Methyl Ethyl Ketone (MEK) – High-Purity Solvent

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Chemical Identity

  • Chemical Name: Methyl Ethyl Ketone (MEK)
  • IUPAC Name: Butan-2-one
  • CAS Number: 78-93-3
  • Molecular Formula: C₄H₈O
  • Molecular Weight: 72.11 g/mol
  • EINECS Number: 201-159-0

Physical Properties

  • Appearance: Clear, colorless liquid
  • Odor: Sweet, pungent odor similar to acetone
  • Boiling Point: 79.6°C (175.3°F)
  • Melting Point: -86°C (-123°F)
  • Density: 0.805 g/cm³ at 20°C
  • Refractive Index: 1.378 at 20°C
  • Flash Point: 11°C (52°F), closed cup
  • Vapor Pressure: 88 mmHg at 20°C
  • Solubility:
    • Water: Miscible
    • Organic Solvents: Miscible with most organic solvents like ethanol, acetone, ether, and chloroform

Chemical Properties

  • Purity: ≥ 99% (typically for industrial-grade)
  • Stability: Stable under normal conditions; avoid contact with strong oxidizing agents, acids, and bases.
  • Reactivity: Reacts with strong acids, bases, and oxidizers.
  • Functional Group: Ketone (C=O)

Description

Methyl Ethyl Ketone (MEK) is a highly versatile, fast-evaporating solvent widely used in various industrial, chemical, and laboratory applications. Known for its excellent solvency power, MEK effectively dissolves a wide range of resins, polymers, and other substances, making it a key ingredient in products such as paints, coatings, adhesives, and inks.

Applications of Methyl Ethyl Ketone (MEK)

Industrial Solvent

  • Paints, Coatings, and Varnishes: Improves drying time and finish quality.
  • Adhesives: Enhances bonding for plastics, rubber, and metals.

Pharmaceutical Industry

  • Solvent for Drug Formulations: Used in the production of active pharmaceutical ingredients (APIs).
  • Extraction and Purification: Helps in extracting and purifying compounds.

Chemical Manufacturing

  • Chemical Synthesis: Used to produce chemicals like butanone oxime.
  • Extraction: Employed in food, fragrance, and flavor extraction.

Laboratory and Research

  • Solvent: Used in chemical reactions and extractions in research labs.

Cleaning and Degreasing

  • Metal and Machinery Cleaning: Removes oils and residues in industrial settings.
  • Electronics: Cleans circuit boards and components.

Printing and Textile

  • Ink Manufacturing: Key solvent for printing inks.
  • Textile: Used for cleaning and purifying fabrics.

Environmental Testing

  • Pollution Control: Detects and removes contaminants from environmental samples.

Storage Guidelines

  • Temperature:
    • Store in a cool, dry, well-ventilated area, away from heat sources and direct sunlight.
    • Recommended storage temperature: 15°C to 25°C (59°F to 77°F).
    • Avoid storing MEK in freezing or excessively high-temperature environments.
  • Containers:
    • Keep in tightly sealed containers made of compatible materials such as glass or HDPE (high-density polyethylene).
    • Ensure that containers are properly labeled to prevent misuse.
  • Environment:
    • Store away from ignition sources such as open flames, sparks, or static electricity.
    • Keep away from strong oxidizing agents, acids, and bases to prevent hazardous reactions.
  • Shelf Life:
    • MEK is stable for long periods if stored correctly. Refer to packaging for specific expiration dates.

Handling Guidelines

  • Personal Protective Equipment (PPE):
    • Gloves: Wear chemical-resistant gloves (e.g., nitrile or neoprene) to prevent skin contact.
    • Eye Protection: Use safety goggles or a face shield to protect eyes from splashes or vapors.
    • Clothing: Wear a lab coat or other protective clothing to prevent skin exposure.
    • Respiratory Protection: Use a respirator or dust mask in poorly ventilated areas or if handling large quantities.
  • Work Area:
    • Handle MEK in a well-ventilated area or under a fume hood to avoid inhalation of vapors.
    • Keep the work area clean, organized, and free of non-laboratory items to prevent accidental contamination or exposure.
  • Precautions:
    • Avoid ingestion, inhalation, and skin contact with MEK.
    • Ensure that all containers are tightly sealed when not in use to minimize evaporation and exposure to the air.
    • Use non-sparking tools and equipment when handling MEK to avoid ignition risks.
  • First Aid Measures:
    • Inhalation: Move to fresh air immediately. Seek medical attention if symptoms persist.
    • Skin Contact: Wash with soap and water immediately. Remove contaminated clothing.
    • Eye Contact: Rinse immediately with plenty of water for at least 15 minutes. Seek medical attention if irritation persists.
    • Ingestion: Do not induce vomiting. Rinse mouth and seek immediate medical attention.

Spill and Leak Procedures

  • Spill Response:
    • Evacuate the area immediately and remove all ignition sources.
    • Use absorbent materials (e.g., sand, vermiculite) to contain and clean up spills.
    • Dispose of the spilled material and waste according to local regulations.

Disposal

  • Dispose of MEK according to local, regional, and national regulations.
  • Use licensed chemical waste disposal services to properly dispose of containers and residues.