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Empirical Formula (Hill Notation):
CAS Number:
Molecular Weight:
MDL number:
PubChem Substance ID:

storage temp.


SMILES string




InChI key


Gene Information

human ... ESR1(2099)
rat ... Ar(24208)

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Biochem/physiol Actions

4-Hydroxyestradiol, an metabolite of estradiol, forms adducts with adenine (N3) and guanine (N7) by depurinating sites in DNA of cultured human breast epithelial cells. This effect may play an important role in malignant transformation of these cells.


Health hazard

Signal Word


Hazard Statements

Hazard Classifications

Carc. 2

Storage Class Code

11 - Combustible Solids



Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

Certificates of Analysis (COA)

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Mary Ann Rempel et al.
The Science of the total environment, 407(7), 2209-2215 (2009-01-28)
Oxidative compounds have been demonstrated to decrease the fertilization capability and viability of offspring of treated spermatozoa. As estrogen and its hydroxylated metabolites readily undergo redox cycling, this study was undertaken to determine if estrogens and other oxidants could damage
Philip S Crooke et al.
Cancer epidemiology, biomarkers & prevention : a publication of the American Association for Cancer Research, cosponsored by the American Society of Preventive Oncology, 20(7), 1502-1515 (2011-05-26)
Current models of breast cancer risk prediction do not directly reflect mammary estrogen metabolism or genetic variability in exposure to carcinogenic estrogen metabolites. We developed a model that simulates the kinetic effect of genetic variants of the enzymes CYP1A1, CYP1B1
H Ka et al.
Endocrinology, 142(6), 2303-2310 (2001-05-18)
Keratinocyte growth factor (KGF) is expressed by uterine endometrial epithelial cells during the estrous cycle and during pregnancy in pigs, whereas KGF receptor is expressed in conceptus trophectoderm and endometrial epithelia. In particular, KGF expression in the endometrium is highest
Muhammad Zahid et al.
Free radical biology & medicine, 49(3), 392-400 (2010-05-18)
Catechol estrogens, especially 4-hydroxylated metabolites of 17beta-estradiol (E(2)), are responsible for estrogen-induced carcinogenesis. 4-Hydroxyestradiol (4-OHE(2)), a major metabolite of E(2) formed preferentially by cytochrome P-450 1B1, is oxidized to E(2)-3,4-quinone, which can react with DNA to yield the depurinating adducts
Richard Santen et al.
Annals of the New York Academy of Sciences, 1155, 132-140 (2009-03-03)
Long-term exposure to estrogens influences the development of breast cancer in women, but the precise mechanisms involved are not clearly defined. Our working hypothesis is that estrogen modulates this process by two separate processes. One involves the binding of estradiol

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