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2 octanol


2-Octanol, also known as octan-2-ol or sec-octyl alcohol, is a chemical compound with the molecular formula C8H18O. It is a secondary alcohol that consists of an octyl (8-carbon) chain with a hydroxyl (-OH) group attached to the second carbon atom.

CAS NO.: 123-96-6 

Molecular formula: C8H18O

Molecular weight: 130.23 (according to the Standard Atomic Weights 1987)

Di-sec-octyl phthalate is prepared by the reaction of 2-Octanol and phthalic anhydride. 

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Introduction of 2-Octanol

2-Octanol finds applications in various industries. It is utilized as an ingredient in the flavor and fragrance industry, a starting material for chemical synthesis, a solvent in industrial processes, an extraction agent, and in research laboratories. Its pleasant odor, solubility properties, and selective extraction capabilities make it valuable in these applications.

Structure of 2-Octanol



Molecular formula


Molecular weight

130.23 (according to the Standard Atomic Weights 1987)

Molecular structure diagram:

2-Octanol of Molecular Structure Diagram

Properties: This product is colorless transparent liquid, and can be mixed with a variety of organic solvents.

Packing: Tank wagon, 160 kg/galvanized iron drum.

Storage: Strictly forbidding mixed loading and transportation with oxidants, acids and edible chemicals. Stored in dry, ventilated, rain-proof and sunlight-proof places, away from fire sources and open flames. Transport as inflammable material.

Applications of 2-Octanol


Chemical synthesis: It serves as a starting material or intermediate in the synthesis of various chemicals. 2-Octanol can undergo reactions to produce esters, ethers, and other derivatives used in industries like pharmaceuticals, plastics, and coatings. Di-sec-octyl phthalate is prepared by the reaction of 2-Octanol and phthalic anhydride. It is a plasticizer commonly used in PVC, and also used as synthetic fiber spinning finish and defoaming agent.


Flavor and fragrance industry: 2-Octanol is employed as an ingredient in the production of flavors and fragrances. It contributes fruity, floral, or green notes to perfumes, colognes, and scented products.


Solvent: 2-Octanol is utilized as a solvent in different processes. It can dissolve organic compounds, oils, or resins, making it valuable in industrial applications where solubility is crucial.


Research and laboratory applications: 2-Octanol finds use in research laboratories as a solvent for experiments, extractions, or purifications. Its solubility characteristics and low toxicity make it suitable for various applications. Used as a pharmaceutical raw material, and a raw material to synthesize anthelmintic drug 4-Hexylresorcinol.


Extraction agent: In certain extraction processes, 2-Octanol is used as an extraction agent to separate or recover specific compounds from raw materials. Its selective extraction properties make it useful in applications requiring purification or isolation of target substances.

Specifications of 2-Octanol


Quality Index

Test Method

Density (20℃)kg/m3



Boiling Point ℃


Flash Point (open cup method) ℃


GB/T 261

Viscosity (cp) 25℃ mm2/s


Refractive Index (Nd20)


Chroma (Pt-Co Color Number)



FAQS about 2-Octanol

Is 2-Octanol Safe to Handle?

 2-Octanol is generally considered safe when handled properly. However, it is important to follow appropriate safety precautions and guidelines, including using personal protective equipment and ensuring proper ventilation, as with any chemical substance.

What Is the Difference Between Octanol and 2-Octanol?

The main difference between octanol and 2-octanol lies in their chemical structures and properties.

Octanol, also known as octan-1-ol or 1-octanol, is a primary alcohol with a hydroxyl group (-OH) attached to the first carbon atom of an eight-carbon chain. It has the molecular formula C8H18O.

On the other hand, 2-octanol, also known as octan-2-ol or sec-octyl alcohol, is a secondary alcohol with a hydroxyl group attached to the second carbon atom of an eight-carbon chain. Its molecular formula is also C8H18O.

The key difference is the position of the hydroxyl group within the carbon chain. In octanol, the hydroxyl group is attached to the first carbon, while in 2-octanol, it is attached to the second carbon. This difference in structure can result in variations in chemical reactivity and physical properties.

These subtle structural differences can influence their behaviors and applications. For instance, they may have different solubilities, boiling points, and reactivity in chemical reactions. It is important to consider these distinctions when using them in specific applications or processes.