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Analgesics and anti-inflammatories

Celastrol

Also known as Tripterin, Tripterine, (2R,4aS,6aS,12bR,14aS,14bR)-10-hydroxy-2,4a,6a,9,12b,14a-hexamethyl-11-oxo-1,2,3,4,4a,5,6,6a,11,12b,13,14,14a,14b-tetradecahydropicene-2-carboxylic acid

CAS 34157-83-0Formula C29H38O4Molar mass 450.62 g/molEC 636-472-5
GHS signal word: Danger. Pictograms: Acute toxicity (severe) 56 suppliers listed
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Celastrol chemical structure, C29H38O4, CAS 34157-83-0
2D chemical structure

Key facts

What buyers check first

All properties
CAS number
34157-83-0
Formula
C29H38O4
Molar mass
450.62 g/mol
EC number
636-472-5
HS code
291830
Category
Analgesics and anti-inflammatories

What is Celastrol?

Plain description, key identifiers and synonyms

Celastrol is a pentacyclic triterpenoid that is 24,25,26-trinoroleana-1(10),3,5,7-tetraen-29-oic acid bearing an oxo substituent at position 2, a hydroxy substituent at position 3 and two methyl groups at positions 9 and 13. An antioxidant and anti-inflammatory agent. Potently inhibits lipid peroxidation in mitochondria and inhibits TNF-alpha-induced NFB activation. Also shown to inhibit topoisomerase II activity in vitro (IC50 = 7.41 M). It has a role as an antioxidant, a metabolite, an anti-inflammatory drug, an antineoplastic agent, an EC 5.99.1.3 [DNA topoisomerase (ATP-hydrolysing)] inhibitor and a Hsp90 inhibitor. It is a monocarboxylic acid and a pentacyclic triterpenoid.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
(2R,4aS,6aR,6aS,14aS,14bR)-10-hydroxy-2,4a,6a,6a,9,14a-hexamethyl-11-oxo-1,3,4,5,6,13,14,14b-octahydropicene-2-carboxylic acid
CAS number
34157-83-0 CAS number cross-checked
EC number
636-472-5
Molecular formula
C29H38O4
UNII
L8GG98663L
MDL number
MFCD03424073
InChIKey
KQJSQWZMSAGSHN-JJWQIEBTSA-N
InChI
InChI=1S/C29H38O4/c1-17-18-7-8-21-27(4,19(18)15-20(30)23(17)31)12-14-29(6)22-16-26(3,24(32)33)10-9-25(22,2)11-13-28(21,29)5/h7-8,15,22,31H,9-14,16H2,1-6H3,(H,32,33)/t22-,25-,26-,27+,28-,29+/m1/s1
Canonical SMILES
CC1=C(O)C(=O)C=C2C1=CC=C1C2(C)CCC2(C)C3CC(C)(C(=O)O)CCC3(C)CCC12C
Isomeric SMILES
CC1=C(C(=O)C=C2C1=CC=C3[C@]2(CC[C@@]4([C@@]3(CC[C@@]5([C@H]4C[C@](CC5)(C)C(=O)O)C)C)C)C)O

Synonyms

  • Tripterin
  • Tripterine
  • (2R,4aS,6aS,12bR,14aS,14bR)-10-hydroxy-2,4a,6a,9,12b,14a-hexamethyl-11-oxo-1,2,3,4,4a,5,6,6a,11,12b,13,14,14a,14b-tetradecahydropicene-2-carboxylic acid
  • (2R,4aS,6aR,6aS,14aS,14bR)-10-hydroxy-2,4a,6a,6a,9,14a-hexamethyl-11-oxo-1,3,4,5,6,13,14,14b-octahydropicene-2-carboxylic acid
  • D:A-Friedo-24-noroleana-1(10),3,5,7-tetraen-29-oic acid, 3-hydroxy-2-oxo-, (20alpha)-
  • 3-Hydroxy-24-nor-2-oxo-1(10),3,5,7-friedelatetraen-29-oic Acid
  • Celastrol (>85%)
  • 3-hydroxy-9beta,13alpha-dimethyl-2-oxo-24,25,26-trinoroleana-1(10),3,5,7-tetraen-29-oic acid
  • 2-Oxo-3-hydroxy-24-norfriedelane-1(10),3,5,7-tetraene-29-oic acid
  • Celastrol?
  • 34157-83-0 (castrol)
  • Celastrol,Tripterin
  • Celastrol (Standard)
  • Pristimerin (Celastrol)
  • DivK1c_000718
  • 24,25,26-Trinoroleana-1(10),3,5,7-tetraen-29-oic acid, 3-hydroxy-9,13-dimethyl-2-oxo-, (9beta,13alpha,14beta,20.alpha.)-
  • Celastrol, >=98% (HPLC), solid
  • compound 2
  • (2R,4aS,6aR,6aS,14aS,14bR)-10-hydroxy-2,4a,6a,6a,9,14a-hexamethyl-11-oxo-1,3,4,5,6,13,14,14b-octahydropicene-2-carboxylicacid
  • (20alpha)-3-hydroxy-2-oxo-D:A-Friedo-24-noroleana-1(10),3,5,7-tetraen-29-oate
  • (20alpha)-3-hydroxy-2-oxo-D:A-Friedo-24-noroleana-1(10),3,5,7-tetraen-29-oic acid
  • 24-nor-D:a-friedooleana-1(10),3,5,7-tetraen-29-oic acid, 3-hydroxy-2-oxo-
  • 3-Hydroxy-2-oxo-24-nor-D:A-friedooleana-1(10),3,5,7-tetraen-29-oic acid
  • (2R,4aS,6aS,12bR,14aS,14bR)-1,2,3,4,4a,5,6,6a,11,12b,13,14,14a,14b-tetradecahydro-10-hydroxy-2,4a,6a,9,12b,14a-hexamethyl-11-oxo-2-picenecarboxylic acid
  • (9b,13a,14b,20a)-3-Hydroxy-9,13-dimethyl-2-oxo-24, 25,26-trinoroleana-1(10),3,5,7-tetraen-29-oic acid
Show all 29 synonyms
  • (9ss,13alpha,14ss,20alpha)-3-Hydroxy-9,13-dimethyl-2-oxo-24,25,26-trinoroleana-1(10),3,5,7-tetraen-29-oic acid
  • 1,2,3,4,4a,5,6,6a, 11,12b,13,14,14a,14b-tetradecahydro-10-hydroxy-2,4a,6a,9,12b, 14a-hexamethyl-11-oxo-2-Picenecarboxylic acid
  • 2-Picenecarboxylic acid, 1,2,3,4,4a,5,6,6a,11,12b,13,14,14a,14b-tetradecahydro-10-hydroxy-2,4a,6a,9,12b,14a-hexamethyl-11-oxo-, (2R,4aS,6aS,12bR,14aS,14bR)-
  • 2-Picenecarboxylic acid,2,3,4,4a,5,6,6a,11,12b,13,14,14a,14b-tetradecahydro-10-hydroxy-2,4a,6a,9,12b,14a-hexamethyl-11-oxo-

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
450.62 g/molcalc.
Exact mass
450.277 Dacalc.
LogP (octanol/water)
6.7calc.
Topological polar surface area
74.6 Ųcalc.
Hydrogen bond donors
2calc.
Hydrogen bond acceptors
3calc.
Rotatable bonds
1calc.
Heavy atoms
33calc.
Rings
5calc.
Aromatic rings
0calc.
Fraction sp3 carbons
0.66calc.
Formal charge
0calc.
Stereocentres
6calc.
Lipinski rule of five
Passes (1 violation)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=CC2=CC=C3C(CCC4C3CCC3CCCCC34)C2=C1

O=C1C=CC2=CC=C3C(CCC4C3CCC3CCCCC34)C2=C1

5 rings, 23 atoms.

5 other chemicals share this scaffold

Safety and hazards

GHS classification summary, not a safety data sheet

GHS signal word
Danger
GHS06: Acute toxicity (severe)
Acute toxicity (severe)

Hazard statements

  • H301Toxic if swallowed.
Precautionary statements (7)
  • P264Wash skin thoroughly after handling.
  • P270Do not eat, drink or smoke when using this product.
  • P301 + P316If swallowed: Get emergency medical help immediately.
  • P321Specific treatment (see supplemental first aid instructions on the label).
  • 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

Celastrol suppliers

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All 56 suppliers
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Where suppliers are based

56 suppliers in 8 countries

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Celastrol 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

Roles

  • Hsp90 inhibitor
  • anti-inflammatory agent
  • anti-inflammatory drug
  • antineoplastic agent
  • antioxidant
  • enzyme inhibitor
  • metabolite
  • pharmaceutical
  • topoisomerase inhibitor

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 Celastrol is traded under.

HS 2918.30Indicative HS code

Carboxylic acids with aldehyde or ketone function but without other oxygen function…

World exports in 2024
$813M
−39.8% vs 2023, imports $1.23B
2019 to 2024
Top exporters
  1. China43.3%
  2. India * partner reported10.4%
  3. United States6.8%
Top importers
  1. Singapore33.1%
  2. Germany7.2%
  3. Japan6.9%

* Partner reported figures, a lower bound.

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

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

Frequently asked questions

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

What is Celastrol?

Celastrol is a pentacyclic triterpenoid that is 24,25,26-trinoroleana-1(10),3,5,7-tetraen-29-oic acid bearing an oxo substituent at position 2, a hydroxy substituent at position 3 and two methyl groups at positions 9 and 13. An antioxidant and anti-inflammatory agent.

What is the CAS number of Celastrol?

The CAS registry number of Celastrol is 34157-83-0.

What is the molecular formula and weight of Celastrol?

The molecular formula of Celastrol is C29H38O4 and its molar mass is 450.62 g/mol.

What is Celastrol used for?

Known uses and roles of Celastrol include anti-inflammatories in pharmaceuticals, hsp90 inhibitor, anti-inflammatory agent, anti-inflammatory drug, antineoplastic agent and 5 more.

Is Celastrol hazardous?

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

What is the HS code of Celastrol?

Celastrol is usually classified under HS code 291830 (Carboxylic acids with aldehyde or ketone function but without other oxygen function…). This is indicative, confirm it with your customs broker before shipping.

Where can I buy Celastrol?

CompoundList lists 56 suppliers of Celastrol in China, United States, United Kingdom, Netherlands and 4 more. Send one free request to get and compare quotes. Your contact details stay private until you accept a quote.

What is the price of Celastrol?

Suppliers quote Celastrol 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 Celastrol

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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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