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Analgesics and anti-inflammatories

Pentazocine

Also known as Pentazocin, Fortalgesic, Fortalin

CAS 359-83-1Formula C19H27NOMolar mass 285.43 g/molEC 206-634-6
GHS signal word: Warning. Pictograms: Harmful or irritant Prohibited, not for trade
Why it is not for trade
Pentazocine chemical structure, C19H27NO, CAS 359-83-1
2D chemical structure

Key facts

What buyers check first

All properties
Appearance
White to very pale tan crystalline powder
Melting point
145.4 to 147.2
Solubility
White to pale cream colored, odorless crystalline powder, there are two forms melting at…
HS code
293333
Category
Analgesics and anti-inflammatories

What is Pentazocine?

Plain description, key identifiers and synonyms

Pentazocine is a benzazocine.

Pentazocine is an opioid medication.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
(1R,9R,13R)-1,13-dimethyl-10-(3-methylbut-2-enyl)-10-azatricyclo[7.3.1.02,7]trideca-2(7),3,5-trien-4-ol
CAS number
359-83-1 CAS number cross-checkedOther or deprecated CAS: 7488-49-5
EC numbers
206-634-6, 244-593-6, 811-426-9
Molecular formula
C19H27NO
UNII
768DQ5A5AI, RP4A60D26L
InChIKey
VOKSWYLNZZRQPF-GDIGMMSISA-N
InChI
InChI=1S/C19H27NO/c1-13(2)7-9-20-10-8-19(4)14(3)18(20)11-15-5-6-16(21)12-17(15)19/h5-7,12,14,18,21H,8-11H2,1-4H3/t14-,18+,19+/m0/s1
Canonical SMILES
CC(C)=CCN1CCC2(C)c3cc(O)ccc3CC1C2C
Isomeric SMILES
C[C@H]1[C@H]2CC3=C([C@@]1(CCN2CC=C(C)C)C)C=C(C=C3)O

Synonyms

  • Pentazocin
  • Fortalgesic
  • Fortalin
  • Pentazocinum
  • Pentagin
  • Sosigon
  • Pentazocina
  • Liticon
  • Fortral
  • Pentazocine civ
  • 2-(3,3-Dimethylallyl)cyclazocine
  • NIH 7958
  • WIN 20228
  • WIN 20,228
  • 2-Dimethylallyl-5,9-dimethyl-2'-hydroxybenzomorphan
  • (2R*,6R*,11R*)-1,2,3,4,5,6-Hexahydro-6,11-dimethyl-3-(3-methyl-2-butenyl)-2,6-methano-3-benzazocin-8-ol
  • 2'-Hydroxy-5,9-dimethyl-2-(3,3-dimethylallyl)-6,7-benzomorphan
  • 2-(3,3-Dimethylallyl)-2',2'-hydroxy-5,9-dimethyl-6,7-benzomorphan
  • 1,2,3,4,5,6-Hexahydro-6,11-dimethyl-3-(3-methyl-2-butenyl)-2,6-methano-3-benzazocin-8-ol
  • 3-(3-Methyl-2-butenyl)-1,2,3,4,5,6-hexahydro-6,11-dimethyl-2,6-methano-3-benzazocin-8-ol
  • 2,6-Methano-3-benzazocin-8-ol, 1,2,3,4,5,6-hexahydro-6,11-dimethyl-3-(3-methyl-2-butenyl)-
  • 2,6-Methano-3-benzazocin-8-ol, 1,2,3,4,5,6-hexahydro-6,11-dimethyl-3-(3-methyl-2-butenyl)-, (2alpha,6alpha,11R*)-
  • (1R,9R,13R)-1,13-dimethyl-10-(3-methylbut-2-en-1-yl)-10-azatricyclo(7.3.1.0^(2,7))trideca-2,4,6-trien-4-ol
  • (1R,9R,13R)-1,13-dimethyl-10-(3-methylbut-2-en-1-yl)-10-azatricyclo[7.3.1.0^{2,7}]trideca-2,4,6-trien-4-ol
  • Lactate, Pentazocine
Show all 37 synonyms
  • (1R,9R,13R)-1,13-dimethyl-10-(3-methylbut-2-en-1-yl)-10-azatricyclo(7.3.1.02,7)trideca-2,4,6-trien-4-ol
  • L-pentazocine
  • Levopentazocine
  • Pentazocine, (-)-
  • Pentazocine, L-
  • (-)-Pentazocine
  • (-)-cis-Pentazocine
  • cis-(-)-Pentazocine
  • Pentazocine 2R,6R,11R-form
  • (-)-alpha-Pentazocine
  • Pentazocaine
  • Sosegon

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
White to very pale tan crystalline powderexp.
Odour
ODORLESS OR ALMOST ODORLESSexp.
Taste
SLIGHTLY BITTER TASTEexp.
Melting point
145.4 to 147.2exp.
Solubility
White to pale cream colored, odorless crystalline powder, there are two forms melting at about 218 deg & 254 °C, respectively, Sol 1 part in 30 parts of water, 1 part in 16 parts alcohol, 1 part in 4 parts chloroform, very slightly sol in…exp.

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
285.43 g/molcalc.
Exact mass
285.2093 Dacalc.
LogP (octanol/water)
3.88calc.
Topological polar surface area
23.47 Ųcalc.
Hydrogen bond donors
1calc.
Hydrogen bond acceptors
2calc.
Rotatable bonds
2calc.
Heavy atoms
21calc.
Rings
3calc.
Aromatic rings
1calc.
Fraction sp3 carbons
0.58calc.
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, c1ccc2c(c1)CC1CC2CCN1

c1ccc2c(c1)CC1CC2CCN1

3 rings, 13 atoms, the (±)-Benzomorphan ring system.

161 other chemicals share this scaffold

Safety and hazards

GHS classification summary, not a safety data sheet

GHS signal word
Warning
GHS07: Harmful or irritant
Harmful or irritant

Hazard statements

  • H302Harmful if swallowed.
Precautionary statements (5)
  • P264Wash skin thoroughly after handling.
  • P270Do not eat, drink or smoke when using this product.
  • P301 + P317If swallowed: Get medical help.
  • P330Rinse mouth.
  • 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

Pentazocine suppliers

Trading restrictions apply to this substance

Narcotic drug

Pentazocine is prohibited on CompoundList. Listings, quotes and messages are disabled. This page is kept for information only.

Listing and enquiries are not allowed for this substance.

Reference: UN Single Convention on Narcotic Drugs 1961, HS 2022 subheading 2933.33 (fentanyls and related analgesics)

Our policy on controlled substances

Pentazocine price

Indicative price range per kg from live supplier offers

Prices are not shown for prohibited substances.

Uses and applications

What the substance is used for, by industry and function

Medication: Vet.

Use classes: Pharmaceuticals.

Pharmacological actions

  • Adjuvants, Anesthesia
  • Analgesics, Opioid
  • Narcotic Antagonists
  • Narcotics

Roles

  • analgesic
  • antipsychotic agent
  • central nervous system depressant
  • central nervous system drug
  • pharmaceutical
  • psychotropic drug
  • tranquilizing drug

Functional uses

  • Pharmaceutical

Pharmacology

Pentazocine is a Partial Opioid Agonist/Antagonist. The mechanism of action of pentazocine is as a Competitive Opioid Antagonist and Partial Opioid Agonist.

How it is made

1,2,3,4,5,6-Hexahydro-6,11-dimethyl-2,6-methano-3-benzazocin-8-ol is condensed with 1-bromo-3-methyl-2-butene by refluxing in n,n-dimethylformamide in the presence of sodium bicarbonate.

Regulatory status

Inventories, regulations and trade controls that list this substance

Narcotic drug

Pentazocine is prohibited on CompoundList. Listings, quotes and messages are disabled. This page is kept for information only.

Listing and enquiries are not allowed for this substance.

Reference: UN Single Convention on Narcotic Drugs 1961, HS 2022 subheading 2933.33 (fentanyls and related analgesics)

Our policy on controlled substances

Controls

  • US DEA controlled substance or listed chemical
  • Controlled narcotic drug

HS code and trade data

Customs classification and reported world trade statistics

Global trade

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

HS 2933.33Exact HS code

Alfentanil (INN), anileridine (INN), bezitramide (INN), bromazepam (INN), carfentanil…

World exports in 2024
$83.8M
+13.4% vs 2023, imports $95.2M
2019 to 2024
Top exporters
  1. Switzerland * partner reported31.1%
  2. United States17.5%
  3. India * partner reported16.0%
Top importers
  1. Germany27.9%
  2. Spain12.8%
  3. Brazil9.4%

* Partner reported figures, a lower bound.

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

The HS code shown for Pentazocine is indicative (it was matched by name in the HS nomenclature). Confirm the classification with your customs broker before shipping.

Frequently asked questions

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

What is Pentazocine?

Pentazocine is a benzazocine.

What is the CAS number of Pentazocine?

The CAS registry number of Pentazocine is 359-83-1. Other or deprecated CAS numbers: 7488-49-5.

What is the molecular formula and weight of Pentazocine?

The molecular formula of Pentazocine is C19H27NO and its molar mass is 285.43 g/mol.

What is Pentazocine used for?

Medication: Vet. Use classes: Pharmaceuticals.

Is Pentazocine hazardous?

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

What is the HS code of Pentazocine?

Pentazocine is usually classified under HS code 293333 (Alfentanil (INN), anileridine (INN), bezitramide (INN), bromazepam (INN), carfentanil…). This is indicative, confirm it with your customs broker before shipping.

Can I buy Pentazocine on CompoundList?

No. Pentazocine is on our prohibited list, so listings, quotes and messages for it are disabled. This page is kept for information only.

Guides for buyers

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

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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