C18H24O2
272.4 g/mol
APIDanger
17alpha-Estradiol
CAS57-91-0EC200-354-8
Category
API
Compound Class
Steroid
Primary Use
Pharmaceutical Raw Material
17alpha-Estradiol is a stereoisomer of estradiol featuring hydroxy groups at positions 3 and 17, with the 17alpha configuration. It is recognized for its role as an estrogen and has been investigated as a geroprotector.
active pharmaceutical ingredient for research and pharmaceutical manufacturingestrogenic compound for laboratory studiesgeroprotector research compound
Content scope: Information here supports chemical identification and industrial supply, research, and manufacturing contexts. It is not a therapeutic claim, medical advice, or drug-use instructions.
Sourcing 17alpha-Estradiol?
Post a free purchase request — no account needed. It reaches suppliers of this product, and replies go straight to your inbox.
Related Compounds
ReferenceSame Category
Tricine
CAS5704-04-1
pharmaceutical raw material
ReferenceSame Category
Avatrombopag
CAS570406-98-3
pharmaceutical raw material
ReferenceSame Category
Desflurane
CAS57041-67-5
pharmaceutical raw material
ReferenceSame Category
6-Ketoestradiol
CAS571-92-6
pharmaceutical raw material
Referencestereoisomer of
17-Estradiol-16,16,17-D3
CAS79037-37-9
research compound
Referencestereoisomer of
17ALPHA-ESTRADIOL-2,4-D2
CAS81586-94-9
research compound
Referencestereoisomer of
17BETA-ESTRADIOL-16,16-D2
CAS3188-46-3
research compound
Referencestereoisomer of
Estradiol hemihydrate
CAS35380-71-3
pharmaceutical raw material
Safety Reference
Danger
H350May cause cancer
H351Suspected of causing cancer
H360May damage fertility or the unborn child
H361Suspected of damaging fertility or the unborn child
H362May cause harm to breast-fed children
H372Causes damage to organs through prolonged or repeated exposure
Customs Tariff Classification
The international HS code for 17alpha-Estradiol (CAS 57-91-0) is 2907.29.
HS code (international, 6-digit)
2907.29
EU CN code (8-digit)
2907 29 00
Classification per the EU customs inventory ECICS (2026-07 snapshot, HS 2022). National tariff lines and product form can affect the final classification.
Identifiers
IUPAC Name
(8R,9S,13S,14S,17R)-13-methyl-6,7,8,9,11,12,14,15,16,17-decahydrocyclopenta[a]phenanthrene-3,17-diol
InChIKey
VOXZDWNPVJITMN-SFFUCWETSA-N
SMILES
C[C@]12CC[C@H]3[C@H]([C@@H]1CC[C@H]2O)CCC4=C3C=CC(=C4)O
Synonyms (57)
- Alfatradiol (INN)
- Estradiol Hemihydrate EP Impurity B
- Ethinyl Estradiol EP Impurity L ; Estradiol Hemihydrate EP Impurity B; Ethinylestradiol EP Impurity L
- 1,3,5-Estratriene-3,17a-diol
- 17-Epiestradiol
- 17.alpha.-Oestradiol
- 17?-Estradiol
- 17a-Oestradiol
- 17a-estradiol
- 17alpha-E2
- 17alpha-Estradiol
- 3,17-Dihydroxyestratriene
- 3,3,5(10)-triene
- >>-Estradiol
- ALFATRADIOL [MART.]
- Alfatradiol
- Alfatradiol(Standard)
- Alpha-Estradiol (Standard)
- Alphaestradiol powder
- ESTRADIOL 17-ALPHA
- ESTRADIOL, ALPHA-
- Epiestradiol
- Epiestrol
- Ethinyl Estradiol Impurity L
- alfatradiolum
- alpha-Estradiol
- alpha-Estradiol, VETRANAL(TM)
Sourcing 17alpha-Estradiol?
Post a free purchase request — no account needed. It reaches suppliers of this product, and replies go straight to your inbox.