N-Oleyl-1,3-propanediamine - CAS 7173-62-8 / Articles

N-Oleyl-1,3-propanediamine (CAS 7173-62-8): Structure and Properties

1. Definition and General Description

N-Oleyl-1,3-propanediamine (CAS 7173-62-8) is a diamine modified with a long unsaturated hydrocarbon chain (oleyl fragment). This structure combines polar amine groups and a hydrophobic moiety with a double bond, providing the compound with specific surface-active and anticorrosive properties.

Synonyms:

Russian: N-Олейл-1,3-пропандиамин, N-(цис-9-Октадеценил)-1,3-пропандиамин
English: Oleyl-1,3-propanediamine, N-(cis-9-Octadecenyl)-1,3-propanediamine
German: N-(cis-9-Octadecenyl)-1,3-Propandiamin

2. Molecular Formula and Chemical Structure

Molecular formula: C₂₁H₄₂N₂

General structural formula: The molecule contains two amine groups at the ends of a propylene bridge and a long olefinic (C18) chain attached to one of the nitrogen atoms.

3. Physicochemical Characteristics

Appearance: Oily liquid with variable shade (from colorless to pale yellow).

Odor: Pronounced amine odor, sometimes pungent.

Density: In the range of 0.85–0.90 g/cm³ (at 20°C).

Boiling point: Above 300°C at atmospheric pressure (vacuum distillation is acceptable).

Melting point: Typically below 0°C, depending on purity.

Flash point: Approximately 150–160°C.

Solubility:

In water: Low, but emulsion formation is possible at certain pH and concentrations.
In organic solvents (alcohols, benzene, hydrocarbons): Better soluble due to the long aliphatic chain.

Decomposition: Heating above boiling temperature or contact with strong oxidizers may release toxic products (nitrogen oxides).

Storage conditions: Recommended storage in tightly sealed containers, avoiding contact with moisture, oxygen, acids, and elevated temperatures.

Stability: Sufficiently stable under normal conditions, retaining its properties over extended periods.

4. Potential Impact and Safety

Irritation: Direct contact with skin and mucous membranes may cause inflammatory reactions, itching, redness, and chemical burns.

Safety precautions: Personal protective equipment (gloves, goggles, protective clothing) should be used when working with the substance. Operations should be performed in a fume hood.

Environmental aspects: Toxicity to aquatic organisms cannot be excluded; therefore, it is important to control wastewater and dispose of waste in accordance with current regulations.

5. Applications

Corrosion inhibitors: Used in petrochemical processes to protect pipelines and metal structures from aggressive environments.

Antistatic additives: In textile production and polymer processing to reduce static electricity buildup.

Lubricants: Improves wettability and adhesion, as well as reduces friction.

Flotation: Used as a cationic collector in ore beneficiation.

Cosmetic industry: In some special formulations as an auxiliary surfactant and emulsifier (subject to safety considerations).

6. Conclusion

N-Oleyl-1,3-propanediamine (CAS 7173-62-8) is a multifunctional compound with pronounced surface-active characteristics and corrosion-protective potential. Proper handling and compliance with safety measures make this substance a valuable component in many industrial processes, including the oil and gas industry, lubricant production, and textile technologies.