CompoundList
Sign in
Impurities and reference standards

Epitestosterone

Also known as Isotestosterone, cis-Testosterone, 17-Epitestosterone

CAS 481-30-1Formula C19H28O2Molar mass 288.43 g/molEC 641-984-7
GHS signal word: Danger. Pictograms: Acute toxicity (severe), Harmful or irritant, Serious health hazard, Hazardous to the environment Controlled, licensed buyers only
Request as a licensed buyer Safety data
Epitestosterone chemical structure, C19H28O2, CAS 481-30-1
2D chemical structure

Key facts

What buyers check first

All properties
CAS number
481-30-1
Formula
C19H28O2
Molar mass
288.43 g/mol
EC number
641-984-7
HS code
293729
Category
Impurities and reference standards

What is Epitestosterone?

Plain description, key identifiers and synonyms

Epitestosterone is an androstanoid that is the C-17 epimer of testosterone. It has a role as an androgen antagonist and a human metabolite. It is a 17alpha-hydroxy steroid, a 3-oxo-Delta(4) steroid and an androstanoid.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
(8R,9S,10R,13S,14S,17R)-17-hydroxy-10,13-dimethyl-1,2,6,7,8,9,11,12,14,15,16,17-dodecahydrocyclopenta[a]phenanthren-3-one
CAS number
481-30-1 CAS number cross-checked
EC number
641-984-7
Molecular formula
C19H28O2
UNII
48L726977Z
MDL number
MFCD00067129
InChIKey
MUMGGOZAMZWBJJ-KZYORJDKSA-N
InChI
InChI=1S/C19H28O2/c1-18-9-7-13(20)11-12(18)3-4-14-15-5-6-17(21)19(15,2)10-8-16(14)18/h11,14-17,21H,3-10H2,1-2H3/t14-,15-,16-,17+,18-,19-/m0/s1
Canonical SMILES
CC12CCC(=O)C=C1CCC1C2CCC2(C)C(O)CCC12
Isomeric SMILES
C[C@]12CC[C@H]3[C@H]([C@@H]1CC[C@H]2O)CCC4=CC(=O)CC[C@]34C

Synonyms

  • Isotestosterone
  • cis-Testosterone
  • 17-Epitestosterone
  • 17alpha-Hydroxyandrost-4-en-3-one
  • 17-alpha-Testosterone
  • 17alpha-Testosterone
  • 17alpha-cis-Testosterone
  • 17-alpha-Hydroxyandrost-4-en-3-one
  • (17-alpha)-17-Hydroxyandrost-4-en-3-one
  • (8R,9S,10R,13S,14S,17R)-17-hydroxy-10,13-dimethyl-1,2,6,7,8,9,11,12,14,15,16,17-dodecahydrocyclopenta[a]phenanthren-3-one
  • Androst-4-en-3-one, 17-hydroxy-, (17alpha)-
  • 17 alpha Testosterone
  • (8R,9S,10R,13S,14S,17R)-17-hydroxy-10,13-dimethyl-1,2,6,7,8,9,11,12,14,15,16,17-dodecahydrocyclopenta(a)phenanthren-3-one
  • epi-Testosterone
  • 17-epi-Testosterone
  • Testosterone EP Impurity C
  • Testosterone, cis-
  • alpha epitestosterone
  • (17alpha)-17-hydroxyandrost-4-en-3-one
  • (10alpha,13alpha,14beta,17alpha)-17-Hydroxyandrost-4-En-3-One
  • (8R,9S,10R,13S,14S,17R)-17-hydroxy-10,13-dimethyl-6,7,8,9,10,11,12,13,14,15,16,17-dodecahydro-1H-cyclopenta[a]phenanthren-3(2H)-one
  • Androst-4-en-3-one, 17alpha-hydroxy-
  • 17alpha-Hydroxyandrost-4-en-3-one (Epitestosterone)
  • 4-Androsten-17alpha-ol-3-one
  • 17a-cis-Testosterone
Show all 31 synonyms
  • 17-Hydroxyandrost-4-en-3-one, (17alpha)-
  • ANDROST-4-EN-3-ONE, 17-alpha-HYDROXY-
  • Androst-4-en-3-one, 17-hydroxy-, (17-alpha)-
  • Androst-4-en-3-one, (17alpha)-
  • Epitestosterone 1.0 mg/ml in Acetonitrile
  • 4-Androstene-17alpha-ol-3-one

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
288.43 g/molcalc.
Exact mass
288.2089 Dacalc.
LogP (octanol/water)
3.88calc.
Topological polar surface area
37.3 Ųcalc.
Hydrogen bond donors
1calc.
Hydrogen bond acceptors
2calc.
Rotatable bonds
0calc.
Heavy atoms
21calc.
Rings
4calc.
Aromatic rings
0calc.
Fraction sp3 carbons
0.84calc.
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, O=C1C=C2CCC3C4CCCC4CCC3C2CC1

O=C1C=C2CCC3C4CCCC4CCC3C2CC1

4 rings, 18 atoms.

1,419 other chemicals share this scaffold

Safety and hazards

GHS classification summary, not a safety data sheet

GHS signal word
Danger
GHS06: Acute toxicity (severe)
Acute toxicity (severe)
GHS07: Harmful or irritant
Harmful or irritant
GHS08: Serious health hazard
Serious health hazard
GHS09: Hazardous to the environment
Hazardous to the environment

Hazard statements

  • H300Fatal if swallowed.
  • H301Toxic if swallowed.
  • H302Harmful if swallowed.
  • H341Suspected of causing genetic defects.
  • H351Suspected of causing cancer.
  • H360May damage fertility or the unborn child.
  • H361fdSuspected of damaging fertility. Suspected of damaging the unborn child.
  • H400Very toxic to aquatic life.
Precautionary statements (13)
  • P203Obtain, read and follow all safety instructions before use.
  • P264Wash skin thoroughly after handling.
  • P270Do not eat, drink or smoke when using this product.
  • P273Avoid release to the environment.
  • P280Wear protective gloves, protective clothing, eye protection and face protection.
  • P301 + P316If swallowed: Get emergency medical help immediately.
  • P301 + P317If swallowed: Get medical help.
  • P318If exposed or concerned, get medical advice.
  • P321Specific treatment (see supplemental first aid instructions on the label).
  • P330Rinse mouth.
  • P391Collect spillage.
  • P405Store locked up.
  • P501Dispose of contents and container in accordance with local regulations.

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

Full safety data and first aid

Epitestosterone suppliers

Controlled substance, listings of documented suppliers only, in the documented ranking

Controlled or monitored substance

Epitestosterone is controlled. Only documented suppliers can list it, and buyers must upload a valid licence with their request. Every request is reviewed before suppliers see it.

Our policy on controlled substances
No documented supplier lists it yet

Licensed buyers can post a request for Epitestosterone with their licence. Our compliance team reviews it before suppliers see it.

Request as a licensed buyer

Epitestosterone price

Indicative price range per kg from live supplier offers

No published prices right now

Suppliers quote this chemical on request. Send one free request and compare quotes side by side.

Get latest price

Uses and applications

What the substance is used for, by industry and function

Roles

  • androgen antagonist
  • animal metabolite
  • antagonist
  • eukaryotic metabolite
  • hormone antagonist
  • hormone receptor modulator
  • human metabolite
  • mammalian metabolite
  • metabolite
  • pharmaceutical
  • receptor modulator

Functional uses

  • Pharmaceutical

Regulatory status

Inventories, regulations and trade controls that list this substance

Controlled or monitored substance

Epitestosterone is controlled. Only documented suppliers can list it, and buyers must upload a valid licence with their request. Every request is reviewed before suppliers see it.

Our policy on controlled substances

HS code and trade data

Customs classification and reported world trade statistics

Global trade

World import and export statistics for the HS code Epitestosterone is traded under.

HS 2937.29Indicative HS code

Steroidal hormones, their derivatives and structural analogues, other

World exports in 2024
$2.32B
+5.7% vs 2023, imports $2.41B
2019 to 2024
Top exporters
  1. Belgium25.3%
  2. United States24.9%
  3. China13.0%
Top importers
  1. Italy18.0%
  2. Canada13.0%
  3. Belgium12.2%
Reported customs values in USD, not prices.Full trade data

The HS code shown for Epitestosterone is indicative (it is known at chapter level only). Confirm the classification with your customs broker before shipping.

Frequently asked questions

Quick answers about Epitestosterone, based on the data on this page

What is Epitestosterone?

Epitestosterone is an androstanoid that is the C-17 epimer of testosterone. It has a role as an androgen antagonist and a human metabolite. It is a 17alpha-hydroxy steroid, a 3-oxo-Delta(4) steroid and an androstanoid.

What is the CAS number of Epitestosterone?

The CAS registry number of Epitestosterone is 481-30-1.

What is the molecular formula and weight of Epitestosterone?

The molecular formula of Epitestosterone is C19H28O2 and its molar mass is 288.43 g/mol.

What is Epitestosterone used for?

Known uses and roles of Epitestosterone include hormones and steroids in pharmaceuticals, androgen antagonist, animal metabolite, antagonist, eukaryotic metabolite and 7 more.

Is Epitestosterone hazardous?

Epitestosterone carries the GHS signal word "Danger". Main hazards: fatal if swallowed, toxic if swallowed, harmful if swallowed. This summary is not an SDS, always read the supplier safety data sheet.

What is the HS code of Epitestosterone?

Epitestosterone is usually classified under HS code 293729 (Steroidal hormones, their derivatives and structural analogues, other). This is indicative, confirm it with your customs broker before shipping.

Can I buy Epitestosterone on CompoundList?

Epitestosterone is a controlled substance. Only documented suppliers can list it, and buyers must upload a valid licence with their request. Every request is reviewed by our compliance team before suppliers see it.

Guides for buyers

Practical guides that help when you source, ship or handle Epitestosterone

Request as a licensed buyer

Upload your licence with the request. Our compliance team reviews it before the documented suppliers see it.
Request as a licensed buyer
Data last updated 7 Oct 2026. Details may have changed, please confirm them with the supplier. Report an error on this page
Embed this structure on your websiteShow code

Paste this code into your page to show the 2D structure of Epitestosterone with a 3D view, its CAS number and a link back to this page. Free to use with the link kept.

<iframe src="https://www.compoundlist.com/embed/structure/epitestosterone-481-30-1" title="Epitestosterone structure on CompoundList" width="360" height="420" style="border:1px solid #E7E2DA;border-radius:12px;max-width:100%" loading="lazy" referrerpolicy="strict-origin-when-cross-origin"></iframe>
Preview the embed

Explore more in Impurities and reference standards or HS code 293729

Price on request
Free quotes, contact stays private
Licensed request