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Lipids and fatty acids

18-Hydroxyoctadecanoic acid

Also known as Octadecanoic acid, 18-hydroxy-, 18-hydroxystearic acid, Monohydroxystearic acid, 18-

CAS 3155-42-8Formula C18H36O3Molar mass 300.48 g/mol
1 supplier listed
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18-Hydroxyoctadecanoic acid chemical structure, C18H36O3, CAS 3155-42-8
2D chemical structure

Key facts

What buyers check first

All properties
CAS number
3155-42-8
Formula
C18H36O3
Molar mass
300.48 g/mol
HS code
291819
Category
Lipids and fatty acids

What is 18-Hydroxyoctadecanoic acid?

Plain description, key identifiers and synonyms

18-hydroxyoctadecanoic acid is an -hydroxy-long-chain fatty acid that is octadecanoic (stearic) acid in which one of the hydrogens of the terminal methyl group has been replaced by a hydroxy group. It has a role as an apoptosis inducer. It is an omega-hydroxy-long-chain fatty acid and a hydroxyoctadecanoic acid. It is a conjugate acid of a 18-hydroxyoctadecanoate.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
18-hydroxyoctadecanoic acid
CAS number
3155-42-8
Molecular formula
C18H36O3
UNII
CCR5P6ICT2
MDL number
MFCD30185943
InChIKey
VLHZUYUOEGBBJB-UHFFFAOYSA-N
InChI
InChI=1S/C18H36O3/c19-17-15-13-11-9-7-5-3-1-2-4-6-8-10-12-14-16-18(20)21/h19H,1-17H2,(H,20,21)
SMILES (canonical and isomeric)
C(CCCCCCCCC(=O)O)CCCCCCCCO

Synonyms

  • Octadecanoic acid, 18-hydroxy-
  • 18-hydroxystearic acid
  • Monohydroxystearic acid, 18-
  • 18-hydroxyoctadecanoicacid
  • 18-hydroxy stearic acid
  • 18-hydroxy-octadecanoic acid
  • Octadecanoic acid,18-ahydroxy-
  • omega-hydroxystearic acid
  • 18-HODA
  • omega-hydroxyoctadecanoic acid
  • omega-hydroxy-octadecanoic acid

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
300.48 g/molcalc.
Exact mass
300.2664 Dacalc.
LogP (octanol/water)
5.3calc.
Topological polar surface area
57.53 Ųcalc.
Hydrogen bond donors
2calc.
Hydrogen bond acceptors
2calc.
Rotatable bonds
17calc.
Heavy atoms
21calc.
Rings
0calc.
Aromatic rings
0calc.
Fraction sp3 carbons
0.94calc.
Formal charge
0calc.
Stereocentres
0calc.
Lipinski rule of five
Passes (1 violation)calc.

Calculated for screening. Confirm critical figures with the supplier.

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.

18-Hydroxyoctadecanoic acid suppliers

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Where suppliers are based

1 supplier in 1 country

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18-Hydroxyoctadecanoic 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

Roles

  • apoptosis inducer

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 18-Hydroxyoctadecanoic 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 18-Hydroxyoctadecanoic acid is indicative (it was assigned by structure rules). Confirm the classification with your customs broker before shipping.

Frequently asked questions

Quick answers about 18-Hydroxyoctadecanoic acid, based on the data on this page

What is 18-Hydroxyoctadecanoic acid?

18-hydroxyoctadecanoic acid is an -hydroxy-long-chain fatty acid that is octadecanoic (stearic) acid in which one of the hydrogens of the terminal methyl group has been replaced by a hydroxy group. It has a role as an apoptosis inducer. It is an omega-hydroxy-long-chain fatty acid and a hydroxyoctadecanoic acid.

What is the CAS number of 18-Hydroxyoctadecanoic acid?

The CAS registry number of 18-Hydroxyoctadecanoic acid is 3155-42-8.

What is the molecular formula and weight of 18-Hydroxyoctadecanoic acid?

The molecular formula of 18-Hydroxyoctadecanoic acid is C18H36O3 and its molar mass is 300.48 g/mol.

What is 18-Hydroxyoctadecanoic acid used for?

Known uses and roles of 18-Hydroxyoctadecanoic acid include apoptosis inducer.

Is 18-Hydroxyoctadecanoic acid hazardous?

No GHS hazard classification for 18-Hydroxyoctadecanoic acid 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 18-Hydroxyoctadecanoic acid?

18-Hydroxyoctadecanoic acid is usually classified under HS code 291819 (Carboxylic acids with alcohol function but without other oxygen function, their…). This is indicative, confirm it with your customs broker before shipping.

Where can I buy 18-Hydroxyoctadecanoic acid?

CompoundList lists 1 supplier of 18-Hydroxyoctadecanoic acid in United States. Send one free request to get and compare quotes. Your contact details stay private until you accept a quote.

What is the price of 18-Hydroxyoctadecanoic acid?

Suppliers quote 18-Hydroxyoctadecanoic acid 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 18-Hydroxyoctadecanoic 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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