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Impurities and reference standards

Trendione

Also known as Estra-4,9,11-triene-3,17-dione, (8S,13S,14S)-13-methyl-1,2,6,7,8,14,15,16-octahydrocyclopenta[a]phenanthrene-3,17-dione, Altrenogest impurity 10

CAS 4642-95-9Formula C18H20O2Molar mass 268.36 g/mol
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Trendione chemical structure, C18H20O2, CAS 4642-95-9
2D chemical structure

Key facts

What buyers check first

All properties
CAS number
4642-95-9
Formula
C18H20O2
Molar mass
268.36 g/mol
HS code
291429
Category
Impurities and reference standards

What is Trendione?

Plain description, key identifiers and synonyms

estra-4,9,11-triene-3,17-dione is a DEA Schedule III controlled substance. Substances in the DEA Schedule III have a potential for abuse less than substances in Schedules I or II and abuse may lead to moderate or low physical dependence or high psychological dependence. It is a Anabolic steroids substance.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
(8S,13S,14S)-13-methyl-1,2,6,7,8,14,15,16-octahydrocyclopenta[a]phenanthrene-3,17-dione
CAS number
4642-95-9 CAS number cross-checked
Molecular formula
C18H20O2
UNII
7M9J4CV848
InChIKey
KBSXJBBFQODDTQ-RYRKJORJSA-N
InChI
InChI=1S/C18H20O2/c1-18-9-8-14-13-5-3-12(19)10-11(13)2-4-15(14)16(18)6-7-17(18)20/h8-10,15-16H,2-7H2,1H3/t15-,16+,18+/m1/s1
Canonical SMILES
CC12C=CC3=C4CCC(=O)C=C4CCC3C1CCC2=O
Isomeric SMILES
C[C@]12C=CC3=C4CCC(=O)C=C4CC[C@H]3[C@@H]1CCC2=O

Synonyms

  • Estra-4,9,11-triene-3,17-dione
  • (8S,13S,14S)-13-methyl-1,2,6,7,8,14,15,16-octahydrocyclopenta[a]phenanthrene-3,17-dione
  • Altrenogest impurity 10
  • (8S,13S,14S)-13-Methyl-1,2,6,7,8,14,15,16-octahydrocyclopenta(a)phenanthrene-3,17-dione
  • Trenavar
  • RU 2065
  • Equilin Impurity 3, Trendione
  • Estra-4,9,11-triene-3,17-dione, (8S,13S,14S)-13-methyl-1,6,7,8,13,14,15,16-octahydro-3H-cyclopenta[a]phenanthrene-3,17(2H)-dione

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
268.36 g/molcalc.
Exact mass
268.1463 Dacalc.
LogP (octanol/water)
3.54calc.
Topological polar surface area
34.14 Ųcalc.
Hydrogen bond donors
0calc.
Hydrogen bond acceptors
2calc.
Rotatable bonds
0calc.
Heavy atoms
20calc.
Rings
4calc.
Aromatic rings
0calc.
Fraction sp3 carbons
0.56calc.
Formal charge
0calc.
Stereocentres
3calc.
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=C2CCC3C(=C2CC1)C=CC1C(=O)CCC13

O=C1C=C2CCC3C(=C2CC1)C=CC1C(=O)CCC13

4 rings, 19 atoms.

1 other chemical 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.

Trendione suppliers

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Trendione price

Indicative price range per kg from live supplier offers

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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

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 Trendione is traded under.

HS 2914.29Indicative HS code

Cyclanic, cyclenic or cycloterpenic ketones without other oxygen function, other

World exports in 2024
$1B
+6.6% vs 2023, imports $980M
2019 to 2024
Top exporters
  1. China32.5%
  2. India * partner reported12.9%
  3. Germany12.3%
Top importers
  1. United States15.7%
  2. Japan8.7%
  3. Germany8.7%

* Partner reported figures, a lower bound.

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

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

Frequently asked questions

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

What is Trendione?

estra-4,9,11-triene-3,17-dione is a DEA Schedule III controlled substance. Substances in the DEA Schedule III have a potential for abuse less than substances in Schedules I or II and abuse may lead to moderate or low physical dependence or high psychological dependence. It is a Anabolic steroids substance.

What is the CAS number of Trendione?

The CAS registry number of Trendione is 4642-95-9.

What is the molecular formula and weight of Trendione?

The molecular formula of Trendione is C18H20O2 and its molar mass is 268.36 g/mol.

Is Trendione hazardous?

No GHS hazard classification for Trendione 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 Trendione?

Trendione is usually classified under HS code 291429 (Cyclanic, cyclenic or cycloterpenic ketones without other oxygen function, other). This is indicative, confirm it with your customs broker before shipping.

Where can I buy Trendione?

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What is the price of Trendione?

Suppliers quote Trendione 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 Trendione

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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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