CAS 124-09-4 corresponds to 1,6-Hexamethylenediamine, a key aliphatic diamine primarily used as the core monomer of nylon 66 and as a curing agent for epoxy resins.

Basic identity information
-Chinese name: 1,6-Hexanediamine (also known as Hexamethylenediamine, 1,6-diaminohexane)
-English name: 1,6-Hexanediamine/Hexamethylenediamine (HMDA)
-Molecular formula: C ₆ H ₁₆ N ₂; Molecular weight: 116.21
-Structural formula: H ₂ N (CH ₂) ₆ NH ₂
-EINECS number: 204-679-6

Main physical and chemical properties
-Appearance: White flaky crystals or powder with a distinct ammonia odor
-Melting point: 42-45 ℃; Boiling point: 204-205 ℃
-Density: approximately 0.89 g/cm ³; Flash point: 81 ℃ (closed cup)
-Solubility: Easy to dissolve in water (about 490 g/L at 20 ℃), soluble in ethanol, slightly soluble in ether and benzene
-Chemical properties: Strong alkalinity, easily absorbs CO ₂ and water from the air, can form salts with acids, and participates in acylation and alkylation reactions.

Core application areas
1. Polymer synthesis: most of them are used to produce nylon 66 (polycondensation with adipic acid), nylon 610, polyurethane foam, and ion exchange resin
2. Curing agent: widely used as a curing agent for epoxy resins, urea formaldehyde resins, and organic crosslinking agents
3. Other uses: textile and paper stabilizer, aluminum alloy corrosion inhibitor, chloroprene rubber emulsifier, pharmaceutical intermediate (such as synthetic chlorhexidine precursor)

Safety and Storage Tips
-Hazard category: Corrosive substances (alkaline corrosion), irritant to respiratory tract and skin, inhalation of high concentrations can cause headaches and even blindness
-Acute toxicity: Rat oral LD ₅₀ about 750 mg/kg
-Storage requirements: Sealed and stored in a cool and ventilated place (≤ 30 ℃), away from sources of fire, oxidants, and acids, equipped with leak prevention facilities
-Protective advice: Wear protective goggles, gloves, and protective clothing during operation to avoid inhaling dust or coming into contact with eyes.

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1,6-Hexanediamine CAS 124-09-4
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