What is Octadecenedioic Acid CAS 20701-68-2?

Octadecenedioic Acid CAS 20701-68-2 is a bio-based C18 unsaturated dicarboxylic acid, also known as cis-9-octadecenedioic acid or octadec-9-ene-1,18-dioic acid. Its molecular formula is C18H32O4 and its INCI name is OCTADECENEDIOIC ACID.

Can cosmetic grade and polymer grade Octadecenedioic Acid be used interchangeably?

Not automatically. Cosmetic grade prioritizes purity, assay, heavy-metal limits, and ingredient documentation, while polymer grade may be specified around acid value, color, moisture, and reactivity for resin synthesis.

What key specifications should formulators check for cosmetic use?

Common checks include appearance, assay of at least 98%, acid value, melting point, loss on drying, residue on ignition, and heavy metals. Batch-specific documentation should match the intended formulation and market requirements.

What industrial uses benefit from the C18 unsaturated diacid structure?

It is used as a renewable monomer or modifier in polyesters, polyamides, alkyd resins, adhesives, and powder-coating systems. The long C18 chain and cis double bond can improve flexibility, low-temperature behavior, and hydrophobic compatibility.

Octadecenedioic Acid CAS 20701-68-2

Octadecenedioic Acid, CAS 20701-68-2, is a bio-based C18 unsaturated dicarboxylic acid supplied for skin brightening, sebum-related cosmetic care, polyesters, polyamides, alkyd resins, adhesives and powder coatings. Confirm the required purity and grade, then request a quotation with COA/TDS/SDS for bulk supply.

CAS: 20701-68-2
Synonyms: Octadec-9-ene-1,18-dioic acid, 9-Octadecenedioic acid, cis-9-Octadecenedioic acid, (9Z)-Octadecenedioic acid, C18:1 Dioic Acid
Einecs: 422-260-8
Molecular Formula: C₁₈H₃₂O₄
Grade: Cosmetic Grade
Package: 1kg Aluminum Foil Bag / 25kg Fiber Drum

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Product Description

Octadecenedioic Acid, CAS 20701-68-2, is a bio-based C18 unsaturated dicarboxylic acid.

Synonyms: Octadec-9-ene-1,18-dioic acid; 9-Octadecenedioic acid; cis-9-Octadecenedioic acid; (9Z)-Octadecenedioic acid; C18:1 Dioic Acid.

CAS: 20701-68-2.

Its molecular formula is C18H32O4 and its INCI name is OCTADECENEDIOIC ACID.

It is a white to off-white crystalline powder with a slight characteristic odor.

It has an assay of not less than 98.0%, an acid value of 350–370 mg KOH/g and a melting point of about 85–95 °C.

It is soluble in ethanol, glycols such as butylene glycol and oils, and insoluble in water.

It is studied in cosmetics for skin brightening, conditioning and sebum-related care through PPAR-related pathways.

It is used in skin-brightening serums, spot correctors and whitening creams.

It is used in anti-acne preparations to help control sebum and reduce acne-related bacteria.

It is used as a renewable monomer or modifier in polyesters, polyamides and alkyd resins.

It is used in adhesives and powder-coating systems where the long C18 chain and cis double bond improve flexibility.

It should be described as a cosmetic ingredient rather than as a medical treatment.

Confirm appearance, assay, acid value, melting point, loss on drying, residue on ignition, heavy metals, arsenic, solubility and bacterial count.

Store in a cool, dry place below 25 °C, away from direct sunlight and strong light sources.

Keep the inner bag tightly sealed to prevent oxidation and moisture absorption.

Confirm packaging with the requested quantity and destination requirements.

The page is an RFQ entry point and does not state stock, price, MOQ or fixed lead time.

For an RFQ, state the intended use, required purity and grade, quantity, packaging, destination and document needs.

FAQ - Technical & Supply Chain

Q:
What is Octadecenedioic Acid CAS 20701-68-2?

A: Octadecenedioic Acid CAS 20701-68-2 is a bio-based C18 unsaturated dicarboxylic acid, also known as cis-9-octadecenedioic acid or octadec-9-ene-1,18-dioic acid. Its molecular formula is C18H32O4 and its INCI name is OCTADECENEDIOIC ACID.
Q:
How does it compare with azelaic acid in skin-brightening applications?

A: It is structurally related to azelaic acid and is studied in cosmetics for skin brightening, conditioning, and sebum-related care through PPAR-related pathways. It should be described as a cosmetic ingredient rather than as a medical treatment.
Q:
Can cosmetic grade and polymer grade Octadecenedioic Acid be used interchangeably?

A: Not automatically. Cosmetic grade prioritizes purity, assay, heavy-metal limits, and ingredient documentation, while polymer grade may be specified around acid value, color, moisture, and reactivity for resin synthesis.
Q:
What key specifications should formulators check for cosmetic use?

A: Common checks include appearance, assay of at least 98%, acid value, melting point, loss on drying, residue on ignition, and heavy metals. Batch-specific documentation should match the intended formulation and market requirements.
Q:
What industrial uses benefit from the C18 unsaturated diacid structure?

A: It is used as a renewable monomer or modifier in polyesters, polyamides, alkyd resins, adhesives, and powder-coating systems. The long C18 chain and cis double bond can improve flexibility, low-temperature behavior, and hydrophobic compatibility.

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