| Identification | Back Directory | [Name]
EQUILENIN | [CAS]
517-09-9 | [Synonyms]
E 400
NSC 9901
517-09-9
EQUILENIN
Equilenina
Equilenine
D-EQUILENIN
l-Equilenin
Isoequilenin
Isoequilenine
(+)-EQUILENIN
l-Isoequilenin
l-iso-Equilenin
d-iso-Equilenin
14-epi-Equilenin
equilenin solution
(-)-13-Isoequilenin
EQUILENIN USP/EP/BP
(-)-13-iso-equilenin
1,3,5(10)-6,8-ESTRAPENTAEN-3-OL-17-ONE
5,7,9-pentaen-17-one,3-hydroxy-estra-3
3-HYDROXYESTRA-1,3,5,7,9-PENTAEN-17-ONE
D-1,3,5(10),6,8-ESTRAPENTAEN-3-OL-17-ONE
5(10),6,8-pentaen-17-one,3-hydroxy-estra-3
Estra-1,3,5,7,9-pentaen-17-one, 3-hydroxy-
Equilenin, 100 ng/ in Acetonitril, Pestanal
3-HYDROXY-1,3,5(10),6,8-ESTRAPENTAEN-17-ONE
3-Hydroxyestra-1(10),2,4,6,8-pentaen-17-one
3-Hydroxyestra-1,3,5(10),6,8-pentaen-17-one
3-hydroxyoestra-1,3,5(10),6,8-pentaen-17-one
Estra-1,3,5(10),6,8-pentaen-17-one, 3-hydroxy-
[13α,(-)]-3-Hydroxyestra-1,3,5,7,9-pentene-17-one
(14β)-3-Hydroxyestra-1(10),2,4,6,8-pentene-17-one
[13α,14β,(-)]-3-Hydroxyestra-1,3,5,7,9-pentene-17-one | [EINECS(EC#)]
208-230-5 | [Molecular Formula]
C18H18O2 | [MDL Number]
MFCD00003619 | [MOL File]
517-09-9.mol | [Molecular Weight]
266.33 |
| Chemical Properties | Back Directory | [Melting point ]
258-259° | [alpha ]
D16 +87° (12.8 mg made up to 1.8 ml in dioxane) | [Boiling point ]
349.54°C (rough estimate) | [density ]
1.1305 (rough estimate) | [refractive index ]
1.4800 (estimate) | [Fp ]
2 °C | [storage temp. ]
2-8°C | [solubility ]
DMSO (Slightly), Methanol (Slightly, Heated) | [form ]
Solid | [pka]
pKa 9.72 (H2O t=25.0±0.02 ) (Uncertain);9.75±0.06 (Uncertain) | [color ]
Pale Yellow to Light Beige | [Water Solubility ]
1.52mg/L(25 ºC) | [EPA Substance Registry System]
Equilenin (517-09-9) |
| Hazard Information | Back Directory | [Uses]
Equilenin is a naturally occuring estrogenic steroidal hormone (1,2) isolated from urine of pregnant mares (3). Not found in human urine. Component of conjugated estrogenic hormones. Estrogen. This compound is a contaminant of emerging concern (CECs). Drinking water contaminant candidate list 3 (CCL 3) compound as per United States Environmental Protection Agency (EPA), environmental, and food contaminants. | [Uses]
Estrogenic steroidal hormone isolated from urine of pregnant mares. Occurs naturally in the d-form. Not found in human urine. Component of conjugated estrogenic hormones. Estrogen. | [Definition]
ChEBI: Equilenin is a 3-hydroxy steroid that is estrone which carries two double bonds at positions 6 and 8. It is found in the urine of pregnant mare's and extensively used for estrogen replacement therapy in postmenopausal women. It has a role as a mammalian metabolite and an antioxidant. It is a 3-hydroxy steroid and a 17-oxo steroid. | [storage]
Store at -20°C | [Purification Methods]
Crystallise (+)-equilenin from EtOH (solubility is 0.63% at 18o, 2.5% at 78o), aqueous EtOH or *C6H6 (Norite) and dry it in a vacuum. It sublimes on melting and at 170-180o/0.01mm. The acetate crystallises from MeOH with m 165-167o and [ ] D +71o (c 1, CHCl3). [Bachmann et al. J Am Chem Soc 62 824 1940, Beilstein 8 III 1522, 1523, 1525, 8 IV 1420.] |
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