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Steroids and sterols

Ursodeoxycholic acid

Also known as ursodiol, UDCA, Actigall

CAS 128-13-2Formula C24H40O4Molar mass 392.58 g/molEC 204-879-3
GHS signal word: Warning. Pictograms: Harmful or irritant 192 suppliers listed Drug substance
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Ursodeoxycholic acid chemical structure, C24H40O4, CAS 128-13-2
2D chemical structure

Key facts

What buyers check first

All properties
CAS number
128-13-2
Formula
C24H40O4
Molar mass
392.58 g/mol
EC number
204-879-3
HS code
291819
Category
Steroids and sterols

What is Ursodeoxycholic acid?

Plain description, key identifiers and synonyms

Ursodeoxycholic acid is a bile acid found in the bile of bears (Ursidae) as a conjugate with taurine. Used therapeutically, it prevents the synthesis and absorption of cholesterol and can lead to the dissolution of gallstones. It has a role as a mouse metabolite and a human metabolite. It is a C24-steroid, a dihydroxy-5beta-cholanic acid and a bile acid. It is a conjugate acid of an ursodeoxycholate.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
(4R)-4-[(3R,5S,7S,8R,9S,10S,13R,14S,17R)-3,7-dihydroxy-10,13-dimethyl-2,3,4,5,6,7,8,9,11,12,14,15,16,17-tetradecahydro-1H-cyclopenta[a]phenanthren-17-yl]pentanoic acid
CAS number
128-13-2 CAS number cross-checkedOther or deprecated CAS: 108609-27-4
EC number
204-879-3
Molecular formula
C24H40O4
UNII
724L30Y2QR
MDL number
MFCD00003680
INCI name
URSODIOL
InChIKey
RUDATBOHQWOJDD-UZVSRGJWSA-N
InChI
InChI=1S/C24H40O4/c1-14(4-7-21(27)28)17-5-6-18-22-19(9-11-24(17,18)3)23(2)10-8-16(25)12-15(23)13-20(22)26/h14-20,22,25-26H,4-13H2,1-3H3,(H,27,28)/t14-,15+,16-,17-,18+,19+,20+,22+,23+,24-/m1/s1
Canonical SMILES
CC(CCC(=O)O)C1CCC2C3C(O)CC4CC(O)CCC4(C)C3CCC12C
Isomeric SMILES
C[C@H](CCC(=O)O)[C@H]1CC[C@@H]2[C@@]1(CC[C@H]3[C@H]2[C@H](C[C@H]4[C@@]3(CC[C@H](C4)O)C)O)C

Synonyms

  • ursodiol
  • UDCA
  • Actigall
  • Ursodesoxycholic acid
  • Urso Forte
  • Deursil
  • 3alpha,7beta-Dihydroxy-5beta-cholan-24-oic acid
  • Acido ursodeoxicolico
  • Urso 250
  • Ursonorm
  • Acidum ursodeoxycholicum
  • (3alpha,5beta,7beta)-3,7-dihydroxycholan-24-oic acid
  • acide ursodeoxycholique
  • Deoxyursocholic Acid
  • Ursacholic Acid
  • Cholan-24-oic acid, 3,7-dihydroxy-, (3alpha,5beta,7beta)-
  • Cholan-24-oic acid, 3,7-dihydroxy-, (3-alpha,5-beta,7-beta)-
  • 3 alpha,7 beta Dihydroxy 5 beta cholan 24 oic Acid
  • Acid, Ursacholic
  • Acid, Deoxyursocholic
  • Acid, Ursodeoxycholic
  • Ursodeoxycholate, Sodium
  • 3 alpha,7 beta-Dihydroxy-5 beta-cholan-24-oic Acid
  • Cholurso
  • Usodiol
Show all 38 synonyms
  • Ursodiol 200 mg
  • Ursodiol 400 mg
  • Reltone 200 mg
  • Reltone 400 mg
  • URUSA
  • acido ursodesossicolico
  • acidum ursodesoxycholicum
  • Ursodeoxycholic Acid (Ursodiol)
  • ursodeoxycholate
  • Ursolvan
  • UrSO
  • Delursan
  • Ursofalk

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
392.58 g/molcalc.
Exact mass
392.2927 Dacalc.
LogP (octanol/water)
4.48calc.
Topological polar surface area
77.76 Ųcalc.
Hydrogen bond donors
3calc.
Hydrogen bond acceptors
3calc.
Rotatable bonds
4calc.
Heavy atoms
28calc.
Rings
4calc.
Aromatic rings
0calc.
Fraction sp3 carbons
0.96calc.
Formal charge
0calc.
Stereocentres
10calc.
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)CCC1C3CCCC3CCC21

C1CCC2C(C1)CCC1C3CCCC3CCC21

4 rings, 17 atoms.

1,694 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

  • H315Causes skin irritation.
  • H319Causes serious eye irritation.
Precautionary statements (9)
  • P264Wash skin thoroughly after handling.
  • P264 + P265Wash skin thoroughly after handling. Do not touch eyes.
  • P280Wear protective gloves, protective clothing, eye protection and face protection.
  • P302 + P352If on skin: Wash with plenty of water.
  • P305 + P351 + P338If in eyes: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.
  • P321Specific treatment (see supplemental first aid instructions on the label).
  • P332 + P317If skin irritation occurs: Get medical help.
  • P337 + P317If eye irritation persists: Get medical help.
  • P362 + P364Take off contaminated clothing. And wash it before reuse.

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

Ursodeoxycholic acid suppliers

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Where suppliers are based

192 suppliers in 25 countries

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Ursodeoxycholic acid 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

Cosmetic ingredient, INCI name URSODIOL(skin protecting, skin conditioning - miscellaneous)

Pharmacological actions

  • Cholagogues and Choleretics

Roles

  • animal metabolite
  • anti-inflammatory agent
  • anti-obesity agent
  • antidyskinesia agent
  • antifibrotic agent
  • antimicrobial agent
  • antineoplastic agent
  • antiparkinson drug
  • antirheumatic drug
  • antiviral agent
  • cardiovascular drug
  • eukaryotic metabolite
  • hepatoprotective agent
  • human metabolite
  • hypoglycemic agent
  • mammalian metabolite
  • metabolite
  • mouse metabolite
  • pharmaceutical
  • protective agent

Functional uses

  • Humectant
  • Softener and conditioner

Cosmetic functions

  • Skin conditioning - miscellaneous
  • Skin protecting

Pharmacology

Ursodiol is a synthetically-derived form of ursodiol, a bile acid produced by the liver and secreted and stored in the gallbladder. Also produced by the Chinese black bear liver, ursodiol has been used in the treatment of liver disease for centuries. This agent dissolves or prevents cholesterol gallstones by blocking hepatic cholesterol production and decreasing bile cholesterol. Ursodiol also reduces the absorption of cholesterol from the intestinal tract.

Regulatory status

Inventories, regulations and trade controls that list this substance

Health and food

  • EU cosmetic ingredient inventory
  • Active ingredient in FDA approved drug labels

HS code and trade data

Customs classification and reported world trade statistics

Global trade

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

HS 2918.19Indicative HS code

Carboxylic acids with alcohol function but without other oxygen function, their…

World exports in 2024
$1.37B
+0.5% vs 2023, imports $1.18B
2019 to 2024
Top exporters
  1. China23.7%
  2. Italy14.7%
  3. India * partner reported12.0%
Top importers
  1. Germany11.7%
  2. South Korea9.8%
  3. Italy9.6%

* Partner reported figures, a lower bound.

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

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

Frequently asked questions

Quick answers about Ursodeoxycholic acid, based on the data on this page

What is Ursodeoxycholic acid?

Ursodeoxycholic acid is a bile acid found in the bile of bears (Ursidae) as a conjugate with taurine. Used therapeutically, it prevents the synthesis and absorption of cholesterol and can lead to the dissolution of gallstones. It has a role as a mouse metabolite and a human metabolite.

Is Ursodeoxycholic acid hazardous?

Ursodeoxycholic acid carries the GHS signal word "Warning". Main hazards: causes skin irritation, causes serious eye irritation. This summary is not an SDS, always read the supplier safety data sheet.

Guides for buyers

Practical guides that help when you source, ship or handle Ursodeoxycholic acid

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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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