Formestane

Modify Date: 2026-07-01 21:13:48

Formestane Structure
Formestane structure
Common Name Formestane
CAS Number 566-48-3 Molecular Weight 302.408
Density 1.2±0.1 g/cm3 Boiling Point 475.4±45.0 °C at 760 mmHg
Molecular Formula C19H26O3 Melting Point 199-202°C
MSDS Chinese USA Flash Point 255.4±25.2 °C
Symbol GHS08
GHS08
Signal Word Danger

 Names

Name formestane
Synonym More Synonyms

 Chemical & Physical Properties

Density 1.2±0.1 g/cm3
Boiling Point 475.4±45.0 °C at 760 mmHg
Melting Point 199-202°C
Molecular Formula C19H26O3
Molecular Weight 302.408
Flash Point 255.4±25.2 °C
Exact Mass 302.188202
PSA 54.37000
LogP 2.66
Vapour Pressure 0.0±2.7 mmHg at 25°C
Index of Refraction 1.570
InChIKey OSVMTWJCGUFAOD-KZQROQTASA-N
SMILES CC12CCC3C(CCC4=C(O)C(=O)CCC43C)C1CCC2=O
Storage condition 2-8°C

 Toxicological Information

CHEMICAL IDENTIFICATION

RTECS NUMBER :
BV8152500
CHEMICAL NAME :
Androst-4-ene-3,17-dione, 4-hydroxy-
CAS REGISTRY NUMBER :
566-48-3
LAST UPDATED :
199709
DATA ITEMS CITED :
4
MOLECULAR FORMULA :
C19-H26-O3
MOLECULAR WEIGHT :
302.45
WISWESSER LINE NOTATION :
L E5 B666 FV OV MUTJ A1 E1 NQ

HEALTH HAZARD DATA

ACUTE TOXICITY DATA

TYPE OF TEST :
TDLo - Lowest published toxic dose
ROUTE OF EXPOSURE :
Subcutaneous
DOSE :
182 mg/kg
SEX/DURATION :
female 3-5 day(s) after conception
TOXIC EFFECTS :
Reproductive - Maternal Effects - parturition
REFERENCE :
JOENAK Journal of Endocrinology. (Biochemical Soc. Book Depot, POB 32, Commerce Way, Colchester, Essex CO2 8HP, UK) V.1- 1939- Volume(issue)/page/year: 118,93,1988
TYPE OF TEST :
TDLo - Lowest published toxic dose
ROUTE OF EXPOSURE :
Subcutaneous
DOSE :
136 mg/kg
SEX/DURATION :
female 2-4 day(s) after conception
TOXIC EFFECTS :
Reproductive - Maternal Effects - other effects
REFERENCE :
JOENAK Journal of Endocrinology. (Biochemical Soc. Book Depot, POB 32, Commerce Way, Colchester, Essex CO2 8HP, UK) V.1- 1939- Volume(issue)/page/year: 118,93,1988
TYPE OF TEST :
TDLo - Lowest published toxic dose
ROUTE OF EXPOSURE :
Subcutaneous
DOSE :
120 mg/kg
SEX/DURATION :
female 11-22 day(s) after conception
TOXIC EFFECTS :
Reproductive - Effects on Newborn - behavioral
REFERENCE :
ECJPAE Endocrinologia Japonica. (Japan Pub. Trading Co., Ltd., POB 5030, Tokyo International, Tokyo, Japan) V.1- 1954- Volume(issue)/page/year: 36,29,1989
TYPE OF TEST :
TDLo - Lowest published toxic dose
ROUTE OF EXPOSURE :
Intramuscular
DOSE :
250 mg/kg
SEX/DURATION :
female 3-7 day(s) after conception
TOXIC EFFECTS :
Reproductive - Fertility - pre-implantation mortality (e.g. reduction in number of implants per female; total number of implants per corpora lutea)
REFERENCE :
ENDOAO Endocrinology (Baltimore). (Williams & Wilkins Co., 428 E. Preston St., Baltimore, MD 21203) V.1- 1917- Volume(issue)/page/year: 100,1684,1977

 Safety Information

Symbol GHS08
GHS08
Signal Word Danger
Hazard Statements H360
Precautionary Statements P201-P308 + P313
Personal Protective Equipment Eyeshields;full-face particle respirator type N100 (US);Gloves;respirator cartridge type N100 (US);type P1 (EN143) respirator filter;type P3 (EN 143) respirator cartridges
Hazard Codes T:Toxic
Risk Phrases R60
Safety Phrases S53-S36/37/39-S45
RIDADR NONH for all modes of transport
WGK Germany 3
RTECS BV8152500

 Synthetic Route

 Articles36

More Articles
Screening estrogenic activities of chemicals or mixtures in vivo using transgenic (cyp19a1b-GFP) zebrafish embryos.

PLoS ONE 7 , e36069, (2012)

The tg(cyp19a1b-GFP) transgenic zebrafish expresses GFP (green fluorescent protein) under the control of the cyp19a1b gene, encoding brain aromatase. This gene has two major characteristics: (i) it is...

Combined inhibitory effect of formestane and herceptin on a subpopulation of CD44+/CD24low breast cancer cells.

Cancer Sci. 101 , 1661-9, (2010)

In breast cancer, stromal cells surrounding cancer epithelial cells can influence phenotype by producing paracrine factors. Among many mediators of epithelial-stromal interactions, aromatase activity ...

The effects of aromatase inhibitors and selective estrogen receptor modulators on eye development in the zebrafish (Danio rerio).

Curr. Eye Res. 32(10) , 819-27, (2007)

It has been shown that the steroid hormone estrogen plays an important role in the development of the central nervous system. The purpose of these studies was to determine the effect of estrogen on ze...

 FormestaneBioassay

View more

Name: Inhibition of neurosphere proliferation of mouse neural precursor cells by MTT assay
Source: ChEMBL
Target: N/A
External Id: CHEMBL1266185
Name: Primary qHTS assay for inhibitors of alpha-synuclein gene (SNCA) expression
Source: NCGC
External Id: SNCA-p-activity-luciferase
Name: Fluorescence-based cell-based primary high throughput screening assay to identify ago...
Source: The Scripps Research Institute Molecular Screening Center
Target: muscarinic acetylcholine receptor M1 [Homo sapiens]
External Id: CHRM1_AG_FLUO8_1536_1X%ACT PRUN
Name: Inhibition of human aromatase extracted from placental microsomes using [1beta-3H]and...
Source: ChEMBL
Target: Aromatase
External Id: CHEMBL3755860
Name: Inhibition of cytochrome P450 19A1 aromatase from human placental microsomes
Source: ChEMBL
Target: Aromatase
External Id: CHEMBL645585
Name: Increase the activity of the Burkholderia fixLJ 2-component system
Source: ICCB-Longwood/NSRB Screening Facility, Harvard Medical School
Target: Burkholderia multivorans
External Id: HMS1625
Name: Fluorescence-based cell-based primary high throughput screening assay to identify pos...
Source: The Scripps Research Institute Molecular Screening Center
Target: muscarinic acetylcholine receptor M1 [Homo sapiens]
External Id: CHRM1_PAM_FLUO8_1536_1X%ACT PRUN
Name: Half-life period of the compound
Source: ChEMBL
Target: N/A
External Id: CHEMBL876340
Name: Inhibition of aromatase in denucleated ovarian fraction extracted from PMSG pretreate...
Source: ChEMBL
Target: Aromatase
External Id: CHEMBL3757109
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 Synonyms

4-Hydroxyandrost-4-ene-3,17-dione
4-Hydroxy-4-androstene-3,17-dione
Formestane
B,Aromatase inhibitor
Lentaron
4-androsten-4-ol-3,17-dione
4-Hydroxyandrostenedione
4-OH-A
MFCD00057814
(8R,9S,10R,13S,14S)-4-hydroxy-10,13-dimethyl-2,6,7,8,9,11,12,14,15,16-decahydro-1H-cyclopenta[a]phenanthrene-3,17-dione
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