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.
stdClass Object ( [pname] => Estriol [catalogue_number] => PA 05 21000 [category_ids] => ,76,75,78,70,82,87, [chemical_name] => [weight] => 288.38 [form] => C18H24O3 [cas] => 50-27-1 [pslug] => 50-27-1-estriol-api-standards-pa0521000 [latest_product] => 0 [linkproducts] => 0 [offers_id] => [offers_name] => [offers_status] => [offers_start_date] => [offers_end_date] => [pageview] => [offers_slug] => [offers_product_id] => [offers_product_code] => [offers_master_id] => [offer_percentage] => [offers_product_main_cat] => )
Catalogue No.:PA 05 21000
CAS :
Molecular Formula : C18H24O3
Molecular Weight : 288.38
stdClass Object ( [pname] => Estriol - Impurity B [catalogue_number] => PA 05 21020 [category_ids] => ,76,75,87, [chemical_name] => [weight] => 270.37 [form] => C18H22O2 [cas] => 53-16-7 [pslug] => 53-16-7-estriol-impurity-b-pa0521020 [latest_product] => 0 [linkproducts] => 0 [offers_id] => [offers_name] => [offers_status] => [offers_start_date] => [offers_end_date] => [pageview] => [offers_slug] => [offers_product_id] => [offers_product_code] => [offers_master_id] => [offer_percentage] => [offers_product_main_cat] => )
Catalogue No.:PA 05 21020
Molecular Formula : C18H22O2
Molecular Weight : 270.37
stdClass Object ( [pname] => Estriol - Impurity C [catalogue_number] => PA 05 21030 [category_ids] => ,76,75,87, [chemical_name] => [weight] => 302.41 [form] => C19H26O3 [cas] => 1474-53-9 [pslug] => 1474-53-9-estriol-impurity-c-pa0521030 [latest_product] => 0 [linkproducts] => 0 [offers_id] => [offers_name] => [offers_status] => [offers_start_date] => [offers_end_date] => [pageview] => [offers_slug] => [offers_product_id] => [offers_product_code] => [offers_master_id] => [offer_percentage] => [offers_product_main_cat] => )
Catalogue No.:PA 05 21030
Molecular Formula : C19H26O3
Molecular Weight : 302.41
stdClass Object ( [pname] => Estriol - Impurity E [catalogue_number] => PA 05 21050 [category_ids] => ,76,75,78,70,82,87, [chemical_name] => [weight] => 288.38 [form] => C18H24O3 [cas] => 1228-72-4 [pslug] => 1228-72-4-estriol-impurity-e-pa0521050 [latest_product] => 0 [linkproducts] => 0 [offers_id] => [offers_name] => [offers_status] => [offers_start_date] => [offers_end_date] => [pageview] => [offers_slug] => [offers_product_id] => [offers_product_code] => [offers_master_id] => [offer_percentage] => [offers_product_main_cat] => )
Catalogue No.:PA 05 21050
stdClass Object ( [pname] => Estriol - Impurity F [catalogue_number] => PA 05 21060 [category_ids] => ,76,75,78,70,82,87, [chemical_name] => [weight] => 288.38 [form] => C18H24O3 [cas] => 547-81-9 [pslug] => 547-81-9-estriol-impurity-f-pa0521060 [latest_product] => 0 [linkproducts] => 0 [offers_id] => [offers_name] => [offers_status] => [offers_start_date] => [offers_end_date] => [pageview] => [offers_slug] => [offers_product_id] => [offers_product_code] => [offers_master_id] => [offer_percentage] => [offers_product_main_cat] => )
Catalogue No.:PA 05 21060
stdClass Object ( [pname] => Estriol - Impurity K [catalogue_number] => PA 05 21110 [category_ids] => ,76,75,78,70,82,87, [chemical_name] => [weight] => 312.40 [form] => C20H24O3 [cas] => 901-93-9 [pslug] => 901-93-9-estriol-impurity-k-pa0521110 [latest_product] => 0 [linkproducts] => 0 [offers_id] => [offers_name] => [offers_status] => [offers_start_date] => [offers_end_date] => [pageview] => [offers_slug] => [offers_product_id] => [offers_product_code] => [offers_master_id] => [offer_percentage] => [offers_product_main_cat] => )
Catalogue No.:PA 05 21110
Molecular Formula : C20H24O3
Molecular Weight : 312.40
stdClass Object ( [pname] => Estriol 3-Succinate [catalogue_number] => PA 05 21510 [category_ids] => ,78,70,82,87, [chemical_name] => [weight] => 388.45 [form] => C22H28O6 [cas] => 47575-61-1 [pslug] => 47575-61-1-estriol-3-succinate-pa0521510 [latest_product] => 0 [linkproducts] => 0 [offers_id] => [offers_name] => [offers_status] => [offers_start_date] => [offers_end_date] => [pageview] => [offers_slug] => [offers_product_id] => [offers_product_code] => [offers_master_id] => [offer_percentage] => [offers_product_main_cat] => )
Catalogue No.:PA 05 21510
Molecular Formula : C22H28O6
Molecular Weight : 388.45
stdClass Object ( [pname] => Estriol Trisulfate Trisodium Salt [catalogue_number] => PA 05 21520 [category_ids] => ,87, [chemical_name] => [weight] => 594.52 [form] => C18H21Na3O12S3 [cas] => 100940-55-4 [pslug] => 100940-55-4-estriol-trisulfate-trisodium-salt-pa0521520 [latest_product] => 0 [linkproducts] => 0 [offers_id] => [offers_name] => [offers_status] => [offers_start_date] => [offers_end_date] => [pageview] => [offers_slug] => [offers_product_id] => [offers_product_code] => [offers_master_id] => [offer_percentage] => [offers_product_main_cat] => )
Catalogue No.:PA 05 21520
Molecular Formula : C18H21Na3O12S3
Molecular Weight : 594.52
stdClass Object ( [pname] => 17-Iodo-3-O-methyl Estratetraenol [catalogue_number] => PA 05 21540 [category_ids] => ,78,70,82,87, [chemical_name] => [weight] => 394.29 [form] => C19H23IO [cas] => 105644-55-1 [pslug] => 105644-55-1-17-iodo-3-o-methyl-estratetraenol-pa0521540 [latest_product] => 0 [linkproducts] => 0 [offers_id] => [offers_name] => [offers_status] => [offers_start_date] => [offers_end_date] => [pageview] => [offers_slug] => [offers_product_id] => [offers_product_code] => [offers_master_id] => [offer_percentage] => [offers_product_main_cat] => )
Catalogue No.:PA 05 21540
Molecular Formula : C19H23IO
Molecular Weight : 394.29
stdClass Object ( [pname] => 3-O-Methyl Estrone Hydrazone [catalogue_number] => PA 05 21550 [category_ids] => ,78,70,82,87, [chemical_name] => [weight] => 298.42 [form] => C19H26N2O [cas] => 105663-60-3 [pslug] => 105663-60-3-3-o-methyl-estrone-hydrazone-pa0521550 [latest_product] => 0 [linkproducts] => 0 [offers_id] => [offers_name] => [offers_status] => [offers_start_date] => [offers_end_date] => [pageview] => [offers_slug] => [offers_product_id] => [offers_product_code] => [offers_master_id] => [offer_percentage] => [offers_product_main_cat] => )
Catalogue No.:PA 05 21550
Molecular Formula : C19H26N2O
Molecular Weight : 298.42
stdClass Object ( [pname] => 3-O-Methyl 6-Hydroxy-17β-estradiol 17-O-Tetrahydropyran [catalogue_number] => PA 05 21560 [category_ids] => ,78,70,82,87, [chemical_name] => [weight] => 386.52 [form] => C24H34O4 [cas] => 473882-84-7 [pslug] => 473882-84-7-3-o-methyl-6-hydroxy-17-beta-estradiol-17-o-tetrahydropyran-pa0521560 [latest_product] => 0 [linkproducts] => 0 [offers_id] => [offers_name] => [offers_status] => [offers_start_date] => [offers_end_date] => [pageview] => [offers_slug] => [offers_product_id] => [offers_product_code] => [offers_master_id] => [offer_percentage] => [offers_product_main_cat] => )
Catalogue No.:PA 05 21560
Molecular Formula : C24H34O4
Molecular Weight : 386.52
stdClass Object ( [pname] => 3-O-Benzyl Estriol [catalogue_number] => PA 05 21570 [category_ids] => ,78,70,82,76,75,87, [chemical_name] => [weight] => 378.5 [form] => C25H30O3 [cas] => 18650-87-8 [pslug] => 18650-87-8-3-o-benzyl-estriol-pa0521570 [latest_product] => 0 [linkproducts] => 0 [offers_id] => [offers_name] => [offers_status] => [offers_start_date] => [offers_end_date] => [pageview] => [offers_slug] => [offers_product_id] => [offers_product_code] => [offers_master_id] => [offer_percentage] => [offers_product_main_cat] => )
Catalogue No.:PA 05 21570
Molecular Formula : C25H30O3
Molecular Weight : 378.5
stdClass Object ( [pname] => 2-Methoxy 17β-Estradiol [catalogue_number] => PA 05 21580 [category_ids] => ,76,75,78,70,82,87, [chemical_name] => [weight] => 302.41 [form] => C19H26O3 [cas] => 362-07-2 [pslug] => 362-07-2-2-methoxy-17-beta-estradiol-pa0521580 [latest_product] => 0 [linkproducts] => 0 [offers_id] => [offers_name] => [offers_status] => [offers_start_date] => [offers_end_date] => [pageview] => [offers_slug] => [offers_product_id] => [offers_product_code] => [offers_master_id] => [offer_percentage] => [offers_product_main_cat] => )
Catalogue No.:PA 05 21580
stdClass Object ( [pname] => 1,3,5(10)-Estratrien-2,3,4,17beta-tetrol-2,4-dimethyl Ether [catalogue_number] => PA 05 21590 [category_ids] => ,76,75,78,70,82,87, [chemical_name] => [weight] => 332.43 [form] => C20H28O4 [cas] => 65968-99-2 [pslug] => 65968-99-2-1-3-5-10-estratrien-2-3-4-17beta-tetrol-2-4-dimethyl-ether-pa0521590 [latest_product] => 0 [linkproducts] => 0 [offers_id] => [offers_name] => [offers_status] => [offers_start_date] => [offers_end_date] => [pageview] => [offers_slug] => [offers_product_id] => [offers_product_code] => [offers_master_id] => [offer_percentage] => [offers_product_main_cat] => )
Catalogue No.:PA 05 21590
Molecular Formula : C20H28O4
Molecular Weight : 332.43
stdClass Object ( [pname] => Estriol - Impurity H [catalogue_number] => PA 05 22620 [category_ids] => ,76,75,78,70,82,87, [chemical_name] => [weight] => 286.37 [form] => C18H22O3 [cas] => 566-76-7 [pslug] => 566-76-7-estriol-impurity-h-pa0522620 [latest_product] => 0 [linkproducts] => 0 [offers_id] => [offers_name] => [offers_status] => [offers_start_date] => [offers_end_date] => [pageview] => [offers_slug] => [offers_product_id] => [offers_product_code] => [offers_master_id] => [offer_percentage] => [offers_product_main_cat] => )
Catalogue No.:PA 05 22620
Molecular Formula : C18H22O3
Molecular Weight : 286.37
stdClass Object ( [pname] => 3-O-Benzyl Estriol-d1 [catalogue_number] => PA STI 011420 [category_ids] => ,78,70,82,76,75,87,98, [chemical_name] => [weight] => 379.51 [form] => C25H29DO3 [cas] => 1366363-19-0 [pslug] => 1366363-19-0-3-o-benzyl-estriol-d1-pasti011420 [latest_product] => 0 [linkproducts] => 0 [offers_id] => [offers_name] => [offers_status] => [offers_start_date] => [offers_end_date] => [pageview] => [offers_slug] => [offers_product_id] => [offers_product_code] => [offers_master_id] => [offer_percentage] => [offers_product_main_cat] => )
Catalogue No.:PA STI 011420
Molecular Formula : C25H29DO3
Molecular Weight : 379.51
stdClass Object ( [pname] => Estetrol [catalogue_number] => PA 05 0211013 [category_ids] => ,75,76,78,70,82,87, [chemical_name] => [weight] => 304.39 [form] => C18H24O4 [cas] => 15183-37-6 [pslug] => 15183-37-6-estetrol-pa050211013 [latest_product] => 0 [linkproducts] => 1 [offers_id] => [offers_name] => [offers_status] => [offers_start_date] => [offers_end_date] => [pageview] => [offers_slug] => [offers_product_id] => [offers_product_code] => [offers_master_id] => [offer_percentage] => [offers_product_main_cat] => )
Catalogue No.:PA 05 0211013
Molecular Formula : C18H24O4
Molecular Weight : 304.39
stdClass Object ( [pname] => 15,16-Deshydroxy 3-O-Benzyl Estetrol 17-Acetate [catalogue_number] => PA 05 0211014 [category_ids] => ,76,75,78,70,82,87, [chemical_name] => [weight] => 402.53 [form] => C27H30O3 [cas] => 690996-25-9 [pslug] => 690996-25-9-15-16-deshydroxy-3-o-benzyl-estetrol-17-acetate-pa050211014 [latest_product] => 0 [linkproducts] => 0 [offers_id] => [offers_name] => [offers_status] => [offers_start_date] => [offers_end_date] => [pageview] => [offers_slug] => [offers_product_id] => [offers_product_code] => [offers_master_id] => [offer_percentage] => [offers_product_main_cat] => )
Catalogue No.:PA 05 0211014
Molecular Formula : C27H30O3
Molecular Weight : 402.53
stdClass Object ( [pname] => 3-O-Benzyl Estetrol 17-Acetate [catalogue_number] => PA 05 0211015 [category_ids] => ,76,75,78,70,82,87, [chemical_name] => [weight] => 436.55 [form] => C27H32O5 [cas] => 690996-24-8 [pslug] => 690996-24-8-3-o-benzyl-estetrol-17-acetate-pa050211015 [latest_product] => 0 [linkproducts] => 0 [offers_id] => [offers_name] => [offers_status] => [offers_start_date] => [offers_end_date] => [pageview] => [offers_slug] => [offers_product_id] => [offers_product_code] => [offers_master_id] => [offer_percentage] => [offers_product_main_cat] => )
Catalogue No.:PA 05 0211015
Molecular Formula : C27H32O5
Molecular Weight : 436.55
stdClass Object ( [pname] => Estetrol 17-Acetate [catalogue_number] => PA 05 0211016 [category_ids] => ,76,75,78,70,82,87, [chemical_name] => [weight] => 346.42 [form] => C20H26O5 [cas] => 690996-23-7 [pslug] => 690996-23-7-estetrol-17-acetate-pa050211016 [latest_product] => 0 [linkproducts] => 0 [offers_id] => [offers_name] => [offers_status] => [offers_start_date] => [offers_end_date] => [pageview] => [offers_slug] => [offers_product_id] => [offers_product_code] => [offers_master_id] => [offer_percentage] => [offers_product_main_cat] => )
Catalogue No.:PA 05 0211016
Molecular Formula : C20H26O5
Molecular Weight : 346.42
stdClass Object ( [pname] => 2,4-Dibromo Estetrol [catalogue_number] => PA 05 0211017 [category_ids] => ,76,75,78,70,82,87, [chemical_name] => [weight] => 462.18 [form] => C18H22Br2O4 [cas] => NA [pslug] => 2-4-dibromo-estetrol-pa050211017 [latest_product] => 0 [linkproducts] => 0 [offers_id] => [offers_name] => [offers_status] => [offers_start_date] => [offers_end_date] => [pageview] => [offers_slug] => [offers_product_id] => [offers_product_code] => [offers_master_id] => [offer_percentage] => [offers_product_main_cat] => )
Catalogue No.:PA 05 0211017
Molecular Formula : C18H22Br2O4
Molecular Weight : 462.18
stdClass Object ( [pname] => Estetrol Monohydrate [catalogue_number] => PA 05 0211018 [category_ids] => ,75,76,78,70,82,87, [chemical_name] => [weight] => 322.4 [form] => C18H26O5 [cas] => 2055649-81-3 [pslug] => 2055649-81-3-estetrol-monohydrate-pa050211018 [latest_product] => 0 [linkproducts] => 1 [offers_id] => [offers_name] => [offers_status] => [offers_start_date] => [offers_end_date] => [pageview] => [offers_slug] => [offers_product_id] => [offers_product_code] => [offers_master_id] => [offer_percentage] => [offers_product_main_cat] => )
Catalogue No.:PA 05 0211018
Molecular Formula : C18H26O5
Molecular Weight : 322.4
stdClass Object ( [pname] => (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_number] => PA 05 0211019 [category_ids] => ,76,75,78,70,82,87, [chemical_name] => [weight] => 504.22 [form] => C20H24Br2O5 [cas] => NA [pslug] => 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-pa050211019 [latest_product] => 0 [linkproducts] => 0 [offers_id] => [offers_name] => [offers_status] => [offers_start_date] => [offers_end_date] => [pageview] => [offers_slug] => [offers_product_id] => [offers_product_code] => [offers_master_id] => [offer_percentage] => [offers_product_main_cat] => )
Catalogue No.:PA 05 0211019
Molecular Formula : C20H24Br2O5
Molecular Weight : 504.22
stdClass Object ( [pname] => Estriol 16α-(β-D-Glucuronide) Sodium Salt [catalogue_number] => PA 05 0211020 [category_ids] => ,70,75,76,78,82,87,95, [chemical_name] => [weight] => 487.5 [form] => C24H32NaO9 [cas] => 1852-44-4 [pslug] => 1852-44-4-estriol-16alpha-beta-d-glucuronide-sodium-salt-pa050211020 [latest_product] => 0 [linkproducts] => 0 [offers_id] => [offers_name] => [offers_status] => [offers_start_date] => [offers_end_date] => [pageview] => [offers_slug] => [offers_product_id] => [offers_product_code] => [offers_master_id] => [offer_percentage] => [offers_product_main_cat] => )
Catalogue No.:PA 05 0211020
Molecular Formula : C24H32NaO9
Molecular Weight : 487.5
stdClass Object ( [pname] => (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_number] => PA 05 0211023 [category_ids] => ,76,75,78,70,82,87, [chemical_name] => [weight] => 304.39 [form] => C18H24O4 [cas] => 58001-91-5 [pslug] => 58001-91-5-8r-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-pa050211023 [latest_product] => 0 [linkproducts] => 0 [offers_id] => [offers_name] => [offers_status] => [offers_start_date] => [offers_end_date] => [pageview] => [offers_slug] => [offers_product_id] => [offers_product_code] => [offers_master_id] => [offer_percentage] => [offers_product_main_cat] => )
Catalogue No.:PA 05 0211023
stdClass Object ( [pname] => (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_number] => PA 05 0211024 [category_ids] => ,75,76,78,70,82,87, [chemical_name] => [weight] => 300.35 [form] => C18H20O4 [cas] => NA [pslug] => 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-pa050211024 [latest_product] => 0 [linkproducts] => 0 [offers_id] => [offers_name] => [offers_status] => [offers_start_date] => [offers_end_date] => [pageview] => [offers_slug] => [offers_product_id] => [offers_product_code] => [offers_master_id] => [offer_percentage] => [offers_product_main_cat] => )
Catalogue No.:PA 05 0211024
Molecular Formula : C18H20O4
Molecular Weight : 300.35
stdClass Object ( [pname] => (8R,9S,13R)-3,15-Dihydroxy-13-methyl-6,7,8,9,11,12,13,17-octahydro-16H-cyclopenta[a]phenanthren-16-one [catalogue_number] => PA 05 0211025 [category_ids] => ,75,76,78,70,82,87, [chemical_name] => [weight] => 284.36 [form] => C18H20O3 [cas] => NA [pslug] => 8r-9s-13r-3-15-dihydroxy-13-methyl-6-7-8-9-11-12-13-17-octahydro-16h-cyclopenta-a-phenanthren-16-one-pa050211025 [latest_product] => 0 [linkproducts] => 0 [offers_id] => [offers_name] => [offers_status] => [offers_start_date] => [offers_end_date] => [pageview] => [offers_slug] => [offers_product_id] => [offers_product_code] => [offers_master_id] => [offer_percentage] => [offers_product_main_cat] => )
Catalogue No.:PA 05 0211025
Molecular Formula : C18H20O3
Molecular Weight : 284.36
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