Methylene Chloride (Dichloromethane)

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Chemical Formula:  CH₂Cl₂
Molecular Weight:  84.93 g/mol
CAS Number:  75-09-2
Appearance:  Colorless liquid
Odor:  Mild, sweet
Purity:  ≥99.9%
Boiling Point:  39.6°C (103.3°F)
Melting Point:  -96.7°C (-142.1°F)
Density:  1.33 g/cm³ at 25°C
Vapor Pressure:  352 mm Hg at 20°C
Flash Point:  Non-flammable
Solubility in Water:  13 g/L at 20°C (slightly soluble)
Solubility:  Miscible with alcohols, ethers, and most organic solvents
Specific Gravity:  1.325 – 1.329
Evaporation Rate:  27.5 (relative to butyl acetate = 1)
Refractive Index:  1.424 at 20°C
Surface Tension:  27.2 mN/m at 20°C
Autoignition Temperature:  556°C (1032.8°F)
Heat of Vaporization:  28.6 kJ/mol
Dielectric Constant:  9.08 at 25°C
pH:  Neutral in water

 

Documents: Safety Data Sheet

Description

Methylene Chloride, also known as Dichloromethane, is a colorless, volatile liquid with a mildly sweet odor. It is an effective solvent widely used across various industries due to its high solvency, low flammability, and quick evaporation rate. Methylene Chloride is commonly employed in paint stripping, degreasing, pharmaceutical production, and chemical processing.

Applications:

1. Paint and Coating Removal

  • Paint Stripper: Methylene Chloride is a primary ingredient in paint strippers for removing coatings like paint, varnish, and lacquers from wood, metal, and other surfaces.
  • Graffiti Removal: Its quick evaporation rate and powerful solvency make it ideal for dissolving and lifting graffiti from walls and other hard surfaces.

2. Industrial Cleaning and Degreasing

  • Degreasing Agent: It is effective at removing oils, grease, and other contaminants from machine parts, equipment, and tools in industries such as aerospace, automotive, and heavy manufacturing.
  • Cold Cleaning Applications: Ideal for applications requiring cleaning at room temperatures, as it works well without heating.

3. Pharmaceutical and Chemical Manufacturing

  • Extraction and Purification: Used to extract active ingredients, especially in the production of antibiotics, vitamins, and steroids.
  • Chemical Synthesis: Acts as a reaction and separation medium in the synthesis of organic compounds and intermediates.
  • Decaffeination of Coffee and Tea: Historically used as a solvent in the decaffeination process for coffee beans and tea leaves, although now limited to specific applications.

4. Adhesive Formulation and Removal

  • Adhesive Remover: Utilized for dissolving and removing adhesives and bonding agents in manufacturing and assembly.
  • Formulation of Adhesives and Sealants: Its solvency power makes it valuable in the production of certain adhesives, especially those for industrial applications.

5. Electronics Industry

  • Electronics Cleaning: Used in the cleaning of electronic components due to its non-flammable properties and effectiveness in removing residues and contaminants.

6. Aerospace and Automotive Industries

  • Surface Preparation and Cleaning: Methylene Chloride is used in surface cleaning, stripping, and degreasing, which is critical for preparing parts for further processing or assembly.
  • Chemical Milling and Etching: Employed in metal treatment processes like chemical milling, which is used to create precise, intricate parts for aircraft and automotive components.

7. Laboratory and Analytical Applications

  • Laboratory Solvent: Frequently used in laboratories as a solvent for extraction, purification, and separation processes.
  • HPLC and GC Preparation: Employed as a solvent in sample preparation for high-performance liquid chromatography (HPLC) and gas chromatography (GC).

8. Polymer and Plastic Processing

  • Foam Manufacturing: Used in the production of polyurethane foams for the furniture and automotive industries.
  • Plastic Welding and Solvent Bonding: Methylene Chloride can dissolve certain plastics, making it ideal for solvent welding and creating bonds in plastic parts.

 

Storage & Handling:

Store in a cool, dry, and well-ventilated area. Keep containers tightly closed when not in use. Avoid direct sunlight, heat sources, and any incompatible materials, including strong oxidizers. Ensure proper handling with protective equipment in well-ventilated areas.

Safety Information:

Methylene Chloride is classified as a hazardous substance and should be handled with care. It is advised to use appropriate personal protective equipment (PPE), including gloves, safety goggles, and respiratory protection, to prevent exposure. Always refer to the Safety Data Sheet (SDS) before use.

Regulatory Information:

Complies with EPA, OSHA, and relevant local regulations. Methylene Chloride is restricted for consumer use in certain regions; consult local regulations for more information.

 

Warning:

GHS07: Exclamation mark

GHS Pictogram Label - Health Hazards

Causes Skin Irritation,

Causes serious eye irritation.

How to Comply with Updated California Prop 65 Label Requirements - Master Tape & Label Printers

California Prop. 65 Components:

Warning! This product contain chemicals known to State of California to cause cancer.

Additional information

Size

500mL (16 Fl Oz), 1000mL (32 Fl Oz), 1 Gallon (128 Fl Oz)