Overview
Trimethyl Acetate (TMA) is an organic ester derived from acetic acid, primarily used as a solvent and chemical intermediate. Its low toxicity and favorable evaporation rate make it suitable for coatings, adhesives, and pharmaceutical synthesis. As a VOC-exempt solvent in some regions, TMA is increasingly adopted as an alternative to traditional solvents in eco-friendly formulations. Industrial-grade TMA typically has a purity of ≥98%, while higher grades (≥99.5%) are used in sensitive applications like pharmaceuticals.
Physical and Chemical Properties
TMA is a colorless liquid with a characteristic ester-like odor. Its low melting point (-98°C) and moderate boiling point (98-100°C) facilitate easy handling in liquid form at room temperature. The compound's density (0.93 g/cm³) is lighter than water. Chemically, TMA exhibits typical ester reactivity, including hydrolysis under acidic/alkaline conditions and transesterification. Its volatility (vapor pressure ~40 mmHg at 20°C) requires careful storage to prevent evaporation and flammability risks (flash point ~12°C).
Main Applications
In coatings and inks, TMA serves as a fast-evaporating solvent for cellulose nitrate and acrylic resins, improving flow and leveling. The pharmaceutical industry uses it as an intermediate in synthesizing active ingredients and excipients. TMA also functions as a flavoring agent (apple/pear notes) in food products at low concentrations (typically <0.1%). Emerging applications include electrolyte additives for lithium-ion batteries and reaction media for specialty chemical synthesis.
Safety and Storage
As a flammable liquid (NFPA Class IB), TMA requires storage in approved safety cans or drums with flame arrestors. Grounding and bonding are essential during transfer to prevent static discharge. Storage areas should maintain temperatures below 30°C. Personal protective equipment (PPE) including chemical goggles, gloves (nitrile recommended), and vapor respirators (for prolonged exposure) must be used. Spills should be contained with absorbent materials like vermiculite, never washed into drains due to aquatic toxicity concerns.
B2B Procurement Guide
Industrial buyers should prioritize suppliers with ISO 9001 certification and batch-specific COAs (Certificates of Analysis). Key specifications include purity (≥98% for most industrial uses), water content (<0.1%), and acid value (<0.05 mg KOH/g). Bulk procurement (200kg drums or isotanks) typically offers 15-30% cost savings versus small packaging. Just-in-time delivery is recommended due to TMA's shelf life of ~2 years under proper storage. Regional regulations (e.g., REACH, TSCA) compliance documentation should be verified for international shipments.
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