricularly (icv) significantly increased plasma adrenocorticotropic hormone (ACTH) and cortisol concentrations. All minipumps in the treated fetuses were filled with E2SO4 in the vehicle (water) and minipumps in the control fetuses were filled with vehicle only. These minipumps deliver a constant infusion of 5 μL/h; the concentration of E2SO4 in infusates was therefore 8.33 μg/μL. It was concluded, that E2SO4 had complex actions on the fetal brain, which might involve deconjugation by steroid sulfatase. But that the net result of direct E2SO4 icv infusion was more complex than could be accounted for by infusion of E2 alone.
Substance Class Chemical
Created
by admin
on Mon Mar 31 18:14:23 GMT 2025
Edited
by admin
on Mon Mar 31 18:14:23 GMT 2025
Record UNII
CXY7B3Q98Z
Record Status Validated (UNII)
Record Version
  • Download
Name Type Language
ESTRASORB
Preferred Name English
ESTRADIOL HEMIHYDRATE
EP   MI   ORANGE BOOK   WHO-DD  
Common Name English
Estradiol hemihydrate [WHO-DD]
Common Name English
ESTRADIOL HEMIHYDRATE [MI]
Common Name English
MYFEMBREE COMPONENT ESTRADIOL HEMIHYDRATE
Brand Name English
ESTRADIOL HEMIHYDRATE [ORANGE BOOK]
Common Name English
ESTRADIOL HEMIHYDRATE [EP MONOGRAPH]
Common Name English
(17.BETA.)-ESTRA-1,3,5(10)-TRIENE-3,17-DIOL HEMIHYDRATE
Common Name English
Classification Tree Code System Code
EMA ASSESSMENT REPORTS ZOELY (AUTHORIZED: CONTRACEPTION)
Created by admin on Mon Mar 31 18:14:23 GMT 2025 , Edited by admin on Mon Mar 31 18:14:23 GMT 2025
EU-Orphan Drug EU/3/05/275
Created by admin on Mon Mar 31 18:14:23 GMT 2025 , Edited by admin on Mon Mar 31 18:14:23 GMT 2025
NCI_THESAURUS C478
Created by admin on Mon Mar 31 18:14:23 GMT 2025 , Edited by admin on Mon Mar 31 18:14:23 GMT 2025
Code System Code Type Description
DRUG BANK
DBSALT001383
Created by admin on Mon Mar 31 18:14:23 GMT 2025 , Edited by admin on Mon Mar 31 18:14:23 GMT 2025
PRIMARY
RXCUI
236859
Created by admin on Mon Mar 31 18:14:23 GMT 2025 , Edited by admin on Mon Mar 31 18:14:23 GMT 2025
PRIMARY RxNorm
SMS_ID
100000089218
Created by admin on Mon Mar 31 18:14:23 GMT 2025 , Edited by admin on Mon Mar 31 18:14:23 GMT 2025
PRIMARY
PUBCHEM
154274
Created by admin on Mon Mar 31 18:14:23 GMT 2025 , Edited by admin on Mon Mar 31 18:14:23 GMT 2025
PRIMARY
EPA CompTox
DTXSID60858948
Created by admin on Mon Mar 31 18:14:23 GMT 2025 , Edited by admin on Mon Mar 31 18:14:23 GMT 2025
PRIMARY
FDA UNII
CXY7B3Q98Z
Created by admin on Mon Mar 31 18:14:23 GMT 2025 , Edited by admin on Mon Mar 31 18:14:23 GMT 2025
PRIMARY
WIKIPEDIA
Estradiol hemihydrate
Created by admin on Mon Mar 31 18:14:23 GMT 2025 , Edited by admin on Mon Mar 31 18:14:23 GMT 2025
PRIMARY
ChEMBL
CHEMBL135
Created by admin on Mon Mar 31 18:14:23 GMT 2025 , Edited by admin on Mon Mar 31 18:14:23 GMT 2025
PRIMARY
NCI_THESAURUS
C47992
Created by admin on Mon Mar 31 18:14:23 GMT 2025 , Edited by admin on Mon Mar 31 18:14:23 GMT 2025
PRIMARY
MERCK INDEX
m5028
Created by admin on Mon Mar 31 18:14:23 GMT 2025 , Edited by admin on Mon Mar 31 18:14:23 GMT 2025
PRIMARY Merck Index
DAILYMED
CXY7B3Q98Z
Created by admin on Mon Mar 31 18:14:23 GMT 2025 , Edited by admin on Mon Mar 31 18:14:23 GMT 2025
PRIMARY
EVMPD
SUB11941MIG
Created by admin on Mon Mar 31 18:14:23 GMT 2025 , Edited by admin on Mon Mar 31 18:14:23 GMT 2025
PRIMARY
CAS
35380-71-3
Created by admin on Mon Mar 31 18:14:23 GMT 2025 , Edited by admin on Mon Mar 31 18:14:23 GMT 2025
PRIMARY
Related Record Type Details
PARENT -> SALT/SOLVATE
BASIS OF STRENGTH->SUBSTANCE
ASSAY (UV)
EP
ANHYDROUS->SOLVATE
Related Record Type Details
IMPURITY -> PARENT
CHROMATOGRAPHIC PURITY (HPLC/UV)
EP
IMPURITY -> PARENT
CHROMATOGRAPHIC PURITY (HPLC/UV)
EP
IMPURITY -> PARENT
CHROMATOGRAPHIC PURITY (HPLC/UV)
EP
IMPURITY -> PARENT
For the calculation of contents, multiply the peak areas by 0.4
CHROMATOGRAPHIC PURITY (HPLC/UV)
EP
Related Record Type Details
ACTIVE MOIETY