What Is 2-Heptanol and How Is It Used in Industrial Applications?
Technical Introduction
2-Heptanol is a secondary alcohol with the molecular formula C₇H₁₆O, consisting of a seven-carbon chain with a hydroxyl group attached to the second carbon atom.
It appears as a colorless to pale yellow liquid with a mild, pleasant odor. The compound exhibits both hydrophobic and hydrophilic characteristics, making it useful as a solvent, intermediate, and flavor ingredient.
It can be produced via hydrogenation of heptanone, fermentation processes, or petrochemical synthesis.
Applications
1. Solvent in Industrial Processes
Used for paints, coatings, inks, and resins due to good solvency for organic materials.
Suitable for dissolving oils, waxes, and polymers.
2. Chemical Intermediate
Precursor in the synthesis of plasticizers, lubricants, and surfactants.
Used in the preparation of other alcohol derivatives and esters.
3. Flavor and Fragrance Industry
Adds fruity or floral notes in perfumes and cosmetic formulations.
Approved in trace amounts as a food flavoring agent in some regions.
4. Cleaning Formulations
Acts as a degreasing agent in household and industrial cleaners.
Advantages
Balanced Polarity: Can dissolve both polar and nonpolar substances.
Moderate Volatility: Useful where slow evaporation is required.
Good Compatibility: Works with a wide range of organic compounds.
Versatile Use: Applicable in multiple industries from chemicals to cosmetics.
Typical Parameters
| Property | Value |
|---|---|
| Chemical Formula | C₇H₁₆O |
| Molecular Weight | 116.20 g/mol |
| CAS Number | 543-49-7 |
| Appearance | Colorless to pale yellow liquid |
| Purity (%) | ≥98.0 |
| Boiling Point (°C) | 159–161 |
| Flash Point (°C) | ~60 |
| Density (g/cm³ @ 20°C) | 0.821–0.826 |
| Solubility | Slightly soluble in water, miscible with most organic solvents |
| Storage | Store in a cool, ventilated place, away from ignition sources |
| Shelf Life | 24 months (sealed) |
FAQs
Q1: Is 2-Heptanol safe for food use?
A1: It is permitted in trace amounts as a flavoring agent in some countries, but regulations vary.
Q2: Can it be mixed with water?
A2: Only partially; it is more soluble in organic solvents.
Q3: How is it typically produced?
A3: Commonly via catalytic hydrogenation of heptanone or fermentation of biomass-derived precursors.
Q4: Is it flammable?
A4: Yes, it is combustible and should be stored away from heat and open flames.
Q5: Can it be used in cosmetics?
A5: Yes, especially in fragrance formulations, but usage levels must comply with cosmetic safety standards.
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