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Impurities and reference standards

Finasteride impurity

Also known as Finasteride Impurity 19, (1S,3aS,3bS,9aR,9bS,11aS)-N-tert-butyl-9a,11a-dimethyl-7-oxo-1,2,3,3a,3b,4,6,8,9,9b,10,11-dodecahydroindeno[5,4-f]quinoline-1-carboxamide, (4aR,4bS,6aS,7S,9aS,9bS)-N-(1,1-Dimethylethyl)-2,3,4,4a,4b,5,6,6a,7,8,9,9a,9b,10-tetradecahydro-4a,6a-dimethyl-2-oxo-1H-indeno[5,4-f]quinoline-7-carboxamide

CAS 166896-74-8Formula C23H36N2O2Molar mass 372.55 g/mol
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Finasteride impurity chemical structure, C23H36N2O2, CAS 166896-74-8
2D chemical structure

Key facts

What buyers check first

All properties
CAS number
166896-74-8
Formula
C23H36N2O2
Molar mass
372.55 g/mol
HS code
293379
Category
Impurities and reference standards

What is Finasteride impurity?

Plain description, key identifiers and synonyms

Finasteride impurity is a chemical substance with the molecular formula C23H36N2O2 and a molar mass of 372.55 g/mol. Its CAS registry number is 166896-74-8. The IUPAC name is (1S,3aS,3bS,9aR,9bS,11aS)-N-tert-butyl-9a,11a-dimethyl-7-oxo-1,2,3,3a,3b,4,6,8,9,9b,10,11-dodecahydroindeno[5,4-f]quinoline-1-carboxamide.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
(1S,3aS,3bS,9aR,9bS,11aS)-N-tert-butyl-9a,11a-dimethyl-7-oxo-1,2,3,3a,3b,4,6,8,9,9b,10,11-dodecahydroindeno[5,4-f]quinoline-1-carboxamide
CAS number
166896-74-8
Molecular formula
C23H36N2O2
InChIKey
IHYQEUFHHYXVFL-FIIPNDBVSA-N
InChI
InChI=1S/C23H36N2O2/c1-21(2,3)25-20(27)17-8-7-15-14-6-9-18-23(5,13-11-19(26)24-18)16(14)10-12-22(15,17)4/h9,14-17H,6-8,10-13H2,1-5H3,(H,24,26)(H,25,27)/t14-,15-,16-,17+,22-,23+/m0/s1
Canonical SMILES
CC(C)(C)NC(=O)C1CCC2C3CC=C4NC(=O)CCC4(C)C3CCC12C
Isomeric SMILES
C[C@]12CC[C@H]3[C@H]([C@@H]1CC[C@@H]2C(=O)NC(C)(C)C)CC=C4[C@@]3(CCC(=O)N4)C

Synonyms

  • Finasteride Impurity 19
  • (1S,3aS,3bS,9aR,9bS,11aS)-N-tert-butyl-9a,11a-dimethyl-7-oxo-1,2,3,3a,3b,4,6,8,9,9b,10,11-dodecahydroindeno[5,4-f]quinoline-1-carboxamide
  • (4aR,4bS,6aS,7S,9aS,9bS)-N-(1,1-Dimethylethyl)-2,3,4,4a,4b,5,6,6a,7,8,9,9a,9b,10-tetradecahydro-4a,6a-dimethyl-2-oxo-1H-indeno[5,4-f]quinoline-7-carboxamide
  • 17|A-(t-Butylcarbamoyl)-4-aza-5|A-androsten-3-one
  • 4-Azaandrost-5-ene-17-carboxamide, N-(1,1-dimethylethyl)-3-oxo-, (17)-
  • (4aR,4bS,6aS,7S,9aS,9bS)-N-(tert-butyl)-4a,6a-dimethyl-2-oxo-2,3,4,4a,4b,5,6,6a,7,8,9,9a,9b,10-tetradecahydro-1H-indeno[5,4-f]quinoline-7-carboxamide
  • 1H-Indeno[5,4-f]quinoline-7-carboxamide, N-(1,1-dimethylethyl)-2,3,4,4a,4b,5,6,6a,7,8,9,9a,9b,10-tetradecahydro-4a,6a-dimethyl-2-oxo-, (4aR,4bS,6aS,7S,9aS,9bS)-

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
372.55 g/molcalc.
Exact mass
372.2777 Dacalc.
LogP (octanol/water)
4.16calc.
Topological polar surface area
58.2 Ųcalc.
Hydrogen bond donors
2calc.
Hydrogen bond acceptors
2calc.
Rotatable bonds
1calc.
Heavy atoms
27calc.
Rings
4calc.
Aromatic rings
0calc.
Fraction sp3 carbons
0.83calc.
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=C1CCC2C(=CCC3C4CCCC4CCC23)N1

O=C1CCC2C(=CCC3C4CCCC4CCC23)N1

4 rings, 18 atoms.

14 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.

Finasteride impurity suppliers

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All 3 suppliers

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Where suppliers are based

3 suppliers in 2 countries

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Finasteride impurity 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

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 Finasteride impurity is traded under.

HS 2933.79Indicative HS code

Lactams, other lactams

World exports in 2024
$16.2B
−64.4% vs 2023, imports $15.4B
2019 to 2024
Top exporters
  1. Ireland37.0%
  2. France * partner reported15.6%
  3. Spain11.3%
Top importers
  1. Germany27.8%
  2. Ireland18.9%
  3. Panama * partner reported12.9%

* Partner reported figures, a lower bound.

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

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

Frequently asked questions

Quick answers about Finasteride impurity, based on the data on this page

What is Finasteride impurity?

Finasteride impurity is a chemical substance with the molecular formula C23H36N2O2 and a molar mass of 372.55 g/mol. Its CAS registry number is 166896-74-8. The IUPAC name is (1S,3aS,3bS,9aR,9bS,11aS)-N-tert-butyl-9a,11a-dimethyl-7-oxo-1,2,3,3a,3b,4,6,8,9,9b,10,11-dodecahydroindeno[5,4-f]quinoline-1-carboxamide.

What is the CAS number of Finasteride impurity?

The CAS registry number of Finasteride impurity is 166896-74-8.

What is the molecular formula and weight of Finasteride impurity?

The molecular formula of Finasteride impurity is C23H36N2O2 and its molar mass is 372.55 g/mol.

Is Finasteride impurity hazardous?

No GHS hazard classification for Finasteride impurity 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 Finasteride impurity?

Finasteride impurity is usually classified under HS code 293379 (Lactams, other lactams). This is indicative, confirm it with your customs broker before shipping.

Where can I buy Finasteride impurity?

CompoundList lists 3 suppliers of Finasteride impurity in India and China. Send one free request to get and compare quotes. Your contact details stay private until you accept a quote.

Where can I buy Finasteride impurity in India?

2 suppliers in India list Finasteride impurity on CompoundList. Filter the suppliers list by country and send a request to compare prices, grades and delivery times.

What is the price of Finasteride impurity?

Suppliers quote Finasteride impurity on request because prices depend on grade, purity, quantity and destination. A free request on CompoundList gets you several quotes to compare.

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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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