Caprolactam (CAS 105-60-2) is the essential monomer for Nylon 6 production. This white, crystalline solid drives a multi‑billion‑dollar market, with over 5 million tons consumed annually worldwide. Nearly all of it goes into making Nylon 6 fibers, engineering plastics, and films – from carpets and clothing to automotive gears and food packaging.

Quick Properties

Caprolactam is hygroscopic and highly soluble in water, alcohol, and benzene. It has a mild odor and is stable under normal storage.

Main Applications

1. Nylon 6 Fibers (~90% of demand)
Used in textiles, carpets, industrial yarns, ropes, and fishing nets.

2. Nylon 6 Engineering Plastics
Automotive parts (gears, bearings), electrical components, medical devices, and 3D printing filaments.

3. Other Uses
Solvent for polymers, cross‑linker for polyurethanes, and a permitted food‑contact material under EU Regulation 10/2011.

How It’s Made

• Conventional route (90% of production): Cyclohexane → oxidation to cyclohexanone → oxime formation → Beckmann rearrangement to caprolactam.

• Alternative methods: Photonitrosation or nitrosation of cyclohexane derivatives.

• Recycling: Nylon 6 waste (e.g., carpets) can be depolymerised back to caprolactam, supporting a circular economy – recent catalysts achieve >90% yield.

Safety & Handling

• Hazards: Harmful if swallowed/inhaled (H302, H332); causes skin/eye irritation (H315, H319).

• Exposure limit (TWA): 5 mg/m³.

• Not classified as a carcinogen (A5).

• Storage: Keep in a cool, dry place in sealed containers. Use PPE (gloves, goggles, dust mask) and avoid dust formation.

Market & Supply (2026)

• Global market value (2024): ~US$12.6 billion, projected to reach US$19.1 billion by 2031 (CAGR 6.2%).

• Major producers: Sinopec, Shandong Hualu Hengsheng, Tianjin Haili, and other Chinese chemical giants.

• Recent price (East China, bulk): ~11,350–12,400 CNY/ton.

Why Caprolactam?

• Proven, mature technology with reliable supply chains.

• Enables high‑performance materials for diverse industries.

• Increasingly recyclable – aligning with sustainability goals.

• Globally accepted for food‑contact applications.

Conclusion

Caprolactam (CAS 105-60-2) remains the indispensable building block for Nylon 6. With steady demand growth, expanding recycling routes, and a robust global market, it continues to be a cornerstone chemical for the polymer industry.