Dichloromethane (Methylene Chloride): Uses, Properties & Safety (CAS 75-09-2)
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Dichloromethane (Methylene Chloride): Uses, Properties & Safety (CAS 75-09-2)

May 22, 2026 Author: ChemService
Dichloromethane (Methylene Chloride): Uses, Properties & Safety (CAS 75-09-2)

What is Dichloromethane (Methylene Chloride)?

Dichloromethane, widely known as methylene chloride, is a clear, colorless, and volatile liquid with a moderately sweet aroma. In the industrial world, it is highly valued for its exceptional ability to dissolve a wide range of organic compounds. With the CAS number 75-09-2, this versatile solvent is a staple in various chemical processes, manufacturing, and maintenance applications.

Key Chemical Properties

PropertySpecification
Common NamesDichloromethane, Methylene Chloride
CAS Number75-09-2
Chemical FormulaCH2Cl2
AppearanceColorless liquid
OdorMildly sweet, chloroform-like

Primary Industrial Uses

  • Paint and Varnish Strippers: This is one of its most famous applications. It effectively breaks down paints, varnishes, and coatings from wood and metal surfaces without damaging the underlying material.
  • Chemical Extraction: In the pharmaceutical and food and beverage industries, it is often used as an extraction solvent. (For instance, it has historically been used to decaffeinate coffee and tea).
  • Manufacturing and Chemical Processes: It serves as a reaction solvent in the production of plastics, polyurethanes, and photographic films.
  • Metal Cleaning and Degreasing: Its quick-drying nature makes it ideal for cleaning metal parts in automotive and aerospace manufacturing.

Critical Safety and Handling Guidelines

WARNING: Heavy Vapor Accumulation
Dichloromethane is highly volatile, and its vapors are heavier than air. Vapors can accumulate rapidly in poorly ventilated or low-lying areas.
  1. Strict Ventilation: Never use this chemical in confined spaces. Always operate under a fume hood or in areas with active, high-capacity exhaust ventilation.
  2. Protective Equipment (PPE): Standard rubber gloves are often insufficient. Use gloves specifically rated for dichloromethane (like PVA or Viton), along with safety goggles and a respirator if ventilation is inadequate.
  3. Storage: Store in a cool, dry, and well-ventilated area, away from direct sunlight, heat sources, and incompatible materials like active metals (aluminum, magnesium).
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Dichloromethane (Methylene Chloride): Uses, Properties & Safety (CAS 75-09-2)

May 22, 2026 Author: ChemService
Dichloromethane (Methylene Chloride): Uses, Properties & Safety (CAS 75-09-2)

What is Dichloromethane (Methylene Chloride)?

Dichloromethane, widely known as methylene chloride, is a clear, colorless, and volatile liquid with a moderately sweet aroma. In the industrial world, it is highly valued for its exceptional ability to dissolve a wide range of organic compounds. With the CAS number 75-09-2, this versatile solvent is a staple in various chemical processes, manufacturing, and maintenance applications.

Key Chemical Properties

PropertySpecification
Common NamesDichloromethane, Methylene Chloride
CAS Number75-09-2
Chemical FormulaCH2Cl2
AppearanceColorless liquid
OdorMildly sweet, chloroform-like

Primary Industrial Uses

  • Paint and Varnish Strippers: This is one of its most famous applications. It effectively breaks down paints, varnishes, and coatings from wood and metal surfaces without damaging the underlying material.
  • Chemical Extraction: In the pharmaceutical and food and beverage industries, it is often used as an extraction solvent. (For instance, it has historically been used to decaffeinate coffee and tea).
  • Manufacturing and Chemical Processes: It serves as a reaction solvent in the production of plastics, polyurethanes, and photographic films.
  • Metal Cleaning and Degreasing: Its quick-drying nature makes it ideal for cleaning metal parts in automotive and aerospace manufacturing.

Critical Safety and Handling Guidelines

WARNING: Heavy Vapor Accumulation
Dichloromethane is highly volatile, and its vapors are heavier than air. Vapors can accumulate rapidly in poorly ventilated or low-lying areas.
  1. Strict Ventilation: Never use this chemical in confined spaces. Always operate under a fume hood or in areas with active, high-capacity exhaust ventilation.
  2. Protective Equipment (PPE): Standard rubber gloves are often insufficient. Use gloves specifically rated for dichloromethane (like PVA or Viton), along with safety goggles and a respirator if ventilation is inadequate.
  3. Storage: Store in a cool, dry, and well-ventilated area, away from direct sunlight, heat sources, and incompatible materials like active metals (aluminum, magnesium).
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