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Lipids and fatty acids

Elaidic acid

Also known as (E)-octadec-9-enoic acid, trans-Oleic acid, trans-9-Octadecenoic acid

CAS 112-79-8Formula C18H34O2Molar mass 282.47 g/molEC 204-006-6
GHS signal word: Warning. Pictograms: Harmful or irritant 12 suppliers listed
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Elaidic acid chemical structure, C18H34O2, CAS 112-79-8
2D chemical structure

Key facts

What buyers check first

All properties
CAS number
112-79-8
Formula
C18H34O2
Molar mass
282.47 g/mol
EC number
204-006-6
HS code
291615
Category
Lipids and fatty acids

What is Elaidic acid?

Plain description, key identifiers and synonyms

Elaidic acid is a 9-octadecenoic acid and the trans-isomer of oleic acid. It has a role as a food component. It is a conjugate acid of an Octadec-9-enoic acid anion and an elaidate. It derives from a hydride of a trans-octadec-9-ene.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
(E)-octadec-9-enoic acid
CAS number
112-79-8 CAS number cross-checkedOther or deprecated CAS: 112-80-1, 2027-47-6
EC numbers
204-006-6, 217-977-6
Molecular formula
C18H34O2
UNII
4837010H8C
MDL number
MFCD00063954
InChIKey
ZQPPMHVWECSIRJ-MDZDMXLPSA-N
InChI
InChI=1S/C18H34O2/c1-2-3-4-5-6-7-8-9-10-11-12-13-14-15-16-17-18(19)20/h9-10H,2-8,11-17H2,1H3,(H,19,20)/b10-9+
Canonical SMILES
CCCCCCCCC=CCCCCCCCC(=O)O
Isomeric SMILES
CCCCCCCC/C=C/CCCCCCCC(=O)O

Synonyms

  • (E)-octadec-9-enoic acid
  • trans-Oleic acid
  • trans-9-Octadecenoic acid
  • 9-Octadecenoic acid, (E)-
  • (E)-Oleic acid
  • 9-octadecenoic acid, (9E)-
  • trans-Octadec-9-enoic acid
  • (E)-9-Octadecenoic acid
  • trans-Elaidic acid
  • Elaidinsaure
  • acide elaidique
  • (9E)-Octadecenoic acid
  • 9-trans-Octadecenoic acid
  • Elaidinic acid
  • D9-trans-Octadecenoic acid
  • trans-D9-Octadecenoic acid
  • 9-octadecaenoic Acid
  • Fatty Acid 18:1 n-9 trans
  • (9E)-octadec-9-enoic acid
  • 9-elaidic acid
  • 9-octadecenoicacid
  • Elaidinsaeure
  • trans-delta9-Octadecenoic acid
  • 9E-octadecenoic acid
  • Delta(9)-octadecenoic acid
Show all 37 synonyms
  • trans-delta(sup 9)-Octadecenoic acid
  • trans-Delta(9)-octadecenoic acid
  • C18:1, n-9
  • trans-9-Oleic acid
  • delta9-Octadecenoic acid
  • Delta(9)-octadecenoate
  • oleic_acid
  • OLEIC ACID (9,10-D2)
  • 1lfo
  • 1fe3
  • Elaidic acid, ?99%
  • Elaidic acid (Standard)

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
282.47 g/molcalc.
Exact mass
282.2559 Dacalc.
LogP (octanol/water)
6.11calc.
Topological polar surface area
37.3 Ųcalc.
Hydrogen bond donors
1calc.
Hydrogen bond acceptors
1calc.
Rotatable bonds
15calc.
Heavy atoms
20calc.
Rings
0calc.
Aromatic rings
0calc.
Fraction sp3 carbons
0.83calc.
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

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

Hazard statements

  • H315Causes skin irritation.
  • H319Causes serious eye irritation.
  • H335May cause respiratory irritation.
Precautionary statements (16)
  • P261Avoid breathing dust, fume, gas, mist, vapours or spray.
  • P264Wash skin thoroughly after handling.
  • P264 + P265Wash skin thoroughly after handling. Do not touch eyes.
  • P271Use only outdoors or in a well-ventilated area.
  • P280Wear protective gloves, protective clothing, eye protection and face protection.
  • P302 + P352If on skin: Wash with plenty of water.
  • P304 + P340If inhaled: Remove person to fresh air and keep comfortable for breathing.
  • P305 + P351 + P338If in eyes: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.
  • P319Get medical help if you feel unwell.
  • 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.
  • P403 + P233Store in a well-ventilated place. Keep container tightly closed.
  • 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

Elaidic acid suppliers

Sponsored listings first, then the documented ranking: membership, verification, replies, completeness, freshness and ratings

All 12 suppliers
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Suppliers marked Unclaimed profile have not claimed their profile yet. They are not verified by CompoundList, their offers are price on request and details may have changed, so please confirm them with the supplier. Company representatives can claim a profile with a business email on the company's own website domain. Our team verifies each claim and sends the result by email.

Where suppliers are based

12 suppliers in 3 countries

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Elaidic acid price

Indicative price range per kg from live supplier offers

No published prices right now

Suppliers quote this chemical on request. Send one free request and compare quotes side by side.

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Uses and applications

What the substance is used for, by industry and function

Roles

  • food component
  • physiological role

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 Elaidic acid is traded under.

HS 2916.15Indicative HS code

Oleic, linoleic or linolenic acids, their salts and esters

World exports in 2024
$204M
−5.6% vs 2023, imports $199M
2019 to 2024
Top exporters
  1. Italy20.3%
  2. China14.4%
  3. India * partner reported8.0%
Top importers
  1. Germany18.4%
  2. France * partner reported8.7%
  3. China5.9%

* Partner reported figures, a lower bound.

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

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

Frequently asked questions

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

What is Elaidic acid?

Elaidic acid is a 9-octadecenoic acid and the trans-isomer of oleic acid. It has a role as a food component. It is a conjugate acid of an Octadec-9-enoic acid anion and an elaidate. It derives from a hydride of a trans-octadec-9-ene.

What is the CAS number of Elaidic acid?

The CAS registry number of Elaidic acid is 112-79-8. Other or deprecated CAS numbers: 112-80-1, 2027-47-6.

What is the molecular formula and weight of Elaidic acid?

The molecular formula of Elaidic acid is C18H34O2 and its molar mass is 282.47 g/mol.

What is Elaidic acid used for?

Known uses and roles of Elaidic acid include food component and physiological role.

Is Elaidic acid hazardous?

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

What is the HS code of Elaidic acid?

Elaidic acid is usually classified under HS code 291615 (Oleic, linoleic or linolenic acids, their salts and esters). This is indicative, confirm it with your customs broker before shipping.

Where can I buy Elaidic acid?

CompoundList lists 12 suppliers of Elaidic acid in United States, China and Singapore. Send one free request to get and compare quotes. Your contact details stay private until you accept a quote.

What is the price of Elaidic acid?

Suppliers quote Elaidic 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 Elaidic 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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