Methylene Chloride

Product information:

What is Methylene Chloride?

Methylene Chloride (CH₂Cl₂), also known as Dichloromethane (DCM), is a colorless, transparent liquid with an ether-like odor. It is widely used in various industries due to its low toxicity, non-flammability, and excellent solvent properties.

Key Properties of Methylene Chloride

Methylene Chloride is considered one of the most user-friendly solvents due to its unique characteristics:

• Fast evaporation rate
• Low toxicity
• Slight solubility in water but high solubility in organic solvents
• Difficult to ignite (autoignition occurs at 556°C)
• Easily recovered due to its low boiling point and high vapor pressure

Production of Methylene Chloride

Methylene Chloride is produced by reacting Methane (or Methyl Chloride) with Chlorine gas at a temperature of 400 – 500°C.

This reaction results in the formation of multiple chlorinated compounds: Methyl Chloride (CH₃Cl), Methylene Chloride (CH₂Cl₂), Chloroform (CHCl₃), and Carbon Tetrachloride (CCl₄).

Chemical Reactions:

1. CH₄ + Cl₂ → CH₃Cl + HCl
2. CH₃Cl + Cl₂ → CH₂Cl₂ + HCl
3. CH₂Cl₂ + Cl₂ → CHCl₃ + HCl
4. CHCl₃ + Cl₂ → CCl₄ + HCl

After the reaction, distillation is used to separate the different compounds.

Applications of Methylene Chloride

Methylene Chloride is widely used due to its low toxicity and non-flammability. Some of its key applications include:

✅ Paint Stripping
✅ Adhesives & Sealants Production
✅ Plastic Processing & Mold Cleaning
✅ Metal Cleaning & Degreasing
✅ Solvent for Polycarbonate & Acetate Film Manufacturing
✅ Fiberglass Processing
✅ Surface Cleaning
✅ Spray Paints & PU Foam Blowing Agents
✅ Plastic Welding (e.g., used for sealing electronic measuring device casings)
✅ Textile & Garment Printing Industry
✅ Insecticide Sprays & Leather Industry Cleaning
✅ Foam & Polyurethane Production

Storage & Handling Precautions

Methylene Chloride should be stored in a cool, dry, and well-ventilated area. After use, the container must be tightly sealed as the solvent evaporates quickly.

⚠ Health & Safety Concerns

• Harmful to the respiratory system, especially with prolonged exposure
• Irritating to the eyes and skin
• Inhalation can cause dizziness, nausea, fatigue, or even unconsciousness
• Classified as a potential carcinogen and may affect fetal development

✅ Safety Measures When Handling Methylene Chloride

• Wear protective clothing, gloves, and a respirator
• Work in well-ventilated areas
• Keep away from sunlight, heat sources, electrical sparks, and metals
• Store in properly labeled, tightly sealed containers

First Aid Measures for Methylene Chloride Exposure

🚨 If exposed to Methylene Chloride, follow these steps immediately:

🔹 Eye Contact:

• Flush eyes with clean water or saline solution for at least 30 minutes
• Seek medical attention immediately
• Do not apply ointments unless prescribed by a doctor

🔹 Skin Contact:

• Remove contaminated clothing
• Wash affected skin with plenty of water
• Seek medical attention if necessary

🔹 Inhalation:

• Move the person to fresh air immediately
• Call for medical help if breathing difficulties persist