Name: China Source Factory Supply High Quality Estriol CAS 50-27-1 with Best Price
Brand: Wuhan Fortuna Chemical Co., Ltd.

Specifications of Estriol CAS 50-27-1

Items	Specifications	Results
Appearance	White or practically white powder	Conforms
Identification	A:IR B:UV	Conforms
Completeness of solution	The solution is clear and free from undissolved solid.	Conforms
Solubility	Soluble in acetone,in chloroform,in dioxane,in ether and in vegetable oil,sparingly soluble,in ethanol,insoluble in water	Conforms
Melting point	About 280℃	279.2-281.0℃
Loss on drying	≤0.50％	0.12%
Specific rotation	+54°~ +62°	+56.4°
Residual on ignition	≤0.10％	0.04%
Related substances Total impurities	≤2.0％	0.63%
Residual solvents: Methanol Acetone Methylene chloride	≤3000ppm ≤5000ppm ≤600ppm	161 ppm 122 ppm Not detected
Assay	97.0~102.0%	99.66%
Micron	100%≤20um	100%≤20um
Conclusion	The product complies with the enterprise standards.

Parameters of Estriol CAS 50-27-1

Product parameters
Cas number:	50-27-1
Appearance:	White or practically white ,odorless powder
Purity:	97.0%～102.0%
Package details:	1kg/bag;25kg/drum
Brand:	Fortunachem

Estriol is a weak, naturally occurring estrogen hormone primarily produced by the ovaries (in premenopausal women) and the placenta (during pregnancy). It belongs to the three main types of estrogens in the human body, alongside estradiol and estrone, but has the lowest potency among them.

Core Characteristics of Estriol

Low Potency: Its biological activity is significantly weaker than estradiol (the most potent estrogen). This means it typically has milder effects on tissues like the uterus, reducing certain risks associated with stronger estrogens.
Pregnancy Link: During pregnancy, estriol levels rise dramatically (often 1,000x higher than non-pregnant levels). For this reason, it was historically used to monitor fetal health and placental function.
Localized Action: It is often administered topically (e.g., creams, gels) in clinical settings, as this delivery method focuses its effects on specific tissues (like the vaginal lining) rather than causing widespread systemic changes.

Key Uses of Estriol

Menopausal Symptom Relief: It is commonly used to treat vaginal symptoms of menopause, such as dryness, itching, or pain during intercourse. Its low potency makes it a preferred option for women who cannot use stronger estrogens (e.g., those with a history of certain cancers).
Urinary Tract Health: It may help reduce the risk of recurrent urinary tract infections (UTIs) in postmenopausal women by improving the health of the urinary tract lining.
Research & Monitoring: In addition to its clinical uses, estriol levels (especially in urine or blood) were once a key marker in prenatal care to assess fetal well-being.

Important Note

Estriol is a prescription medication in most regions. Its use must be guided by a healthcare provider, who will evaluate factors like a patient’s medical history, symptoms, and potential risks (e.g., interactions with other drugs) before recommending it.