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Steroids and sterols

11alpha-Hydroxyestradiol

Also known as 11alpha-hydroxy-estradiol, 11I+/--Hydroxyestradiol, Estra-1,3,5(10)-triene-3,11,17-triol, (11alpha,17beta)-

CAS 1464-61-5Formula C18H24O3Molar mass 288.39 g/mol
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11alpha-Hydroxyestradiol chemical structure, C18H24O3, CAS 1464-61-5
2D chemical structure

Key facts

What buyers check first

All properties
CAS number
1464-61-5
Formula
C18H24O3
Molar mass
288.39 g/mol
HS code
290729
Category
Steroids and sterols

What is 11alpha-Hydroxyestradiol?

Plain description, key identifiers and synonyms

11alpha-Hydroxyestradiol is a chemical substance with the molecular formula C18H24O3 and a molar mass of 288.39 g/mol. Its CAS registry number is 1464-61-5. The IUPAC name is (8S,9S,11R,13S,14S,17S)-13-methyl-6,7,8,9,11,12,14,15,16,17-decahydrocyclopenta[a]phenanthrene-3,11,17-triol.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
(8S,9S,11R,13S,14S,17S)-13-methyl-6,7,8,9,11,12,14,15,16,17-decahydrocyclopenta[a]phenanthrene-3,11,17-triol
CAS number
1464-61-5
Molecular formula
C18H24O3
InChIKey
IGPOPFXCSGWCLM-SOMFZHDCSA-N
InChI
InChI=1S/C18H24O3/c1-18-9-15(20)17-12-5-3-11(19)8-10(12)2-4-13(17)14(18)6-7-16(18)21/h3,5,8,13-17,19-21H,2,4,6-7,9H2,1H3/t13-,14-,15+,16-,17+,18-/m0/s1
Canonical SMILES
CC12CC(O)C3c4ccc(O)cc4CCC3C1CCC2O
Isomeric SMILES
C[C@]12C[C@H]([C@H]3[C@H]([C@@H]1CC[C@@H]2O)CCC4=C3C=CC(=C4)O)O

Synonyms

  • 11alpha-hydroxy-estradiol
  • 11I+/--Hydroxyestradiol
  • Estra-1,3,5(10)-triene-3,11,17-triol, (11alpha,17beta)-
  • (8S,9S,11R,13S,14S,17S)-13-methyl-6,7,8,9,11,12,14,15,16,17-decahydrocyclopenta[a]phenanthrene-3,11,17-triol
  • Estra-1,3,5(10)-triene-3,11,17-triol #
  • Estra-1(10),2,4-triene-3,11alpha,17beta-triol

Physical and chemical properties

Measured values and descriptors computed from the structure

Physical and chemical properties

Measured values, check the supplier specification for your grade

No measured properties are recorded for this substance yet. Ask suppliers for a technical data sheet.

Values vary by grade. Ask suppliers for the COA or TDS of the batch you buy.

Computed descriptors

Calculated from the structure, useful for screening and formulation

Molecular weight
288.39 g/molcalc.
Exact mass
288.1725 Dacalc.
LogP (octanol/water)
2.58calc.
Topological polar surface area
60.69 Ųcalc.
Hydrogen bond donors
3calc.
Hydrogen bond acceptors
3calc.
Rotatable bonds
0calc.
Heavy atoms
21calc.
Rings
4calc.
Aromatic rings
1calc.
Fraction sp3 carbons
0.67calc.
Formal charge
0calc.
Stereocentres
6calc.
Lipinski rule of five
Passes (0 violations)calc.

Calculated for screening. Confirm critical figures with the supplier.

Murcko scaffold

The ring system that remains when every side chain is removed

Murcko scaffold of this chemical, c1ccc2c(c1)CCC1C2CCC2CCCC21

c1ccc2c(c1)CCC1C2CCC2CCCC21

4 rings, 17 atoms.

585 other chemicals share this scaffold

Safety and hazards

GHS classification summary, not a safety data sheet

No GHS hazard classification is recorded for this substance yet. That does not mean it is harmless.

GHS classification summary, not a safety data sheet (SDS). Classifications can differ by supplier, grade and concentration. Always check the supplier's SDS.

11alpha-Hydroxyestradiol suppliers

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11alpha-Hydroxyestradiol price

Indicative price range per kg from live supplier offers

No published prices right now

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Uses and applications

What the substance is used for, by industry and function

Applications are not documented for this substance yet. Suppliers often describe uses on their product pages, linked in the suppliers list above.

Regulatory status

Inventories, regulations and trade controls that list this substance

No regulatory list memberships are recorded for this substance yet. Always check the rules of the importing and exporting country before trade.

HS code and trade data

Customs classification and reported world trade statistics

Global trade

World import and export statistics for the HS code 11alpha-Hydroxyestradiol is traded under.

HS 2907.29Indicative HS code

Polyphenols, phenol-alcohols, other

World exports in 2024
$535M
−27.0% vs 2023, imports $565M
2019 to 2024
Top exporters
  1. India * partner reported17.7%
  2. Germany16.5%
  3. Japan15.8%
Top importers
  1. United States13.1%
  2. Japan8.0%
  3. Belgium7.9%

* Partner reported figures, a lower bound.

Reported customs values in USD, not prices.Full trade data

The HS code shown for 11alpha-Hydroxyestradiol is indicative (it was assigned by structure rules). Confirm the classification with your customs broker before shipping.

Frequently asked questions

Quick answers about 11alpha-Hydroxyestradiol, based on the data on this page

What is 11alpha-Hydroxyestradiol?

11alpha-Hydroxyestradiol is a chemical substance with the molecular formula C18H24O3 and a molar mass of 288.39 g/mol. Its CAS registry number is 1464-61-5. The IUPAC name is (8S,9S,11R,13S,14S,17S)-13-methyl-6,7,8,9,11,12,14,15,16,17-decahydrocyclopenta[a]phenanthrene-3,11,17-triol.

What is the CAS number of 11alpha-Hydroxyestradiol?

The CAS registry number of 11alpha-Hydroxyestradiol is 1464-61-5.

What is the molecular formula and weight of 11alpha-Hydroxyestradiol?

The molecular formula of 11alpha-Hydroxyestradiol is C18H24O3 and its molar mass is 288.39 g/mol.

Is 11alpha-Hydroxyestradiol hazardous?

No GHS hazard classification for 11alpha-Hydroxyestradiol is recorded on CompoundList yet. That does not prove it is safe. Always read the supplier safety data sheet.

What is the HS code of 11alpha-Hydroxyestradiol?

11alpha-Hydroxyestradiol is usually classified under HS code 290729 (Polyphenols, phenol-alcohols, other). This is indicative, confirm it with your customs broker before shipping.

Where can I buy 11alpha-Hydroxyestradiol?

Post a free request on CompoundList and suppliers of 11alpha-Hydroxyestradiol will send you quotes. Your contact details stay private until you accept a quote.

What is the price of 11alpha-Hydroxyestradiol?

Suppliers quote 11alpha-Hydroxyestradiol on request because prices depend on grade, purity, quantity and destination. A free request on CompoundList gets you several quotes to compare.

Guides for buyers

Practical guides that help when you source, ship or handle 11alpha-Hydroxyestradiol

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Data last updated 7 Oct 2026. Details may have changed, please confirm them with the supplier. Report an error on this page
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