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Updated: 2026-07-22

Overview

1,8-Diaminooctane, also known as octamethylenediamine, is an organic compound belonging to the diaminoalkane family. It is widely used in industrial chemistry due to its bifunctional amine groups, which enable it to participate in polymerization reactions and other chemical syntheses. This compound is particularly valued for its role in producing nylon and other polyamides, where it serves as a monomer. Its aliphatic structure contributes to the flexibility and durability of the resulting polymers, making it a preferred choice in material science.

Physical and Chemical Properties

1,8-Diaminooctane is a colorless to pale yellow liquid at room temperature with a characteristic amine odor. It has a molecular weight of 144.26 g/mol and a density of 0.89 g/cm³. The compound is soluble in water, alcohol, and ether, facilitating its use in various solvent-based applications. Its melting point ranges between 50-52°C, and it boils at 225-227°C. The bifunctional nature of the molecule allows it to react with acids, esters, and other electrophiles, making it versatile in synthetic chemistry. However, it is sensitive to moisture and oxidizing agents, requiring careful handling.

Main Applications

1,8-Diaminooctane is primarily used in the production of polymers, including nylon and other polyamides. Its ability to form strong, flexible chains makes it ideal for manufacturing fibers, films, and engineering plastics. Beyond polymers, it serves as a precursor for corrosion inhibitors and surfactants. In the pharmaceutical and agrochemical industries, it is employed as an intermediate in the synthesis of active ingredients. Its versatility and reactivity ensure its widespread use across multiple sectors.

Safety and Storage

1,8-Diaminooctane is corrosive and can cause severe skin and eye irritation upon contact. Inhalation or ingestion may lead to respiratory and digestive tract irritation. Proper personal protective equipment (PPE), including gloves and goggles, is essential when handling this compound. Storage should be in cool, dry conditions, away from moisture and oxidizing agents. Containers must be tightly sealed to prevent contamination and degradation. Spills should be neutralized with appropriate absorbents and disposed of in accordance with local regulations.

B2B Procurement Guide

When procuring 1,8-Diaminooctane, prioritize suppliers who provide certificates of analysis (CoA) to verify purity (typically ≥98%). Moisture content should be minimal to prevent reactivity issues during storage and use. Bulk purchases may offer cost advantages, but ensure proper storage facilities are available. Compliance with safety and environmental regulations is critical, so verify supplier adherence to international standards such as REACH or OSHA guidelines.