Octyl Pyrrolidone, N-Octyl-2-pyrrolidone, 1-Octyl-2-pyrrolidone, N-Octylpyrrolidone, N-Octylbutyrolactam, NOP, 2687-94-7

Octyl Pyrrolidone, N-Octyl-2-pyrrolidone, 1-Octyl-2-pyrrolidone, N-Octylpyrrolidone, N-Octylbutyrolactam, NOP, 2687-94-7

N-Octyl-2-pyrrolidone (CAS 2687-94-7):

🌟 N-Octyl-2-pyrrolidone (NOP)

A) Physical and Chemical Properties

• Chemical Formula: C₁₂H₂₃NO

• Molecular Weight: 197.32 g/mol

• Appearance: Clear to slightly yellow liquid

• Melting Point: ~−25 °C

• Boiling Point: 170–172 °C @ 15 mmHg

• Density: ~0.92 g/cm³ (25 °C)

• Solubility: Sparingly soluble in water (~1.2 g/L @ 20 °C); miscible with organic solvents

• Refractive Index: n₂₀/D 1.465

• Vapor Pressure: 0.03–0.08 Pa @ 20 °C

• Flash Point: ~110 °C (closed cup)

• WGK (Germany): 2 (moderate water hazard)

• EC Number: 403-700-8

• HS Code: 2933.99.00

B) Applications

• Cleaning Products: Low-foam surfactant and solubilizer

• Agrochemicals: Co-solvent and carrier in pesticide formulations

• Printing & Inks: Wetting agent in offset ink systems

• Rubber & Fillers: Pigment and silica dispersion aid

• Veterinary Pharmaceuticals: Carrier in injection formulations

• Metal Cleaning: Surface-active solvent for degreasing systems

C) Manufacturing Process

• Main Route: 2-Pyrrolidone + 1-Bromooctane → N-Octyl-2-pyrrolidone

• Catalyst: Phase transfer catalyst (e.g., tetrabutylammonium bromide)

• Temperature: ~90 °C

• Duration: ~10 hours

• Purity: ≥98% (confirmed by GC)

D) Chemical Reactions

• N-Alkylation: Synthesis of pyrrolidone derivatives

• Solvation: Effective for both polar and non-polar molecules

• Surfactant Behavior: Low-foam profile with strong dispersion effect

E) Alternatives

• N-Methyl-2-pyrrolidone (NMP): More polar and water-soluble

• 1-Dodecyl-2-pyrrolidone: More hydrophobic chain variant

• Propylene Carbonate: Safer aprotic solvent alternative

• 2-Pyrrolidone: Core precursor to NOP

F) Synonyms N-Octyl-2-pyrrolidone, 1-Octyl-2-pyrrolidone, N-Octylpyrrolidone, N-Octylbutyrolactam

G) Common Trade Names “Low-foam pyrrolidone solvent” “Agricultural adjuvant” “NOP solvent”

H) Usage Ratios

• Cleaning formulations: 1–10%

• Pesticide systems: 5–15% as co-solvent

• Printing & inks: 2–8% as wetting agent