1-Methylimidazole[3]

Updated: 2026-10-11

Overview

1-Methylimidazole (1-MI) is a heterocyclic organic compound with a five-membered ring containing two nitrogen atoms. It is a foundational chemical in industrial and pharmaceutical applications due to its strong basicity and catalytic properties. The compound is synthesized through methylation of imidazole and is valued for its stability and reactivity. 1-MI is commonly employed as a precursor or intermediate in the production of ionic liquids, pesticides, and specialty polymers. Its ability to act as a ligand or catalyst in chemical reactions makes it indispensable in organic synthesis and material science.

Physical and Chemical Properties

As a liquid at room temperature, 1-Methylimidazole exhibits a density of 1.03 g/cm³ and boils at 198°C. It is highly soluble in water and organic solvents like ethanol and diethyl ether, facilitating its use in diverse formulations. The compound's molecular structure features a reactive imidazole ring, which undergoes electrophilic substitution and deprotonation. Its pKa of ~7.0 classifies it as a strong organic base, useful for neutralizing acids or initiating polymerization reactions. Stability under inert conditions ensures long shelf life when stored properly.

Main Applications

1-MI is a key ingredient in pharmaceuticals, particularly for synthesizing antifungal and antiviral agents. It also serves as a catalyst in polyurethane foam production and the manufacture of ionic liquids for batteries. In agrochemicals, 1-Methylimidazole is used to create herbicides and plant growth regulators. Its role in corrosion inhibitors and epoxy curing agents further underscores its industrial versatility. Emerging applications include carbon capture technologies and conductive polymers.

Safety and Storage

Due to its corrosive nature, 1-MI requires strict handling protocols. Workers must wear gloves, goggles, and respiratory protection to prevent skin/eye contact and inhalation. Spills should be neutralized with weak acids and contained with inert absorbents. Storage mandates sealed containers in cool (<30°C), ventilated areas, separate from oxidizers and acids. Regulatory compliance with OSHA, REACH, and GHS labeling is essential for transportation and workplace safety.

B2B Procurement Guide

When sourcing 1-Methylimidazole, prioritize suppliers with ISO 9001 certification and batch-specific COAs (Certificates of Analysis). Technical-grade (≥98%) and ultra-pure (≥99.5%) variants cater to different industrial needs. Bulk buyers should negotiate contracts with logistics provisions for hazardous material transport. Spot-market prices fluctuate with raw material availability; long-term agreements may stabilize costs. Audit supplier safety practices and environmental policies to ensure regulatory alignment.