CAS 75-09-2 Dichloromethane (DCM) also known as methylene chloride, can be safe for industrial use when proper safety controls are in place.
While used in manufacturing and industrial stripping, it requires strict containment, mandatory PPE, and stringent exposure monitoring to prevent injury or death.
DCM Physical & Chemical Properties
| Solubility | Slightly soluble in water, miscible with most organic solvents |
| Vapor Pressure | ~47 kPa (20°C) |
| Dielectric Constant | 8.9 (20°C) |
| Viscosity | 0.44 mPa·s (20°C) |
| Evaporation Rate | Fast |
| Auto-ignition Temperature | ~556 °C |
| UN Number | UN 1593 |
| Hazard Class | 6.1 |
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What are the industrial uses of dichloromethane solvent?
- Paint Stripping and Coating Removal: DCM acts as a powerful stripper, effectively removing paint and varnish.
- Pharmaceutical Manufacturing: 99.9% Dichloromethane is used as a key solvent in the production, concentration, and purification of active pharmaceutical ingredients (APIs), such as steroids, antibiotics, and vitamins.
- Metal Cleaning and Degreasing: Effectively removes oil, grease, and other contaminants from metal surfaces and transport components.
- Food and Beverage Processing: Methylene chloride chemical is used as an extraction solvent for decaffeinating coffee and tea, and for extracting bioactive substances, including alkaloids and flavorings.
- Chemical and Plastics Production: Used in the production of polyurethane, polycarbonate resins, and cellulose triacetate (CTA) for thin film products.
- Electronics and Precision Cleaning: In printed circuit board manufacturing, DCM solvent is used to clean component surfaces before coating conductive materials.
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What are the safety precautions for DCM?
How to handle Dichloromethane safely
- To handle Dichloromethane safely, it is important to follow these basic safety measures:
- Read and understand the DCM safety data sheet (SDS) before using the chemical.
- Wear appropriate personal protective equipment (PPE), including gloves, goggles, and a respirator.
- Work in a well-ventilated area.
- Avoid contact with skin, eyes, and clothing.
Specific safety measures for industrial use
In addition to the general safety measures listed above, there are some specific safety measures that should be followed when using DCM in an industrial setting. These include:
- Provide adequate ventilation to the work area.
- Use DCM in a closed system whenever possible.
- Install emergency eyewash stations and showers in the work area.
- Train workers on the safe handling of DCM.
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