Estradiol-impurities | Pharmaffiliates

estradiol and its Impurities

Estradiol is used to treat menopause symptoms such as hot flashes and vaginal changes, and to prevent osteoporosis in menopausal women. It is used as a medication. Reference standards of Estradiol API,and its pharmacopeial, non pharmacopeial impurities, and stable isotopes are listed below.

Displaying 72 results for estradiol Impurities
PA 05 45510

Estradiol 3-Enanthate

Estradiol 3-Enanthate


  • Catalogue No.:PA 05 45510

  • CAS :

    55540-97-1

  • Molecular Formula : C25H36O3

  • Molecular Weight : 384.56

PA 05 45520

6,7-Dehydro Estradiol

6,7-Dehydro Estradiol


  • Catalogue No.:PA 05 45520

  • CAS :

    7291-41-0

  • Molecular Formula : C18H22O2

  • Molecular Weight : 270.37

PA 05 45530

6α-Hydroxyestradiol

6α-Hydroxyestradiol


  • Catalogue No.:PA 05 45530

  • CAS :

    1229-24-9

  • Molecular Formula : C18H24O3

  • Molecular Weight : 288.38

PA 05 45540

6β-Hydroxy 17β-Estradiol

6β-Hydroxy 17β-Estradiol


  • Catalogue No.:PA 05 45540

  • CAS :

    3583-03-7

  • Molecular Formula : C18H24O3

  • Molecular Weight : 288.39

PA 05 45550

5'-Hydroxy Drospirenone

5'-Hydroxy Drospirenone


  • Catalogue No.:PA 05 45550

  • CAS :

    863329-71-9

  • Molecular Formula : C24H32O3

  • Molecular Weight : 368.51

PA 05 45560

β-Estradiol 17-Acetate

β-Estradiol 17-Acetate


  • Catalogue No.:PA 05 45560

  • CAS :

    1743-60-8

  • Molecular Formula : C20H26O3

  • Molecular Weight : 314.42

PA 05 45570

Estradiol 3-Propyl Ether

Estradiol 3-Propyl Ether


  • Catalogue No.:PA 05 45570

  • CAS :

    22034-63-5

  • Molecular Formula : C21H30O2

  • Molecular Weight : 314.46

PA 05 45580

3-O-Methyl Estradiol

3-O-Methyl Estradiol


  • Catalogue No.:PA 05 45580

  • CAS :

    1035-77-4

  • Molecular Formula : C19H26O2

  • Molecular Weight : 286.41

PA 05 45590

17β-Estradiol Dimethyl Ether

17β-Estradiol Dimethyl Ether


  • Catalogue No.:PA 05 45590

  • CAS :

    4954-14-7

  • Molecular Formula : C20H28O2

  • Molecular Weight : 300.44

PA 05 45600

6-Keto-17β-Estradiol

6-Keto-17β-Estradiol


  • Catalogue No.:PA 05 45600

  • CAS :

    571-92-6

  • Molecular Formula : C18H22O3

  • Molecular Weight : 286.37

PA 05 45610

16-Keto 17β-Estradiol

16-Keto 17β-Estradiol


  • Catalogue No.:PA 05 45610

  • CAS :

    566-75-6

  • Molecular Formula : C18H22O3

  • Molecular Weight : 286.37

PA 05 20520

4-Methyl Estradiol Enanthate Impurity

4-Methyl Estradiol Enanthate Impurity


  • Catalogue No.:PA 05 20520

  • CAS :

    NA

  • Molecular Formula : C26H38O3

  • Molecular Weight : 398.58

PA 05 20530

Delta-9(11)-Estradiol 17-Enanthate

Delta-9(11)-Estradiol 17-Enanthate


  • Catalogue No.:PA 05 20530

  • CAS :

    95960-05-7

  • Molecular Formula : C25H34O3

  • Molecular Weight : 382.54

PA 05 20540

17α-Estradiol 17-Valerate

17α-Estradiol 17-Valerate


  • Catalogue No.:PA 05 20540

  • CAS :

    182624-54-0

  • Molecular Formula : C23H32O3

  • Molecular Weight : 356.5

PA STI 061520

2-Methyl Estradiol-d3

2-Methyl Estradiol-d3


  • Catalogue No.:PA STI 061520

  • CAS :

    NA

  • Molecular Formula : C19H23D3O2

  • Molecular Weight : 289.43

PA STI 061530

4-Methyl Estradiol-d3

4-Methyl Estradiol-d3


  • Catalogue No.:PA STI 061530

  • CAS :

    NA

  • Molecular Formula : C19H23D3O2

  • Molecular Weight : 289.43

PA STI 061540

3-O-Methyl Estradiol-d3

3-O-Methyl Estradiol-d3


  • Catalogue No.:PA STI 061540

  • CAS :

    57983-88-7

  • Molecular Formula : C19H23D3O2

  • Molecular Weight : 289.43

PA STI 061550

3-O-Methyl Estradiol-d5

3-O-Methyl Estradiol-d5


  • Catalogue No.:PA STI 061550

  • CAS :

    NA

  • Molecular Formula : C19H21D5O2

  • Molecular Weight : 291.44

PA STI 061560

3-O-Methyl 17β-Estradiol-d5 17-O-Tetrahydropyran (Mixture of Diastereomers)

3-O-Methyl 17β-Estradiol-d5 17-O-Tetrahydropyran (Mixture of Diastereomers)


  • Catalogue No.:PA STI 061560

  • CAS :

    NA

  • Molecular Formula : C24H29D5O3

  • Molecular Weight : 375.56

PA STI 062030

3-O-Methyl 6-Hydroxy-17β-estradiol-d3 17-O-Tetrahydropyran

3-O-Methyl 6-Hydroxy-17β-estradiol-d3 17-O-Tetrahydropyran


  • Catalogue No.:PA STI 062030

  • CAS :

    NA

  • Molecular Formula : C24H31D3O4

  • Molecular Weight : 389.54

PA STI 062370

3-O-Methyl 6-Keto 17β-Estradiol-d2 17-O-Tetrahydropyran

3-O-Methyl 6-Keto 17β-Estradiol-d2 17-O-Tetrahydropyran


  • Catalogue No.:PA STI 062370

  • CAS :

    NA

  • Molecular Formula : C24H30D2O4

  • Molecular Weight : 386.52

PA STI 048770

2-Hydroxy-17β-estradiol-16,16,17-d5

2-Hydroxy-17β-estradiol-16,16,17-d5


  • Catalogue No.:PA STI 048770

  • CAS :

    221093-33-0

  • Molecular Formula : C18H19D5O3

  • Molecular Weight : 293.41

PA STI 048780

4-Hydroxy-17β-estradiol-16,16,17-d5

4-Hydroxy-17β-estradiol-16,16,17-d5


  • Catalogue No.:PA STI 048780

  • CAS :

    221093-38-5

  • Molecular Formula : C18H19D5O3

  • Molecular Weight : 293.41

PA STI 055000

16-Keto 17β-Estradiol-d5 (Major)

16-Keto 17β-Estradiol-d5 (Major)


  • Catalogue No.:PA STI 055000

  • CAS :

    NA

  • Molecular Formula : C18H17D5O3

  • Molecular Weight : 291.4

PA STI 059340

2-Methoxy-d3 17β-Estradiol

2-Methoxy-d3 17β-Estradiol


  • Catalogue No.:PA STI 059340

  • CAS :

    NA

  • Molecular Formula : C19H23D3O3

  • Molecular Weight : 305.43

PA STI 059350

2-Methoxy 17β-Estradiol-16,16,17-d3

2-Methoxy 17β-Estradiol-16,16,17-d3


  • Catalogue No.:PA STI 059350

  • CAS :

    NA

  • Molecular Formula : C19H23D3O3

  • Molecular Weight : 305.43

PA STI 059360

4-Methoxy-d3 17β-estradiol

4-Methoxy-d3 17β-estradiol


  • Catalogue No.:PA STI 059360

  • CAS :

    1334143-12-2

  • Molecular Formula : C19H23D3O3

  • Molecular Weight : 305.43

PA STI 059370

4-Methoxy 17β-Estradiol-16,16,17-d3

4-Methoxy 17β-Estradiol-16,16,17-d3


  • Catalogue No.:PA STI 059370

  • CAS :

    NA

  • Molecular Formula : C19H23D3O3

  • Molecular Weight : 305.43

PA STI 059500

2-(Methoxymethoxy)-1,3-propanediyl Dibenzoate-d5

2-(Methoxymethoxy)-1,3-propanediyl Dibenzoate-d5


  • Catalogue No.:PA STI 059500

  • CAS :

    1346601-25-9

  • Molecular Formula : C19H15D5O6

  • Molecular Weight : 349.39

PA 05 45620

[1S-(1α,3aβ,4β,7aα)]-4-[2-(2,5-Dihydroxyphenyl)ethyl]octahydro-1-hydroxy-7a-methyl-5H-inden-5-one

[1S-(1α,3aβ,4β,7aα)]-4-[2-(2,5-Dihydroxyphenyl)ethyl]octahydro-1-hydroxy-7a-methyl-5H-inden-5-one


  • Catalogue No.:PA 05 45620

  • CAS :

    57780-81-1

  • Molecular Formula : C18H24O4

  • Molecular Weight : 304.39

PA 05 45630

17β-Acetyl-estradiol 3-(Tri-O-acetyl-β-D-glucuronic Acid Methyl Ester)

17β-Acetyl-estradiol 3-(Tri-O-acetyl-β-D-glucuronic Acid Methyl Ester)


  • Catalogue No.:PA 05 45630

  • CAS :

    59495-70-4

  • Molecular Formula : C33H42O12

  • Molecular Weight : 630.68

PA 05 45640

17-O-Acetyl-3-O-methyl-6-oxo 17β-Estradiol

17-O-Acetyl-3-O-methyl-6-oxo 17β-Estradiol


  • Catalogue No.:PA 05 45640

  • CAS :

    20823-31-8

  • Molecular Formula : C21H26O4

  • Molecular Weight : 342.43

PA 05 45650

17-O-Acetyl-3-O-methyl 17β-Estradiol

17-O-Acetyl-3-O-methyl 17β-Estradiol


  • Catalogue No.:PA 05 45650

  • CAS :

    5976-55-6

  • Molecular Formula : C21H28O3

  • Molecular Weight : 328.45

PA 05 45660

3-(Acetyloxy)-1-methylestra-1,3,5(10),6-tetraen-17-one

3-(Acetyloxy)-1-methylestra-1,3,5(10),6-tetraen-17-one


  • Catalogue No.:PA 05 45660

  • CAS :

    53-55-4

  • Molecular Formula : C21H24O3

  • Molecular Weight : 324.41

PA 05 45670

2-Allyl-estrone

2-Allyl-estrone


  • Catalogue No.:PA 05 45670

  • CAS :

    10506-80-6

  • Molecular Formula : C21H26O2

  • Molecular Weight : 310.43

PA 05 45680

4-Allyl-estrone Acetate

4-Allyl-estrone Acetate


  • Catalogue No.:PA 05 45680

  • CAS :

    56931-53-4

  • Molecular Formula : C23H28O3

  • Molecular Weight : 352.47

PA EPE1600000

Estradiol benzoate (E1600000)

Estradiol benzoate (E1600000)


  • Catalogue No.:PA EPE1600000

  • CAS :

    NA

  • Molecular Formula : NA

  • Molecular Weight : NA

PA EPE1620000

Estradiol hemihydrate (E1620000)

Estradiol hemihydrate (E1620000)


  • Catalogue No.:PA EPE1620000

  • CAS :

    NA

  • Molecular Formula : NA

  • Molecular Weight : NA

PA JP0075

Estradiol Benzoate (JP 0075)

Estradiol Benzoate (JP 0075)


  • Catalogue No.:PA JP0075

  • CAS :

    NA

  • Molecular Formula : NA

  • Molecular Weight : NA

PA EPY0000046

Estradiol valerate (Y0000046)

Estradiol valerate (Y0000046)


  • Catalogue No.:PA EPY0000046

  • CAS :

    NA

  • Molecular Formula : NA

  • Molecular Weight : NA

PA EPY0000314

Estradiol for peak identification (Y0000314)

Estradiol for peak identification (Y0000314)


  • Catalogue No.:PA EPY0000314

  • CAS :

    NA

  • Molecular Formula : NA

  • Molecular Weight : NA

PA EPY0000852

Estradiol benzoate for system suitability (Y0000852)

Estradiol benzoate for system suitability (Y0000852)


  • Catalogue No.:PA EPY0000852

  • CAS :

    NA

  • Molecular Formula : NA

  • Molecular Weight : NA

PA EPY0001823

Estradiol valerate for system suitability (Y0001823)

Estradiol valerate for system suitability (Y0001823)


  • Catalogue No.:PA EPY0001823

  • CAS :

    NA

  • Molecular Formula : NA

  • Molecular Weight : NA

PA USP1250008

Estradiol (1250008)

Estradiol (1250008)


  • Catalogue No.:PA USP1250008

  • CAS :

    35380-71-3

  • Molecular Formula : NA

  • Molecular Weight : NA

PA USP1250020

Estradiol Related Compound B (1,3,5(10),6-estratetraen-3,17beta-diol) (1250020)

Estradiol Related Compound B (1,3,5(10),6-estratetraen-3,17beta-diol) (1250020)


  • Catalogue No.:PA USP1250020

  • CAS :

    7291-41-0

  • Molecular Formula : NA

  • Molecular Weight : NA

PA USP1250041

Estradiol Related Compound C (1,3,5(10)-estratrien-3,17beta-diol-6-one) (1250041)

Estradiol Related Compound C (1,3,5(10)-estratrien-3,17beta-diol-6-one) (1250041)


  • Catalogue No.:PA USP1250041

  • CAS :

    571-92-6

  • Molecular Formula : NA

  • Molecular Weight : NA

PA USP1251000

Estradiol Benzoate (1251000)

Estradiol Benzoate (1251000)


  • Catalogue No.:PA USP1251000

  • CAS :

    50-50-0

  • Molecular Formula : NA

  • Molecular Weight : NA

PA USP1252003

Estradiol Cypionate (1252003)

Estradiol Cypionate (1252003)


  • Catalogue No.:PA USP1252003

  • CAS :

    313-06-4

  • Molecular Formula : NA

  • Molecular Weight : NA

PA USP1252193

Estradiol Cypionate System Suitability Mixture (1252193)

Estradiol Cypionate System Suitability Mixture (1252193)


  • Catalogue No.:PA USP1252193

  • CAS :

    NA

  • Molecular Formula : NA

  • Molecular Weight : NA

PA USP1254009

Estradiol Valerate (1254009)

Estradiol Valerate (1254009)


  • Catalogue No.:PA USP1254009

  • CAS :

    979-32-8

  • Molecular Formula : NA

  • Molecular Weight : NA

PA USP1260001

Ethinyl Estradiol (1260001)

Ethinyl Estradiol (1260001)


  • Catalogue No.:PA USP1260001

  • CAS :

    57-63-6

  • Molecular Formula : NA

  • Molecular Weight : NA

PA USP1260012

Ethinyl Estradiol Related Compound A (6-Keto-ethinyl estradiol) (1260012)

Ethinyl Estradiol Related Compound A (6-Keto-ethinyl estradiol) (1260012)


  • Catalogue No.:PA USP1260012

  • CAS :

    NA

  • Molecular Formula : NA

  • Molecular Weight : NA

PA USP1260023

Ethinyl Estradiol Related Compound B (19-Nor-17alpha-pregna-1,3,5(10),9(11)-tetraen-20-yne-3,17-dio (1260023)

Ethinyl Estradiol Related Compound B (19-Nor-17alpha-pregna-1,3,5(10),9(11)-tetraen-20-yne-3,17-dio (1260023)


  • Catalogue No.:PA USP1260023

  • CAS :

    1231-96-5

  • Molecular Formula : NA

  • Molecular Weight : NA

PA BP396RB

estradiol benzoate (396RB)

estradiol benzoate (396RB)


  • Catalogue No.:PA BP396RB

  • CAS :

    NA

  • Molecular Formula : NA

  • Molecular Weight : NA

PA BP729RB

estradiol hemihydrate (729RB)

estradiol hemihydrate (729RB)


  • Catalogue No.:PA BP729RB

  • CAS :

    NA

  • Molecular Formula : NA

  • Molecular Weight : NA

PA 05 45690

Methyl 3α,7α-Diacetoxy-12-oxo-5β-cholan-24-oate

Methyl 3α,7α-Diacetoxy-12-oxo-5β-cholan-24-oate


  • Catalogue No.:PA 05 45690

  • CAS :

    28535-81-1

  • Molecular Formula : C29H44O7

  • Molecular Weight : 504.66

PA 05 45700

18-Nor-17β-estradiol

18-Nor-17β-estradiol


  • Catalogue No.:PA 05 45700

  • CAS :

    15093-14-8

  • Molecular Formula : C17H22O2

  • Molecular Weight : 258.36

PA STI 088291

17β-Estradiol-2,4,16,16,17-d5

17β-Estradiol-2,4,16,16,17-d5


  • Catalogue No.:PA STI 088291

  • CAS :

    221093-45-4

  • Molecular Formula : C18H19D5O2

  • Molecular Weight : 277.42

PA STI 088473

Δ8,9-Dehydro-17β-estradiol-16,16,17-d3

Δ8,9-Dehydro-17β-estradiol-16,16,17-d3


  • Catalogue No.:PA STI 088473

  • CAS :

    NA

  • Molecular Formula : C18H19D3O2

  • Molecular Weight : 273.39

PA STI 088477

17β-Estradiol-16,16,17-d3 3-Benzoate

17β-Estradiol-16,16,17-d3 3-Benzoate


  • Catalogue No.:PA STI 088477

  • CAS :

    1192354-74-7

  • Molecular Formula : C25H25D3O3

  • Molecular Weight : 379.51

PA STI 088478

17β-Estradiol-2,4,16,16-d4 17-Pentanoate

17β-Estradiol-2,4,16,16-d4 17-Pentanoate


  • Catalogue No.:PA STI 088478

  • CAS :

    NA

  • Molecular Formula : C23H28D4O3

  • Molecular Weight : 360.53

PA STI 088492

16-Keto-17β-estradiol-2,4,15,15,17-d5

16-Keto-17β-estradiol-2,4,15,15,17-d5


  • Catalogue No.:PA STI 088492

  • CAS :

    NA

  • Molecular Formula : C18H17D5O3

  • Molecular Weight : 291.4

PA STI 088493

4-Methoxy-17β-estradiol-1,2,16,16,17-d5

4-Methoxy-17β-estradiol-1,2,16,16,17-d5


  • Catalogue No.:PA STI 088493

  • CAS :

    NA

  • Molecular Formula : C19H21D5O3

  • Molecular Weight : 307.44

PA 05 0451000

Estradiol 3-Sulfate 17β-Glucuronide Dipotassium Salt

Estradiol 3-Sulfate 17β-Glucuronide Dipotassium Salt


  • Catalogue No.:PA 05 0451000

  • CAS :

    10392-35-5

  • Molecular Formula : C24H30K2O11S

  • Molecular Weight : 604.75

PA 05 0451001

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

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


  • Catalogue No.:PA 05 0451001

  • CAS :

    499985-15-8 

  • Molecular Formula : C24H36O2

  • Molecular Weight : 356.55

PA 05 0201000

Estradiol Valerate Identification Mixture

Estradiol Valerate Identification Mixture


  • Catalogue No.:PA 05 0201000

  • CAS :

    NA

  • Molecular Formula : NA

  • Molecular Weight : NA

PA 05 1501000

17α-4’-Benzyloxybenzyl Estradiol

17α-4’-Benzyloxybenzyl Estradiol


  • Catalogue No.:PA 05 1501000

  • CAS :

    1215115-97-1

  • Molecular Formula : C31H34O3

  • Molecular Weight : 454.61

PA 05 0201001

6β-Hydroxy-17β-estradiol 17-Valerate

6β-Hydroxy-17β-estradiol 17-Valerate


  • Catalogue No.:PA 05 0201001

  • CAS :

    1313382-32-9

  • Molecular Formula : C23H32O4

  • Molecular Weight : 372.51

PA 05 0201002

(6S,8R,9S,13S,14S,17S)-3,6-Dihydroxy-13-methyl-7,8,9,11,12,13,14,15,16,17-decahydro-6H-cyclopenta[a]phenanthren-17-yl pentanoate

(6S,8R,9S,13S,14S,17S)-3,6-Dihydroxy-13-methyl-7,8,9,11,12,13,14,15,16,17-decahydro-6H-cyclopenta[a]phenanthren-17-yl pentanoate


  • Catalogue No.:PA 05 0201002

  • CAS :

    1313382-26-1

  • Molecular Formula : C23H32O4

  • Molecular Weight : 372.51

PA 05 0201003

6-Oxo-17β-estradiol 17-Valerate

6-Oxo-17β-estradiol 17-Valerate


  • Catalogue No.:PA 05 0201003

  • CAS :

    1313382-51-2

  • Molecular Formula : C23H30O4

  • Molecular Weight : 370.49

PA 05 0451002

(8R,9S,13S,14S,17R)-13-Methyl-7,8,9,11,12,13,14,17-octahydro-6H-cyclopenta[a]phenanthrene-3,17-diol

(8R,9S,13S,14S,17R)-13-Methyl-7,8,9,11,12,13,14,17-octahydro-6H-cyclopenta[a]phenanthrene-3,17-diol


  • Catalogue No.:PA 05 0451002

  • CAS :

    59126-69-1

  • Molecular Formula : C18H22O2

  • Molecular Weight : 270.37

PA STI 089200

Estradiol-13C6

Estradiol-13C6


  • Catalogue No.:PA STI 089200

  • CAS :

    1075720-58-9

  • Molecular Formula : C1213C6H24O2

  • Molecular Weight : 278.34