estriol and its Impurities

A natural steroidal estrogen, Estriol is also known as 16α-hydroxyestradiol. It is used as a hormone replacement therapy in menopausal symptoms. It is produced by the ovaries during pregnancy. It is an agonist of both of the estrogen receptors (ER), ERα and ERβ. Reference standards of Estriol API, and its pharmacopeial, non pharmacopeial impurities, and stable isotopes are listed below.

Displaying 61 results for estriol Impurities
PA 05 19540

Estriol - Impurity J

17-epi-Estradiol

  • Catalogue No.:PA 05 19540

  • CAS :

    57-91-0

  • Molecular Formula : C18H24O2

  • Molecular Weight : 272.38

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PA 05 21000

Estriol

Estriol

  • Catalogue No.:PA 05 21000

  • CAS :

    50-27-1

  • Molecular Formula : C18H24O3

  • Molecular Weight : 288.38

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PA 05 21010

Estriol - Impurity A

9,11-Didehydroestriol

  • Catalogue No.:PA 05 21010

  • CAS :

    246021-20-5

  • Molecular Formula : C18H22O3

  • Molecular Weight : 286.37

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PA 05 21020

Estriol - Impurity B

Estrone

  • Catalogue No.:PA 05 21020

  • CAS :

    53-16-7

  • Molecular Formula : C18H22O2

  • Molecular Weight : 270.37

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PA 05 21030

Estriol - Impurity C

Estriol 3-Methyl Ether

  • Catalogue No.:PA 05 21030

  • CAS :

    1474-53-9

  • Molecular Formula : C19H26O3

  • Molecular Weight : 302.41

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PA 05 21040

Estriol - Impurity D

Estradiol

  • Catalogue No.:PA 05 21040

  • CAS :

    50-28-2

  • Molecular Formula : C18H24O2

  • Molecular Weight : 272.38

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PA 05 21050

Estriol - Impurity E

17-epi-Estriol

  • Catalogue No.:PA 05 21050

  • CAS :

    1228-72-4

  • Molecular Formula : C18H24O3

  • Molecular Weight : 288.38

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PA 05 21060

Estriol - Impurity F

16-Epi-estriol

  • Catalogue No.:PA 05 21060

  • CAS :

    547-81-9

  • Molecular Formula : C18H24O3

  • Molecular Weight : 288.38

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PA 05 21110

Estriol - Impurity K

Estrone Acetate

  • Catalogue No.:PA 05 21110

  • CAS :

    901-93-9

  • Molecular Formula : C20H24O3

  • Molecular Weight : 312.40

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PA 05 21510

Estriol 3-Succinate

Estriol 3-Succinate

  • Catalogue No.:PA 05 21510

  • CAS :

    47575-61-1

  • Molecular Formula : C22H28O6

  • Molecular Weight : 388.45

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PA 05 21520

Estriol Trisulfate Trisodium Salt

Estriol Trisulfate Trisodium Salt

  • Catalogue No.:PA 05 21520

  • CAS :

    100940-55-4

  • Molecular Formula : C18H21Na3O12S3

  • Molecular Weight : 594.52

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PA 05 21530

Estriol Tri-(2,2,2-trichloroethyl)sulfate

Estriol Tri-(2,2,2-trichloroethyl)sulfate

  • Catalogue No.:PA 05 21530

  • CAS :

    NA

  • Molecular Formula : C24H27Cl9O12S3

  • Molecular Weight : 922.74

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PA 05 21540

17-Iodo-3-O-methyl Estratetraenol

17-Iodo-3-O-methyl Estratetraenol

  • Catalogue No.:PA 05 21540

  • CAS :

    105644-55-1

  • Molecular Formula : C19H23IO

  • Molecular Weight : 394.29

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PA 05 21550

3-O-Methyl Estrone Hydrazone

3-O-Methyl Estrone Hydrazone

  • Catalogue No.:PA 05 21550

  • CAS :

    105663-60-3

  • Molecular Formula : C19H26N2O

  • Molecular Weight : 298.42

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PA 05 21560

3-O-Methyl 6-Hydroxy-17β-estradiol 17-O-Tetrahydropyran

3-O-Methyl 6-Hydroxy-17β-estradiol 17-O-Tetrahydropyran

  • Catalogue No.:PA 05 21560

  • CAS :

    473882-84-7

  • Molecular Formula : C24H34O4

  • Molecular Weight : 386.52

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PA 05 21570

3-O-Benzyl Estriol

3-O-Benzyl Estriol

  • Catalogue No.:PA 05 21570

  • CAS :

    18650-87-8

  • Molecular Formula : C25H30O3

  • Molecular Weight : 378.5

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PA 05 21580

2-Methoxy 17β-Estradiol

2-Methoxy 17β-Estradiol

  • Catalogue No.:PA 05 21580

  • CAS :

    362-07-2

  • Molecular Formula : C19H26O3

  • Molecular Weight : 302.41

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PA 05 21590

1,3,5(10)-Estratrien-2,3,4,17beta-tetrol-2,4-dimethyl Ether

1,3,5(10)-Estratrien-2,3,4,17beta-tetrol-2,4-dimethyl Ether

  • Catalogue No.:PA 05 21590

  • CAS :

    65968-99-2

  • Molecular Formula : C20H28O4

  • Molecular Weight : 332.43

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PA 05 22620

Estriol - Impurity H

3,16α-Dihydroxyestra-1,3,5(10)-trien-17-one

  • Catalogue No.:PA 05 22620

  • CAS :

    566-76-7

  • Molecular Formula : C18H22O3

  • Molecular Weight : 286.37

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PA STI 011420

3-O-Benzyl Estriol-d1

3-O-Benzyl Estriol-d1

  • Catalogue No.:PA STI 011420

  • CAS :

    1366363-19-0

  • Molecular Formula : C25H29DO3

  • Molecular Weight : 379.51

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PA EPE1680000

Estriol (E1680000)

Estriol (E1680000)

  • Catalogue No.:PA EPE1680000

  • CAS :

    NA

  • Molecular Formula : NA

  • Molecular Weight : NA

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PA EPE1680005

Estriol impurity A (E1680005)

Estriol impurity A (E1680005)

  • Catalogue No.:PA EPE1680005

  • CAS :

    NA

  • Molecular Formula : NA

  • Molecular Weight : NA

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PA JP0076

Estriol (JP 0076)

Estriol (JP 0076)

  • Catalogue No.:PA JP0076

  • CAS :

    NA

  • Molecular Formula : NA

  • Molecular Weight : NA

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PA USP1254508

Estriol (1254508)

Estriol (1254508)

  • Catalogue No.:PA USP1254508

  • CAS :

    50-27-1

  • Molecular Formula : NA

  • Molecular Weight : NA

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PA BP752RB

estriol (752RB)

estriol (752RB)

  • Catalogue No.:PA BP752RB

  • CAS :

    NA

  • Molecular Formula : NA

  • Molecular Weight : NA

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PA BP753RB

estriol impurity standard (753RB)

estriol impurity standard (753RB)

  • Catalogue No.:PA BP753RB

  • CAS :

    NA

  • Molecular Formula : NA

  • Molecular Weight : NA

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PAI 05 007010

Estriol Triacetate

  • Catalogue No.:PAI 05 007010

  • CAS :

    2284-32-4

  • Molecular Formula : C24H30O6

  • Molecular Weight : 414.50

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PAI 05 007020

(8S,13S,14S,16R,17R)-9-hydroxy-13-methyl-7,8,9,11,12,13,14,15,16,17-decahydro-6H-cyclopenta[a]phenanthrene-3,16,17-triyl triacetate

  • Catalogue No.:PAI 05 007020

  • CAS :

    NA

  • Molecular Formula : C24H30O7

  • Molecular Weight : 430.50

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PA 05 21070

Estriol - Impurity G

16,17-epi-Estriol

  • Catalogue No.:PA 05 21070

  • CAS :

    793-89-5

  • Molecular Formula : C18H24O3

  • Molecular Weight : 288.39

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PA 05 21090

Estriol - Impurity I

3-Hydroxy-17-oxa-D-homoestra-1,3,5(10)-trien-17a-one

  • Catalogue No.:PA 05 21090

  • CAS :

    15370-49-7

  • Molecular Formula : C18H22O3

  • Molecular Weight : 286.37

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PA 05 0211000

Estrone b-D-glucuronide

Estrone b-D-glucuronide

  • Catalogue No.:PA 05 0211000

  • CAS :

    2479-90-5

  • Molecular Formula : C24H30O8

  • Molecular Weight : 446.50

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PA 05 0211001

Estriol Succinate

Estriol Succinate

  • Catalogue No.:PA 05 0211001

  • CAS :

    514-68-1

  • Molecular Formula : C26H32O9

  • Molecular Weight : 488.53

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PA 05 0211002

4-HYDROXYESTRADIOL

4-HYDROXYESTRADIOL

  • Catalogue No.:PA 05 0211002

  • CAS :

    5976-61-4

  • Molecular Formula : C18H24O3

  • Molecular Weight : 288.39

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PA 05 0211003

2-HYDROXYESTRADIOL

2-HYDROXYESTRADIOL

  • Catalogue No.:PA 05 0211003

  • CAS :

    362-05-0

  • Molecular Formula : C18H24O3

  • Molecular Weight : 288.39

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PA 05 0211004

4-Methoxyestradiol

4-Methoxyestradiol

  • Catalogue No.:PA 05 0211004

  • CAS :

    26788-23-8

  • Molecular Formula : C19H26O3

  • Molecular Weight : 302.41

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PA 05 0211005

2-Hydroxy estrone

2-Hydroxy estrone

  • Catalogue No.:PA 05 0211005

  • CAS :

    362-06-1

  • Molecular Formula : C18H22O3

  • Molecular Weight : 286.37

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PA 05 0211006

4-Hydroxy Estrone

4-Hydroxy Estrone

  • Catalogue No.:PA 05 0211006

  • CAS :

    3131-23-5

  • Molecular Formula : C18H22O3

  • Molecular Weight : 286.37

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PA 05 0211007

6alpha-Hydroxyestriol

6alpha-Hydroxyestriol

  • Catalogue No.:PA 05 0211007

  • CAS :

    7291-49-8

  • Molecular Formula : C18H24O4

  • Molecular Weight : 304.39

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PA 05 0211008

Estriol 16,17-Diacetate

Estriol 16,17-Diacetate

  • Catalogue No.:PA 05 0211008

  • CAS :

    805-26-5

  • Molecular Formula : C22H28O5

  • Molecular Weight : 372.46

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PA 05 0211009

6-Ketoestriol

6-Oxoestriol

  • Catalogue No.:PA 05 0211009

  • CAS :

    7323-86-6

  • Molecular Formula : C18H22O4

  • Molecular Weight : 302.37

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PA 05 0211010

10,17β-Dihydroxy-estra-1,4-dien-3-one

10,17β-Dihydroxy-estra-1,4-dien-3-one

  • Catalogue No.:PA 05 0211010

  • CAS :

    549-02-0

  • Molecular Formula : C18H24O3

  • Molecular Weight : 288.39

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PA 05 0211011

(17β)-3,17-Bis[(tetrahydro-2H-pyran-2-yl)oxy]-estra-1,3,5(10)-trien-6-ol (Mixture of Diasteromers)

(17β)-3,17-Bis[(tetrahydro-2H-pyran-2-yl)oxy]-estra-1,3,5(10)-trien-6-ol (Mixture of Diasteromers)

  • Catalogue No.:PA 05 0211011

  • CAS :

    122566-22-7

  • Molecular Formula : C28H40O5

  • Molecular Weight : 456.62

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PA 05 0211012

2-Methylestrone

2-Methylestrone

  • Catalogue No.:PA 05 0211012

  • CAS :

    2626-12-2

  • Molecular Formula : C19H24O2

  • Molecular Weight : 284.4

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PA STI 089280

Estriol-D2

Estriol-D2

  • Catalogue No.:PA STI 089280

  • CAS :

    53866-32-3

  • Molecular Formula : C18H22D2O3

  • Molecular Weight : 290.4

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PA 05 0211013

Estetrol

Estetrol

  • Catalogue No.:PA 05 0211013

  • CAS :

    15183-37-6

  • Molecular Formula : C18H24O4

  • Molecular Weight : 304.39

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PA 05 0211014

15,16-Deshydroxy 3-O-Benzyl Estetrol 17-Acetate

15,16-Deshydroxy 3-O-Benzyl Estetrol 17-Acetate

  • Catalogue No.:PA 05 0211014

  • CAS :

    690996-25-9

  • Molecular Formula : C27H30O3

  • Molecular Weight : 402.53

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PA 05 0211015

3-O-Benzyl Estetrol 17-Acetate

3-O-Benzyl Estetrol 17-Acetate

  • Catalogue No.:PA 05 0211015

  • CAS :

    690996-24-8

  • Molecular Formula : C27H32O5

  • Molecular Weight : 436.55

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PA 05 0211016

Estetrol 17-Acetate

Estetrol 17-Acetate

  • Catalogue No.:PA 05 0211016

  • CAS :

    690996-23-7

  • Molecular Formula : C20H26O5

  • Molecular Weight : 346.42

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PA 05 0211017

2,4-Dibromo Estetrol

2,4-Dibromo Estetrol

  • Catalogue No.:PA 05 0211017

  • CAS :

    NA

  • Molecular Formula : C18H22Br2O4

  • Molecular Weight : 462.18

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PA 05 0211018

Estetrol Monohydrate

Estetrol Monohydrate

  • Catalogue No.:PA 05 0211018

  • CAS :

    2055649-81-3

  • Molecular Formula : C18H26O5

  • Molecular Weight : 322.4

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PA 05 0211019

(8R,9S,13S,14S,15R,16R,17R)-2,4-Dibromo-3,15,16-trihydroxy-13-methyl-7,8,9,11,12,13,14,15,16,17-decahydro-6H-cyclopenta[a]phenanthren-17-yl acetate

(8R,9S,13S,14S,15R,16R,17R)-2,4-Dibromo-3,15,16-trihydroxy-13-methyl-7,8,9,11,12,13,14,15,16,17-decahydro-6H-cyclopenta[a]phenanthren-17-yl acetate

  • Catalogue No.:PA 05 0211019

  • CAS :

    NA

  • Molecular Formula : C20H24Br2O5

  • Molecular Weight : 504.22

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PA 05 0211020

Estriol 16α-(β-D-Glucuronide) Sodium Salt

Estriol 16α-(β-D-Glucuronide) Sodium Salt

  • Catalogue No.:PA 05 0211020

  • CAS :

    1852-44-4

  • Molecular Formula : C24H32NaO9

  • Molecular Weight : 487.5

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PA 05 0211021

(8R,9S,13S,14S,15R,16R,17R)-3-(Benzyloxy)-13-methyl-7,8,9,11,12,13,14,15,16,17-decahydro-6H-cyclopenta[a]phenanthrene-15,16,17-triol

(8R,9S,13S,14S,15R,16R,17R)-3-(Benzyloxy)-13-methyl-7,8,9,11,12,13,14,15,16,17-decahydro-6H-cyclopenta[a]phenanthrene-15,16,17-triol

  • Catalogue No.:PA 05 0211021

  • CAS :

    1426679-35-7

  • Molecular Formula : C25H30O4

  • Molecular Weight : 394.51

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PA 05 0211022

6-Oxo-Estetrol

6-Oxo-Estetrol

  • Catalogue No.:PA 05 0211022

  • CAS :

    59996-11-1

  • Molecular Formula : C18H22O5

  • Molecular Weight : 318.37

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PA 05 0211023

(8R,9S,13S,14S,15S,16S,17R)-13-Methyl-7,8,9,11,12,13,14,15,16,17-decahydro-6H-cyclopenta[a]phenanthrene-3,15,16,17-tetraol

(8R,9S,13S,14S,15S,16S,17R)-13-Methyl-7,8,9,11,12,13,14,15,16,17-decahydro-6H-cyclopenta[a]phenanthrene-3,15,16,17-tetraol

  • Catalogue No.:PA 05 0211023

  • CAS :

    58001-91-5

  • Molecular Formula : C18H24O4

  • Molecular Weight : 304.39

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PA 05 0211024

(8R,9S,13S,17R)-3,15,17-Trihydroxy-13-methyl-6,7,8,9,11,12,13,17-octahydro-16H-cyclopenta[a]phenanthren-16-one

(8R,9S,13S,17R)-3,15,17-Trihydroxy-13-methyl-6,7,8,9,11,12,13,17-octahydro-16H-cyclopenta[a]phenanthren-16-one

  • Catalogue No.:PA 05 0211024

  • CAS :

    NA

  • Molecular Formula : C18H20O4

  • Molecular Weight : 300.35

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PA 05 0211025

(8R,9S,13R)-3,15-Dihydroxy-13-methyl-6,7,8,9,11,12,13,17-octahydro-16H-cyclopenta[a]phenanthren-16-one

(8R,9S,13R)-3,15-Dihydroxy-13-methyl-6,7,8,9,11,12,13,17-octahydro-16H-cyclopenta[a]phenanthren-16-one

  • Catalogue No.:PA 05 0211025

  • CAS :

    NA

  • Molecular Formula : C18H20O3

  • Molecular Weight : 284.36

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PA 05 0211026

Estriol 3-sulfate

Estriol 3-sulfate

  • Catalogue No.:PA 05 0211026

  • CAS :

    481-95-8

  • Molecular Formula : C18H24O6S

  • Molecular Weight : 368.44

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PA 05 0211027

(8R,9S,13S,14S,15R,16R,17R)-3-((tert-Butyldimethylsilyl)oxy)-13-methyl-7,8,9,11,12,13,14,15,16,17-decahydro-6H-cyclopenta[a]phenanthrene-15,16,17-triol

(8R,9S,13S,14S,15R,16R,17R)-3-((tert-Butyldimethylsilyl)oxy)-13-methyl-7,8,9,11,12,13,14,15,16,17-decahydro-6H-cyclopenta[a]phenanthrene-15,16,17-triol

  • Catalogue No.:PA 05 0211027

  • CAS :

    1426679-39-1

  • Molecular Formula : C24H38O4Si

  • Molecular Weight : 418.65

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PA 05 0211028

(8R,9S,13S,14S,15S,16S,17S)-13-Methyl-7,8,9,11,12,13,14,15,16,17-decahydro-6H-cyclopenta[a]phenanthrene-3,15,16,17-tetraol

(8R,9S,13S,14S,15S,16S,17S)-13-Methyl-7,8,9,11,12,13,14,15,16,17-decahydro-6H-cyclopenta[a]phenanthrene-3,15,16,17-tetraol

  • Catalogue No.:PA 05 0211028

  • CAS :

    NA

  • Molecular Formula : C18H24O4

  • Molecular Weight : 304.39

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PA 05 0211029

(8R,9S,13S,14S,15R,16R,17S)-13-Methyl-7,8,9,11,12,13,14,15,16,17-decahydro-6H-cyclopenta[a]phenanthrene-3,15,16,17-tetraol

(8R,9S,13S,14S,15R,16R,17S)-13-Methyl-7,8,9,11,12,13,14,15,16,17-decahydro-6H-cyclopenta[a]phenanthrene-3,15,16,17-tetraol

  • Catalogue No.:PA 05 0211029

  • CAS :

    NA

  • Molecular Formula : C18H24O4

  • Molecular Weight : 304.39

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