Product name	Estriol
CAS NO	50-27-1
Purity	99%
MF	C18H24O3
MW	288.38
EINECS	200-022-2
Appearance	White Powder
Usage	Anti estrogen steroids , primary estrogen in urine . A metabolite of Estradiol . used to treat leukopenia , also have a certain effect for prostatic hypertrophy , prostate cancer .
Synonyms	TRIDESTRIN;(16-alpha,17-beta)-estra-1,3,5(10)-triene-3,16,17-triol;(16alpha,17beta)-Estra-1,3,5(10)-triene-3,16,17-triol;(16-alpha,17-beta)-oestra-1,3,5(10)-triene-3,16,17-triol;(16alpha,17beta)-Oestra-1,3,5(10)-triene-3,16,17-triol;1,3,5-estratriene-3-beta,16-alpha,17-beta-triol;1,3,5-Estratriene-3beta,16-alpha,17-beta-triol;1,3,5-oestratriene-3-beta,16-alpha,17-beta-triol
Categories	Steroids;Hormone;Biochemistry;Hydroxysteroids;Intermediates&Fine-Chemicals;Metabolites&Impurities;Pharmaceuticals;Steroid-and-Hormone;API;THEELOL;Hormone Drugs;Inhibitors

Items of analysis	Specification	Results
Appearance	White to practically white, odorless, crystalline powder.	white crystalline powder, odorless
Identification	A:IR B:UV	Conforms
Melting point	About280ºC	281.5ºC
Solubility	Insoluble in water; sparingly soluble in alcohol; soluble in acetone, in chloroform, in dioxane, in ether, and in vegetable oils	Conforms
Completeness of solution	The solution is clear and free from undissolved solid.	Conforms
Loss on drying	≤0.5%	0.26%
Specific optical rotation	+54°~ +62°	+57.07°
Total impurities	≤2.0%	Conforms
Residue on ignition	≤0.1%	0.06%
Assay	Assay	98.63%
Conclusion	Qualified

estriol;Estriol (E3);oestriol

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