Dichloromethane CAS 75-09-2
Factory wholesale Dichloromethane CAS 75-09-2
- Appearance:Liquid
- Purity:99.8%
- Delivery:30days
- Sample Available:Available
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Name: Dichloromethane
CAS: 75-09-2
MOQ: 1KG
Directory Guidance on Dichloromethane
Chemical Structure
Basic Info:
| Melting point | -97 °C |
| Boiling point | 39.8-40 °C mm Hg(lit.) |
| density | 1.325 g/mL at 25 °C(lit.) |
| vapor density | 2.9 (vs air) |
| vapor pressure | 24.45 psi ( 55 °C) |
| refractive index | n20/D 1.424(lit.) |
Product Introduction:
Dichloromethane (DCM for short), with the chemical formula CH₂Cl₂, is a colorless, transparent, volatile liquid with a pungent odor similar to ether. In its molecular structure, the two hydrogen atoms of the methane molecule are replaced by chlorine atoms. The relative molecular mass of dichloromethane is 84.93, the density is about 1.33 g/cm³, the boiling point is 39.8℃, the melting point is -97℃, it is slightly soluble in water, but it can be miscible with a variety of organic solvents such as ethanol and ether. In addition, it also has a high solubility and can dissolve substances such as phenol, aldehyde, and ketone.
There are two main methods for preparing dichloromethane: natural gas chlorination method and chloromethane chlorination method. The natural gas chlorination method is to react natural gas with chlorine, absorb hydrogen chloride by-product hydrochloric acid through water, and then obtain the finished product through drying, compression, condensation, distillation and other steps. The chloromethane chlorination method is to react chloromethane with chlorine under light, and then produce dichloromethane through alkaline washing, compression, condensation, drying and distillation. The main byproduct of this method is trichloromethane.
In terms of use, dichloromethane has a wide range of applications. It is an important organic solvent and is widely used in the resin and plastics industry, such as cellulose acetate film formation and triacetate cellulose spinning. In addition, it is also used as a solvent in petroleum dewaxing, aerosols, and the production of antibiotics, vitamins, and steroids. In metal surface treatment, dichloromethane can be used as a paint cleaning, degreasing and demolding agent. It is also used for grain fumigation, refrigeration of low-pressure refrigerators and air-conditioning units, and auxiliary foaming agents in the production of polyether urethane foam plastics.
Although dichloromethane has many uses in industry, it is also toxic. Its vapor has an anesthetic effect. Inhaling a large amount of it can cause acute poisoning, with symptoms such as nasal pain, headache, and vomiting. Chronic poisoning may cause dizziness, fatigue, loss of appetite, and impaired hematopoietic function. Dichloromethane can cause dermatitis when in contact with the skin. Therefore, when using and storing it, strict safety measures must be taken to avoid direct contact with the human body and ensure good ventilation conditions.
Nature and Specifications:
| Item | Specification |
| Product Name | Dichloromethane |
| CAS No. | 75-09-2 |
| Appearance | Liquid |
| Shelf Life | 2 years |
| Packing | As your requirements |
| form | Liquid |
| color | APHA: ≤10 |
| Specific Gravity | 1.329 (20/20℃) |
| PH | 7 (20°C) |
| Odor | Odor threshold 160 to 230 ppm |
| Odor Threshold | 160ppm |
Product service:
- Certificate Of Analysis (COA)
- Material Safety Data Sheet (MSDS)
- Route of synthesis (ROS)
- Method of Aanlysis (MOA)
- Nuclear Magnetic Resonance (NMR)
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- Factory audit
Due to its strong solubility and low boiling point, dichloromethane has quickly become the go-to solvent choice in industrial settings for replacing volatile solvents like petroleum ether and ether. Effective at dissolving resins, rubbers, greases and various polymer materials, it has wide applications such as paint dilution, metal degreasing and electronic component cleaning. Dichloromethane can be used in integrated circuit manufacturing to remove photoresist residues; while in polyurethane foam plastic production it acts as a foaming agent to improve product pore structure. Due to its limited miscibility with water it’s also useful in liquid-liquid extraction processes used by pharmaceutical manufacturers or food processing facilities to extract active ingredients from natural products or extract vegetable oils for food processing.
dichloromethane plays an essential role in chemical synthesis. In the Friedel-Crafts reaction, dichloromethane reacts with benzene under the catalysis of aluminum chloride to produce diphenylmethane; when reacting with inorganic fluorides, chlorine atoms can be replaced by fluorine to form fluoromethane derivatives; additionally its pyrolysis products can be further used as raw materials such as formaldehyde and phosgene while its biodegradation by dehalogenase activity provides an environmental governance pathway.
In the field of refrigeration and fire extinguishing, dichloromethane was once used as a refrigerant in low-temperature equipment, but it has gradually been replaced by more environmentally friendly alternatives due to the toxicity of its decomposition products. When used as a fire extinguishing agent, its vapor can quickly isolate oxygen, which is especially suitable for fires in precision instruments, but attention should be paid to the risk of generating phosgene at high temperatures. In recent years, the tightening of environmental regulations has prompted the application of dichloromethane to tilt towards high value-added fields, such as as a solvent for antibiotics such as ampicillin in pharmaceutical synthesis, or to improve film-forming properties in high-end coatings.
As an important organic solvent, dichloromethane has significant advantages in many fields. It has excellent solubility and can efficiently dissolve a variety of organic substances, including adhesives, resins, coatings, oils, fatty acids, and natural products. This strong solubility makes it perform well in industrial cleaning, chemical synthesis, and natural product extraction. For example, in the industrial cleaning process, dichloromethane can easily remove oil and dirt on the metal surface; in the pharmaceutical industry, it can be used to extract active ingredients such as caffeine, showing extremely high application value.
In addition, the high volatility of dichloromethane is also a major advantage. This feature makes it perform well in the cleaning and coating removal process, especially in situations where rapid drying is required, which can significantly improve production efficiency.
In terms of safety, dichloromethane has unique advantages. It is a non-flammable compound that does not burn under normal conditions. Compared with other flammable organic solvents, it can significantly reduce the risk of fire and explosion.
Dichloromethane also has good chemical stability and compatibility. At room temperature and pressure, it is not easy to react chemically and has high compatibility with common materials (such as metals, plastics, etc.). This means that it can be used safely in a variety of industrial applications without causing corrosion or damage to equipment and materials, thereby extending the service life of equipment and reducing maintenance costs.
In addition, the application range of Dichloromethane is extremely wide. With its unique physical and chemical properties, it has important uses in many industries such as chemical, pharmaceutical, cleaning, and plastic manufacturing. in chemical synthesis, it can be used as a reaction solvent; in the pharmaceutical industry, it can be used for the extraction and synthesis of drugs; in industrial cleaning, it is an efficient degreasing agent; in the production of foam plastics, it can also be used as a foaming agent.
Although Dichloromethane has many advantages, due to its toxicity and potential impact on the environment, it is necessary to strictly abide by safety regulations when using it and take appropriate protective measures. Only under the premise of ensuring safety can its value be fully utilized and contribute to industrial production and social development.
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Related References:
chemicalbook-Dichloromethane
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