CompoundList
Sign in
Heterocyclic building blocks

Metopon

Also known as Methyldihydromorphinone, 5-Methyldihydromorphinone, Dihydro-6-methylmorphinone

CAS 143-52-2Formula C18H21NO3Molar mass 299.37 g/mol
Get quotes Safety data
Metopon chemical structure, C18H21NO3, CAS 143-52-2
2D chemical structure

Key facts

What buyers check first

All properties
CAS number
143-52-2
Formula
C18H21NO3
Molar mass
299.37 g/mol
HS code
293499
Category
Heterocyclic building blocks

What is Metopon?

Plain description, key identifiers and synonyms

Metopon is a morphinane alkaloid.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
(4R,4aR,7aR,12bS)-9-hydroxy-3,7a-dimethyl-2,4,4a,5,6,13-hexahydro-1H-4,12-methanobenzofuro[3,2-e]isoquinolin-7-one
CAS number
143-52-2 CAS number cross-checked
Molecular formula
C18H21NO3
UNII
94XZ1CC69D
InChIKey
NPZXCTIHHUUEEJ-CMKMFDCUSA-N
InChI
InChI=1S/C18H21NO3/c1-17-14(21)6-4-11-12-9-10-3-5-13(20)16(22-17)15(10)18(11,17)7-8-19(12)2/h3,5,11-12,20H,4,6-9H2,1-2H3/t11-,12+,17-,18-/m0/s1
Canonical SMILES
CN1CCC23c4c5ccc(O)c4OC2(C)C(=O)CCC3C1C5
Isomeric SMILES
C[C@]12C(=O)CC[C@@H]3[C@]14CCN([C@@H]3CC5=C4C(=C(C=C5)O)O2)C

Synonyms

  • Methyldihydromorphinone
  • 5-Methyldihydromorphinone
  • Dihydro-6-methylmorphinone
  • Morphinone, methyldihydro-
  • Metopone
  • Metoponum
  • 6-Methyldihydromorphinone
  • Morphinone, dihydro-6-methyl-
  • DEA No. 9260
  • Metopon (BAN)
  • 4,5-alpha-Epoxy-3-hydroxy-5,17-diethylmorphinan-6-one
  • (5alpha)-4,5-Epoxy-3-hydroxy-5,17-dimethylmorphinan-6-one
  • Morphinan-6-one, 4,5-epoxy-3-hydroxy-5,17-dimethyl-, (5alpha)-
  • Morphinan-6-one, 4,5-alpha-epoxy-3-hydroxy-5-beta-17-dimethyl-
  • (4R,4aR,7aR,12bS)-9-hydroxy-3,7a-dimethyl-2,4,4a,5,6,13-hexahydro-1H-4,12-methanobenzofuro[3,2-e]isoquinolin-7-one
  • 3-Hydroxy-5beta,17-dimethyl-4,5-epoxymorphinan-6-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
299.37 g/molcalc.
Exact mass
299.1521 Dacalc.
LogP (octanol/water)
2.02calc.
Topological polar surface area
49.77 Ųcalc.
Hydrogen bond donors
1calc.
Hydrogen bond acceptors
4calc.
Rotatable bonds
0calc.
Heavy atoms
22calc.
Rings
5calc.
Aromatic rings
1calc.
Fraction sp3 carbons
0.61calc.
Formal charge
0calc.
Stereocentres
4calc.
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=C1CCC2C3Cc4cccc5c4C2(CCN3)C1O5

O=C1CCC2C3Cc4cccc5c4C2(CCN3)C1O5

5 rings, 19 atoms.

148 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.

Metopon suppliers

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

No supplier listings yet

Post one free request and suppliers who make or trade Metopon can send you quotes. Your contact details stay private until you accept a quote.

Request quotesSell this chemical

Metopon 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

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 Metopon is traded under.

HS 2934.99Indicative HS code

Nucleic acids and their salts, other heterocyclic compounds, not elsewhere classified in heading 2934

World exports in 2024
$26.7B
+15.0% vs 2023, imports $26.3B
2019 to 2024
Top exporters
  1. Ireland26.3%
  2. China15.7%
  3. Singapore10.3%
Top importers
  1. United States24.5%
  2. Germany23.1%
  3. Japan4.5%
Reported customs values in USD, not prices.Full trade data

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

Frequently asked questions

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

What is Metopon?

Metopon is a morphinane alkaloid.

What is the CAS number of Metopon?

The CAS registry number of Metopon is 143-52-2.

What is the molecular formula and weight of Metopon?

The molecular formula of Metopon is C18H21NO3 and its molar mass is 299.37 g/mol.

What is Metopon used for?

Known uses and roles of Metopon include building blocks in research and laboratory and screening compounds in research and laboratory.

Is Metopon hazardous?

No GHS hazard classification for Metopon 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 Metopon?

Metopon is usually classified under HS code 293499 (Nucleic acids and their salts, whether or not chemically defined, other heterocyclic…). This is indicative, confirm it with your customs broker before shipping.

Where can I buy Metopon?

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

What is the price of Metopon?

Suppliers quote Metopon 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 Metopon

Get quotes for Metopon

Post one free request with your grade, quantity and destination. Matching suppliers send quotes you can compare side by side.
Post a request Sell Metopon
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 Metopon with a 3D view, its CAS number where known and a link back to this page. Free to use with the link kept.

<iframe src="https://www.compoundlist.com/embed/structure/metopon-143-52-2" title="Metopon 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 Heterocyclic building blocks or HS code 293499

Price on request
Free quotes, contact stays private
Get quotes