Estriol

Equipped with the best GMP factory of best quality estriol for cosmetic, health care and human nutritional products in China, it is able to supply you with top quality estriol USP/EP 99%, as well as the reactive intermediate of natural food supplements products.Product Description  The ovary produces a form named estradiol, which is converted into another important estrogen called estrone. Estriol is yet another form of estrogen metabolized from estradiol, weaker than the other two, but still active. Although estriol is most commonly linked to pregnancy since it is produced in the most measurable amounts at that time, it is still present throughout a woman's lifetime at varying levels and fluctuate throughout the day.CAS  NO.: 50-27-1Molecular Formula:C18H24O3Molecular Weight: 288.38Einecs: 200-022-2Melting Point: 281-282℃     Specification: USP34ItemSpec.CharacteristicsWhite or almost white crystalline powderIdentificationA:TLC B:UV spectrumC:IR spectrumSpecific optical rotation﹢60 °~﹢65°SolubilityPractically soluble in watersparingly soluble in ethanol(96 per cent)Melting pointabout 282℃Loss on drying≤0.5%Related substances Impurity A ≤ 0.5% Impurities B,C,D,E,F,G  ≤0.5%Sum of impurities other than A≤1.0%Disregard limit≤ 0.05%Non specific impurities≤ 0.05%Residual solventsMethanolAcetone ≤3000ppm≤5000ppmAssay97.0 ~ 103.0%ConclusionConform to USP34  Application Used in the treatment of leucopenia disease, also have certain curative effect to an enlarged prostate, prostate Packing
Estriol