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Oncology and immunology drugs

Testolactone

Also known as Teslac, Teolit, Fludestrin

CAS 968-93-4Formula C19H24O3Molar mass 300.40 g/molEC 213-534-6
GHS signal word: Danger. Pictograms: Harmful or irritant, Serious health hazard 2 suppliers listed
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Testolactone chemical structure, C19H24O3, CAS 968-93-4
2D chemical structure

Key facts

What buyers check first

All properties
Appearance
Crystals from acetone
Melting point
218 to 219
Solubility
SLIGHTLY SOL IN WATER & BENZYL ALCOHOL, SOL IN ALC & CHLOROFORM, INSOL IN ETHER & SOLVEN…
HS code
293220
Category
Oncology and immunology drugs
Illustrative photo, 25 kg white woven sacks of powder on a pallet in a warehouse
Typical packagingIllustrative packaging image, not the actual product

What is Testolactone?

Plain description, key identifiers and synonyms

Testolactone is a seco-androstane and a 3-oxo-Delta(1),Delta(4)-steroid.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
(4aS,4bR,10aR,10bS,12aS)-10a,12a-dimethyl-4,4a,4b,5,6,10b,11,12-octahydro-3H-naphtho[2,1-f]chromene-2,8-dione
CAS number
968-93-4 CAS number cross-checked
EC number
213-534-6
Molecular formula
C19H24O3
UNII
6J9BLA949Q
InChIKey
BPEWUONYVDABNZ-DZBHQSCQSA-N
InChI
InChI=1S/C19H24O3/c1-18-9-7-13(20)11-12(18)3-4-14-15(18)8-10-19(2)16(14)5-6-17(21)22-19/h7,9,11,14-16H,3-6,8,10H2,1-2H3/t14-,15+,16+,18+,19+/m1/s1
Canonical SMILES
CC12CCC3C(CCC4=CC(=O)C=CC43C)C1CCC(=O)O2
Isomeric SMILES
C[C@]12CC[C@H]3[C@H]([C@@H]1CCC(=O)O2)CCC4=CC(=O)C=C[C@]34C

Synonyms

  • Teslac
  • Teolit
  • Fludestrin
  • Testolacton
  • 1-Dehydrotestololactone
  • 1,2-Didehydrotestololactone
  • delta(1)-Testololactone
  • Testolactona
  • Testolactonum
  • Testolattone
  • SQ 9538
  • D-Homo-17A-oxaandrosta-1,4-diene-3,17-dione
  • Testololactone, 1-dehydro-
  • delta(1)-Dehydrotestolactone
  • Testolactone ciii
  • 13-Hydroxy-3-oxo-13,17-secoandrosta-1,4-dien-17-oic acid delta-lactone
  • Delta-1-testololactone
  • Testololactone, 1,2-didehydro-
  • 17alpha-Oxo-D-homo-1,4-androstadiene-3,17-dione
  • 3-oxo-13,17-secoandrosta-1,4-dieno-17,13alpha-lactone
  • (4aS,4bR,10aR,10bS,12aS)-10a,12a-dimethyl-3,4,4a,5,6,10a,10b,11,12,12a-decahydro-2H-naphtho[2,1-f]chromene-2,8(4bH)-dione
  • (4aS,4bR,10aR,10bS,12aS)-10a,12a-dimethyl-4,4a,4b,5,6,10b,11,12-octahydro-3H-naphtho[2,1-f]chromene-2,8-dione
  • 1,2,3,4,4a,4b,7,9,10,10a-Decahydro-2-hydroxy-2,4b-dimethyl-7-oxo-1-phenanthrenepropionic acid delta-lactone
  • 13,17-Secoandrosta-1,4-dien-17-oic acid, 13-hydroxy-3-oxo-, delta-lactone
  • delta(1)-Testolactone
Show all 34 synonyms
  • 1 Dehydrotestolactone
  • 1-Dehydrotestolactone
  • (4aS,4bR,10aR,10bS,12aS)-10a,12a-dimethyl-3,4,4a,5,6,10a,10b,11,12,12a-decahydro-2H-naphtho(2,1-f)chromene-2,8(4bH)-dione
  • (4aS,4bR,10aR,10bS,12aS)-10a,12a-dimethyl-4,4a,4b,5,6,10b,11,12-octahydro-3H-naphtho(2,1-f)chromene-2,8-dione
  • therapeutic testolactone
  • 13-Hydroxy-3-0x0-13,17-secoandrosta-1,4-dien-17-oic Acid Delta-Lactone
  • Teslak
  • 1,2-Dehydrotestololactone
  • delta1-Testololactone

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

Appearance
Crystals from acetoneexp.
Odour
PRACTICALLY ODORLESSexp.
Melting point
218 to 219exp.
Solubility
SLIGHTLY SOL IN WATER & BENZYL ALCOHOL, SOL IN ALC & CHLOROFORM, INSOL IN ETHER & SOLVENT HEXANEexp.

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
300.40 g/molcalc.
Exact mass
300.1725 Dacalc.
LogP (octanol/water)
3.59calc.
Topological polar surface area
43.37 Ųcalc.
Hydrogen bond donors
0calc.
Hydrogen bond acceptors
3calc.
Rotatable bonds
0calc.
Heavy atoms
22calc.
Rings
4calc.
Aromatic rings
0calc.
Fraction sp3 carbons
0.68calc.
Formal charge
0calc.
Stereocentres
5calc.
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=CC2C(=C1)CCC1C3CCC(=O)OC3CCC21

O=C1C=CC2C(=C1)CCC1C3CCC(=O)OC3CCC21

4 rings, 20 atoms.

4 other chemicals share this scaffold

Safety and hazards

GHS classification summary, not a safety data sheet

GHS signal word
Danger
GHS07: Harmful or irritant
Harmful or irritant
GHS08: Serious health hazard
Serious health hazard

Hazard statements

  • H302Harmful if swallowed.
  • H360DMay damage the unborn child.
Precautionary statements (9)
  • P203Obtain, read and follow all safety instructions before use.
  • P264Wash skin thoroughly after handling.
  • P270Do not eat, drink or smoke when using this product.
  • P280Wear protective gloves, protective clothing, eye protection and face protection.
  • P301 + P317If swallowed: Get medical help.
  • P318If exposed or concerned, get medical advice.
  • P330Rinse mouth.
  • 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

Testolactone suppliers

Sponsored listings first, then the documented ranking: membership, verification, replies, completeness, freshness and ratings

All 2 suppliers

Suppliers marked Unclaimed profile have not claimed their profile yet. They are not verified by CompoundList, their offers are price on request and details may have changed, so please confirm them with the supplier. Company representatives can claim a profile with a business email on the company's own website domain. Our team verifies each claim and sends the result by email.

Where suppliers are based

2 suppliers in 1 country

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Testolactone 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.

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Uses and applications

What the substance is used for, by industry and function

Use classes: Pharmaceuticals.

Industries and functions

Pharmacological actions

  • Antineoplastic Agents, Hormonal

Functional uses

  • Pharmaceutical

Pharmacology

Testolactone is an Aromatase Inhibitor. The mechanism of action of testolactone is as an Aromatase Inhibitor.

How it is made

Obtained by microbial transformation of progesterone, Reichstein's substance S, or testosterone.

Fried et al, US 2744120 (1956 to Olin Mathieson)

Regulatory status

Inventories, regulations and trade controls that list this substance

Controls

  • US DEA controlled substance or listed chemical

HS code and trade data

Customs classification and reported world trade statistics

Global trade

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

HS 2932.20Indicative HS code

Lactones

World exports in 2024
$1.97B
−4.7% vs 2023, imports $2.07B
2019 to 2024
Top exporters
  1. China56.3%
  2. India * partner reported7.4%
  3. Germany7.3%
Top importers
  1. United States14.2%
  2. India * partner reported13.5%
  3. Brazil8.5%

* Partner reported figures, a lower bound.

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

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

Frequently asked questions

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

What is Testolactone?

Testolactone is a seco-androstane and a 3-oxo-Delta(1),Delta(4)-steroid.

What is the CAS number of Testolactone?

The CAS registry number of Testolactone is 968-93-4.

What is the molecular formula and weight of Testolactone?

The molecular formula of Testolactone is C19H24O3 and its molar mass is 300.40 g/mol.

What is Testolactone used for?

Use classes: Pharmaceuticals.

Is Testolactone hazardous?

Testolactone carries the GHS signal word "Danger". Main hazards: harmful if swallowed, may damage the unborn child. This summary is not an SDS, always read the supplier safety data sheet.

What is the HS code of Testolactone?

Testolactone is usually classified under HS code 293220 (Lactones). This is indicative, confirm it with your customs broker before shipping.

Where can I buy Testolactone?

CompoundList lists 2 suppliers of Testolactone in China. Send one free request to get and compare quotes. Your contact details stay private until you accept a quote.

What is the price of Testolactone?

Suppliers quote Testolactone 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 Testolactone

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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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