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Cardiovascular and metabolic drugs

Orlistat

Also known as Tetrahydrolipstatin, Xenical, Orlipastat

CAS 96829-58-2Formula C29H53NO5Molar mass 495.75 g/molEC 639-755-1
GHS hazard pictograms. Pictograms: Hazardous to the environment 110 suppliers listed Drug substance
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Orlistat chemical structure, C29H53NO5, CAS 96829-58-2
2D chemical structure

Key facts

What buyers check first

All properties
Appearance
Crystals
Melting point
43 °C
Solubility
Practically insoluble in water, freely soluble in chloroform, and very soluble in methan…
HS code
293220
Category
Cardiovascular and metabolic drugs
Illustrative photo, closed blue fibre drums on a pallet in a warehouse
Typical packagingIllustrative packaging image, not the actual product

What is Orlistat?

Plain description, key identifiers and synonyms

Orlistat is a carboxylic ester resulting from the formal condensation of the carboxy group of N-formyl-L-leucine with the hydroxy group of (3S,4S)-3-hexyl-4-[(2S)-2-hydroxytridecyl]oxetan-2-one. A pancreatic lipase inhibitor, it is used as an anti-obesity drug. It has a role as an EC 3.1.1.3 (triacylglycerol lipase) inhibitor, an EC 2.3.1.85 (fatty acid synthase) inhibitor, an anti-obesity agent and a bacterial metabolite. It is a member of formamides, a L-leucine derivative, a carboxylic ester and a beta-lactone.

Orlistat is a drug designed to treat obesity.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
[(2S)-1-[(2S,3S)-3-hexyl-4-oxooxetan-2-yl]tridecan-2-yl] (2S)-2-formamido-4-methylpentanoate
CAS number
96829-58-2 CAS number cross-checkedOther or deprecated CAS: 104872-04-0
EC number
639-755-1
Molecular formula
C29H53NO5
UNII
95M8R751W8
MDL number
MFCD05662360
InChIKey
AHLBNYSZXLDEJQ-FWEHEUNISA-N
InChI
InChI=1S/C29H53NO5/c1-5-7-9-11-12-13-14-15-16-18-24(34-29(33)26(30-22-31)20-23(3)4)21-27-25(28(32)35-27)19-17-10-8-6-2/h22-27H,5-21H2,1-4H3,(H,30,31)/t24-,25-,26-,27-/m0/s1
Canonical SMILES
CCCCCCCCCCCC(CC1OC(=O)C1CCCCCC)OC(=O)C(CC(C)C)NC=O
Isomeric SMILES
CCCCCCCCCCC[C@@H](C[C@H]1[C@@H](C(=O)O1)CCCCCC)OC(=O)[C@H](CC(C)C)NC=O

Synonyms

  • Tetrahydrolipstatin
  • Xenical
  • Orlipastat
  • Alli
  • (-)-Tetrahydrolipstatin
  • THLP
  • tetrahydrolipastatin
  • Ro 18-0647/002
  • orlistatum
  • [(2S)-1-[(2S,3S)-3-hexyl-4-oxooxetan-2-yl]tridecan-2-yl] (2S)-2-formamido-4-methylpentanoate
  • Ro-18-0647/002
  • (2S)-1-[(2S,3S)-3-hexyl-4-oxooxetan-2-yl]tridecan-2-yl (2S)-2-formamido-4-methylpentanoate
  • Ro-180647-002
  • L-Leucine, N-formyl-, 1-((3-hexyl-4-oxo-2-oxetanyl)methyl)dodecyl ester, (2S-(2alpha(R*),3beta))-
  • Beacita
  • ((2S)-1-((2S,3S)-3-hexyl-4-oxooxetan-2-yl)tridecan-2-yl) (2S)-2-formamido-4-methylpentanoate
  • (2S)-1-((2S,3S)-3-hexyl-4-oxooxetan-2-yl)tridecan-2-yl (2S)-2-formamido-4-methylpentanoate
  • Ro 18 0647
  • Orlipastatum
  • N-Formyl-L-leucine (1S)-1-[[(2S,3S)-3-hexyl-4-oxo-2-oxetanyl]methyl]dodecyl ester
  • Orlistat (Standard)
  • Ro-18-0647
  • L-Leucine, N-formyl-, (1S)-1-[[(2S,3S)-3-hexyl-4-oxo-2-oxetanyl]methyl]dodecyl ester
  • Orlistat (Alli, Xenical)
  • N-Formyl-L-leucine, ester with (3S,4S)-3-hexyl-4-((2S)-2-hydroxytridecyl)-2-oxetanone
Show all 32 synonyms
  • L-Leucine, N-formyl-, (1S)-1-(((2S,3S)-3-hexyl-4-oxo-2-oxetanyl)methyl)dodecyl ester
  • [(1S)-1-[[(2S,3S)-3-hexyl-4-oxo-oxetan-2-yl]methyl]dodecyl] (2S)-2-formamido-4-methyl-pentanoate
  • Orlistat Powder
  • (S)-(S)-1-((2S,3S)-3-Hexyl-4-oxooxetan-2-yl)tridecan-2-yl 2-formamido-4-methylpentanoate
  • (2S)-1-[(2S,3S)-3-hexyl-4-oxooxetan-2-yl]tridecan-2-yl N-formyl-L-leucinate
  • Xenical (TN)
  • N-formyl-L-leucine (1S)-1-{[(2S,3S)-3-hexyl-4-oxo-2-oxetanyl]methyl}dodecyl ester

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
Crystalsexp.
Melting point
43 °Cexp.
Solubility
Practically insoluble in water, freely soluble in chloroform, and very soluble in methanol and ethanol.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
495.75 g/molcalc.
Exact mass
495.3924 Dacalc.
LogP (octanol/water)
6.88calc.
Topological polar surface area
81.7 Ųcalc.
Hydrogen bond donors
1calc.
Hydrogen bond acceptors
5calc.
Rotatable bonds
23calc.
Heavy atoms
35calc.
Rings
1calc.
Aromatic rings
0calc.
Fraction sp3 carbons
0.9calc.
Formal charge
0calc.
Stereocentres
4calc.
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=C1CCO1

O=C1CCO1

1 ring, 5 atoms, the beta-Propiolactone ring system.

185 other chemicals share this scaffold

Safety and hazards

GHS classification summary, not a safety data sheet

GHS classification
Hazard pictograms
GHS09: Hazardous to the environment
Hazardous to the environment

Hazard statements

  • H411Toxic to aquatic life with long lasting effects.
  • H412Harmful to aquatic life with long lasting effects.
Precautionary statements (3)
  • P273Avoid release to the environment.
  • P391Collect spillage.
  • 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

Orlistat suppliers

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Where suppliers are based

110 suppliers in 16 countries

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Orlistat 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

Antiobesity agent.

For obesity management including weight loss and weight maintenance when used in conjunction with a reduced-calorie diet. Also used to reduce the risk for weight regain after prior weight loss.

Pharmacological actions

  • Anti-Obesity Agents
  • Enzyme Inhibitors
  • Lipid Regulating Agents

Roles

  • anti-obesity agent
  • bacterial metabolite
  • enzyme inhibitor
  • metabolite
  • prokaryotic metabolite

Pharmacology

Orlistat is an Intestinal Lipase Inhibitor. The mechanism of action of orlistat is as a Lipase Inhibitor.

How it is made

Isolation from fermentation broth of Streptomyces toxyricini: P Hadvary et al, EP 129748, eidem, US 4598089 (1985, 1986 both to Hoffmann-LaRoche)

Regulatory status

Inventories, regulations and trade controls that list this substance

Health and food

  • 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 Orlistat is traded under.

HS 2932.20Indicative HS code

Lactones

World exports in 2024
$1.97B
−4.7% vs 2023, imports $2.07B
2019 to 2024
Top exporters
  1. China56.3%
  2. India * partner reported7.4%
  3. Germany7.3%
Top importers
  1. United States14.2%
  2. India * partner reported13.5%
  3. Brazil8.5%

* Partner reported figures, a lower bound.

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

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

Frequently asked questions

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

What is Orlistat?

Orlistat is a carboxylic ester resulting from the formal condensation of the carboxy group of N-formyl-L-leucine with the hydroxy group of (3S,4S)-3-hexyl-4-[(2S)-2-hydroxytridecyl]oxetan-2-one. A pancreatic lipase inhibitor, it is used as an anti-obesity drug.

What is the CAS number of Orlistat?

The CAS registry number of Orlistat is 96829-58-2. Other or deprecated CAS numbers: 104872-04-0.

What is the molecular formula and weight of Orlistat?

The molecular formula of Orlistat is C29H53NO5 and its molar mass is 495.75 g/mol.

What is Orlistat used for?

Antiobesity agent. For obesity management including weight loss and weight maintenance when used in conjunction with a reduced-calorie diet. Also used to reduce the risk for weight regain after prior weight loss.

Is Orlistat hazardous?

Orlistat has a GHS hazard classification. Main hazards: toxic to aquatic life with long lasting effects, harmful to aquatic life with long lasting effects. This summary is not an SDS, always read the supplier safety data sheet.

What is the HS code of Orlistat?

Orlistat is usually classified under HS code 293220 (Lactones). This is indicative, confirm it with your customs broker before shipping.

Where can I buy Orlistat?

CompoundList lists 110 suppliers of Orlistat in China, United States, India, Germany and 12 more. Send one free request to get and compare quotes. Your contact details stay private until you accept a quote.

Where can I buy Orlistat in India?

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

What is the price of Orlistat?

Suppliers quote Orlistat 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 Orlistat

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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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