Overview
2-Methylaminoethanol is an organic compound belonging to the amino alcohol family, characterized by both hydroxyl and amino functional groups. Industrially produced through the reaction of ethylene oxide with methylamine, this versatile chemical serves as a building block for numerous derivatives. Its bifunctional nature allows participation in both esterification and alkylation reactions. As a specialty chemical, it finds significant use in pharmaceutical synthesis where it acts as a precursor for local anesthetics and antihistamines. The compound's ability to form stable complexes with metal ions also makes it valuable in corrosion inhibition formulations, particularly in boiler water treatment systems.
Physical and Chemical Properties
This liquid amine exhibits typical amino alcohol characteristics with a viscosity similar to water (approximately 5.9 mPa·s at 20°C) and a distinct ammonia-like odor. Its pKa of 9.6 indicates moderate basicity, enabling neutralization reactions with acids to form stable salts. The compound's miscibility with polar solvents stems from hydrogen bonding capacity via both functional groups. Thermal stability extends to approximately 200°C before decomposition begins. The substance shows hygroscopic tendencies, requiring moisture control during storage. Its vapor pressure of 1.3 mmHg at 20°C suggests moderate volatility, necessitating closed-system handling to prevent workplace exposure.
Main Applications
In pharmaceutical manufacturing, 2-methylaminoethanol serves as a key intermediate for producing mephenesin-type muscle relaxants and various anticholinergic drugs. The agrochemical industry utilizes it in synthesizing certain herbicides and plant growth regulators where its amino group facilitates active ingredient formation. Industrial applications include gas treatment processes where it absorbs acidic components like CO2 and H2S. As a corrosion inhibitor, it forms protective films on metal surfaces, particularly effective in closed-loop water systems. Emerging uses include electrolyte additives for lithium-ion batteries and crosslinking agents in epoxy resin formulations.
Safety and Storage
Classified as corrosive (Skin Corr. 1B) under GHS, this compound requires chemical-resistant gloves (nitrile or neoprene) and face protection during handling. Secondary containment is recommended for storage due to potential tank corrosion over time. Incompatible with strong oxidizers, acids, and acid chlorides - separate storage is essential. Optimal storage temperatures range between 15-25°C in nitrogen-sparged containers to prevent oxidative degradation. Shelf life typically exceeds two years when properly sealed. Spill management requires neutralization with dilute acetic acid before absorption with inert material. Firefighting should utilize alcohol-resistant foam due to water miscibility.
B2B Procurement Guide
Industrial buyers should specify technical grade (98% min purity) or pharmaceutical grade (99.5%+) depending on application needs. Bulk shipments (IBC totes or tank trucks) offer 10-15% cost savings versus drum quantities. Key quality parameters include color (APHA ≤50), water content (≤0.5%), and absence of methylamine impurities. Supply chain considerations include verifying manufacturer compliance with ISO 9001 and Responsible Care® standards. Just-in-time procurement is advisable due to shelf life considerations. Asian suppliers typically offer more competitive pricing but may require longer lead times. Always request Material Safety Data Sheets (MSDS) and Certificate of Analysis (CoA) with shipments.
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