Estriol

16α -hydroxy- 17β - estradiol

• G03CA03
• G03CC06
• G03CD01

Colourless crystals

Estrogens

Fixed

282-285 ° C

Soluble in organic solvents and vegetable oils, practically insoluble in water

Risk

> 2000 mg · kg -1 ( LD50, rat, oral)

Template: Infobox chemical / molecular formula search available

Estriol (E3), and estriol, a metabolic product quantitatively important of estradiol and estrone. It has a weak estrogenic effect, approximately 1/10 that of estradiol. In the placenta is formed directly or synthesized from fetal precursors. Estriol is also produced in adipose tissue by aromatization of the A ring of androstenedione.