CAS 1888-91-1 corresponds to N-acetyl caprolactam, which is a seven membered cyclic amide organic compound with the molecular formula C ₈ H ₁ ∝ NO ₂ and a molecular weight of 155.19. It is mainly used as an organic synthesis and pharmaceutical intermediate, especially as a catalyst/promoter in the anionic polymerization of caprolactam.

Basic Information
-Chinese name: N-acetyl caprolactam
-English name: N-Acetylcaprolactam (alias: 1-Acetylhexanehydro-2H-azepin-2-one, N-acetyl – ε – caprolactam)
-Molecular formula: C ₈ H ₁ ∝ NO ₂; Molecular weight: 155.19 g/mol
- EINECS：217-565-6
-Appearance: Colorless to pale yellow transparent liquid
-Key physical properties: boiling point of approximately 134-135 ° C (26 mmHg), density of approximately 1.09 g/mL (25 ° C), flash point of approximately 122 ° C (closed cup), refractive index n ² ⁰/D ≈ 1.489
-Solubility: Easily soluble in common organic solvents, stable at room temperature, and not easily hygroscopic

main purpose
1. Aggregation additive: As a catalyst/promoter for the anionic polymerization of caprolactam, it can accelerate the polymerization rate and enhance the impact strength of the polymer
2. Synthesis intermediates: Organic synthesis pathways widely used for modification of pharmaceuticals, pesticides, and polymer materials
3. Other applications: It has been reported that it can be used as a bleaching agent for fabrics and other fine chemical scenarios

Safety and Storage
-Hazard warning: Harmful if swallowed (R22), irritating to eyes (R36), and slightly harmful to water bodies
-Protection requirements: Avoid contact with eyes/skin and maintain ventilation during operation; If accidentally in the eyes, rinse immediately and seek medical attention
-Storage conditions: Sealed, stored in a cool, dry place, avoiding oxidants; Stable storage can be achieved through regular room temperature storage

Products :

CAS 1888-91-1, N-Acetylcaprolactam (C8H13NO2)
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