n-acetylcaprolactam

CAS Number
1888-91-1
EC Number
217-565-6

What is n-acetylcaprolactam?

N-Acetylcaprolactam (CAS 1888-91-1) is a cyclic amide derivative used primarily as an activator and initiator in anionic polymerization processes.

Where is n-acetylcaprolactam used?

  • Polymer manufacturing: accelerates conversion of caprolactam monomer into nylon
  • Activator in anionic ring-opening polymerization of caprolactam to produce polyamide 6 (PA6)
  • Reaction injection molding and cast nylon processes requiring rapid polymerization at moderate temperatures
  • Textile fiber production: supports manufacture of PA6 yarns and technical fibers
  • Leather finishing and paper treatment: polyamide intermediates from activated polymerization systems
  • It also functions as a building block in specialty heterocyclic synthesis.

Commercial specifications

  • Technical grade, purity commonly 98% or higher
  • Drum and IBC quantities; packaging scales from laboratory to bulk supply

Other Names (Synonyms)

1-Acetylhexahydro-2H-azepin-2-one|2H-AZEPIN-2-ONE, 1-ACETYLHEXAHYDRO-|N-Acetyl-6-caprolactam|N-Acetyl-epsilon-caprolactam|N-Acetylhexanelactam|Acetylkaprolaktam [Czech]

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What are the physical properties of n-acetylcaprolactam?

Boiling Point 108 °C (approx) @ Press: 12 Torr
Density 1.1335 g/cm³ @ Temp: 25 °C
Flash Point >230 °F
Appearance colourless liquid
Color Colorless to Light yellow
Form clear liquid
Water Solubility 81.7g/L at 20℃
Vapor Pressure 2.71Pa at 20℃
Refractive Index n 20/D 1.489(lit.)
Log P 0.95 at 23℃

How is n-acetylcaprolactam classified and handled safely? Learn More

Warning
GHS07· Irritant

Hazard Statements

H302 Harmful if swallowed
H319 Causes serious eye irritation

Precautionary Statements

P264 Wash … thoroughly after handling.
P270 Do not eat, drink or smoke when using this product.
P280 Wear protective gloves/protective clothing/eye protection/face protection.
P330 Rinse mouth.

Which trade and regulatory codes apply to n-acetylcaprolactam?

HS Code 2933998090
WGK (Germany) 1
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