Due to Covid 19, we are only fulfilling our existing orders. More stock is on its way for new orders. Re-opening in 2 weeks. Still accepting new business inquires and purchase orders.
IMPORTANT - Click here for more info
Buy Methylene Chloride Online (C7H8) Or By Phone: 512-668-9918
If you have questions about ordering methylene chloride online here at LabAlley.com or would like to place an order, call 512-668-9918 or email firstname.lastname@example.org to talk with a methylene chloride specialist. Methylene chloride, which is also called dichloromethane or DCM, is a clear, colorless, non-flammable, volatile liquid with a chloroform-like smell. Contact Lab Alley for a methylene chloride MSDS (safety data sheet).
Dichloromethane, commonly called methylene chloride, is a solvent that is widely used in chemical research and manufacturing. It is a highly volatile liquid (see fast facts table), but it is neither flammable nor explosive in air. Dichloromethane is commonly produced by chlorinating methane. The process also produces the other three C1 chlorohydrocarbons—chloromethane, trichloromethane (chloroform), and tetrachloromethane (carbon tetrachloride). The four are separated via distillation. Although dichloromethane is the least toxic C1 chlorohydrocarbon, it does present hazards. Inhaling it can produce symptoms ranging from drowsiness to respiratory tract irritation and even death. It also may be carcinogenic, but not enough studies have been done to establish the degree of exposure that causes cancer. Despite its health risks, dichloromethane is one of the main solvents used to decaffeinate coffee beans. After the caffeine is removed, the solvent’s volatility makes it easy to remove residual solvent. Any remaining dichloromethane is well below the 10-ppm concentration allowed by the US Food and Drug Administration. Read more here.
Methylene chloride (CH2Cl2) is a colorless liquid that can harm the eyes, skin, liver, and heart. Exposure can cause dowsiness, dizziness, numbness and tingling limbs, and nausea. It may cause cancer. Severe exposure can cause loss of consciousness and death. Read more here.
The individual bonds within dichloromethane are somewhat polar due to the electronegativity differences between C&H and between C&Cl, so yes, it is polar at the bond level. However, the net polarity is fairly small, so that the molecule is barely polar. Read more here.
Methylene chloride is used as an effective reaction and re-crystallization solvent in the extraction of several pharmaceutical compounds and in the production of many antibiotics and vitamins. Read more here.
Polycarbonates can be solvent bonded to themselves or other plastics with methylene chloride. Methylene chloride is a very fast-drying solvent cement for polycarbonate and is recommended for use in only temperate climate zones and when bonding small areas together. Read more here.
Dichloromethane (DCM or methylene chloride) is an organochloride compound with the formula CH2Cl2. This colorless, volatile liquid with a moderately sweet aroma is widely used as a solvent. Although it is not miscible with water, it is polar, and miscible with many organic solvents. Read more here.
Dichloromethane, otherwise known as methylene chloride, is a common solvent in paint remover and is used for liquid–liquid extraction in laboratories. Acute toxicity is caused by CNS depression, and fatalities have resulted from exposure. Read more here.
The beans are washed with copious amounts of water to extract the coffee and other water-soluble compounds, then that coffee solution is mixed with dichloromethane to extract the caffeine from the water. The caffeine transfers over to the dichloromethane, leaving the coffee flavors and other compounds in the water. Read more here.
Methylene chloride (MC) is a solvent used in both methods of direct decaffeination. During this decaffeination process, the coffee beans are soaked in hot water to extract much of the caffeine from the beans. Read more here.
Paint Strippers: Methylene chloride is a key ingredient in a variety of paint strippers sold in the U.S. Adhesives: This chemical is also used in a range of adhesives, such as acrylic cement for hobbyists. Read more here.
In contrast, dichloromethane (methylene chloride, CH2Cl2) is a polar molecule with a net polarity away from the partially positive carbon atom toward the partially negative chlorine atoms. Read more here.
Information About Methylene Chloride
Methylene chloride, also known as dichloromethane or DCM, is a solvent used in a range of consumer products and industrial chemicals. Methylene chloride is used as a solvent in paint and varnish removers and as a degreasing agent. Dichloromethane chemically welds certain plastics.
Dichloromethane is a geminal organic chemical. It is also known to the scientists under the names methylene chloride or methylene dichloride. The substance may also be called refrigerant-30 freon-30, R-30, DCM, UN 1593, solmethine, narkotil, solaesthin or MDC. The formula of the chemical is CH2Cl2, the CAS number 75-09-2. Methylene chloride is used in manufacturing of hydroflorocarbons such as HFC-32.
Dichloromethane is a colorless liquid with a moderately sweet, chloroform-like aroma. It is highly volatile and emits toxic fumes when heated. The chemical has no definite flash point, though it forms flammable vapor-air mixtures. It is fully miscible with carbon tetrachloride, ethyl acetate, chloroform, alcohol, benzene, diethyl ether and hexanes.
Methylene Chloride Uses
DCM's volatility and ability to dissolve and extract a wide range of organic compounds makes it a useful solvent for many chemical processes. In laboratories, methylene chloride is used to extract chemicals from plants or foods for pharmaceutical medicines such as steroids, antibiotics and vitamins. Medical equipment can be quickly and efficiently cleaned with methylene chloride cleaners without causing corrosion problems or damage to heat-sensitive parts.
Methylene chloride is widely used as a paint stripper and a degreaser. In 2019, the U.S. Environmental Protection Agency (EPA) issued a final rule to prohibit the manufacture (including import), processing, and distribution of methylene chloride in all paint removers for consumer use. In the food industry, it has been used to extraction solvent for spice oleoresins, process spices, decaffeinate coffee and tea as well as to prepare extracts of hops and other flavorings. DCM was the solvent of choice for caffeine extraction in the 1970s, however when it was found to be carcinogenic it was soon replaced by other non-toxic solvents.
Its volatility has led to its use as an aerosol spray propellant and as a blowing agent for polyurethane foams. Methylene chloride/ dichloromethane is used as a solvent to remove chemical compounds from the stems, stalks, roots, flowers, buds and leaves from medicinal plants.
Methylene Chloride And Dichloromethane For Auto Repair Shops And Machinists
Although pure dichloromethane, or pure methylene chloride, is potentially lethal, it is a good solvent for use in organic chemistry laboratories to separate and extract organic products. Dichloromethane is an organic solvent used in chemistry laboratories for peptide synthesis and elution. Methylene chloride is the most common solvent for extraction in liquid-liquid extraction of water because it is only slightly miscible with water and it extracts an acceptably wide range of nonpolar analytes.
Chloroform and dichloromethane are mixed to produce solvents that are used to extract and purify compounds and botanicals from medicinal plant material and herbs.
Dichloromethane (DCM or methylene chloride) is an organochlorine compound with the formula CH2Cl2. This colorless, volatile liquid with a moderately sweet aroma is widely used as a solvent. Although it is not miscible with water, it is polar, and miscible with many organic solvents.
What Products Is Methylene Chloride Found In?
It can be found in certain home maintenance products along with aerosol and pesticide products and is used in the manufacture of photographic film. The chemical may be found in some spray paints, automotive cleaners, and other household products. For more information about products that contain methylene chloride, also known as dichloromethane, click here.
How Is Methylene Chloride (Dichloromethane/ DCM) Made?
DCM is produced by treating either chloromethane or methane with chlorine gas at 400–500 °C. Dichloromethane was first prepared in 1839 by the French chemist Henri Victor Regnault (1810–1878), who isolated it from a mixture of chloromethane and chlorine that had been exposed to sunlight.
Environmental Effects Of Dichloromethane
The majority of dichloromethane in the environment is the result of industrial emissions. At sufficiently high concentrations, dichloromethane may harm wildlife, but the effects are minimized by the rapid evaporation of the liquid into the air in which it slowly breaks down into other substances. As a VOC, it is thought to contribute only slightly to the formation of potentially damaging ground level ozone or photochemical smogs. The slow degradation of dichloromethane in air means that it can be carried long distances to remote locations. Although it can remove ozone, dichloromethane usually reacts with other air pollutants in the lower atmosphere and so does not significantly deplete the ozone layer in the high stratosphere (which protects the earth from harmful UV sun rays).
How Can Exposure to Methylene Chloride Affect Human Health?
Exposure to normal environmental concentrations of methylene chloride/ dichloromethane is unlikely to damage human health. However inhalation of high concentrations (following an accidental release for example) for even short amounts of time may damage the nervous system and the heart and may also cause cancer. Inhalation of ground level ozone (in the formation of which dichloromethane is slightly involved) can exacerbate respiratory conditions such as asthma.
The U.S. Occupational Safety and Health Administration (OSHA) monitors and regulates methylene chloride in industrial settings. OSHA’s Methylene Chloride Standard sets a permissible exposure limit of 25 parts of methylene chloride per million parts of air over an eight-hour period. Employers must follow OSHA requirements applicable to worker protection, including maintaining proper ventilation and use of respirators and other safety gear. Methylene chloride is toxic and can cause death.
Canada's federal government named methylene chloride a toxic substance under the Canadian Environmental Protection Act (Cepa) more than a decade ago. But it has not taken steps to regulate its use in paint strippers, nor required that such products be labelled to inform consumers about the risk they pose. Retailer Canadian Tire is voluntarily phasing out paint strippers that contain methylene chloride and N-methyl-2-pyrrolidone (NMP) by the end of the year. The move follows in the footsteps of US chains including Walmart and Home Depot.
Methylene chloride is suspected of causing cancer. The inhalation of methylene chloride (dichloromethane) can have anesthetic effects, cause nausea and drunkenness. If methylene chloride (dichloromethane) contacts the skin and eyes it can cause irritation. Methylene chloride (dichloromethane) is flammable under specific conditions. Methylene chloride (dichloromethane gives off irritating or toxic fumes (or gases) in a fire. Methylene chloride (dichloromethane) is explosive under specific conditions. For more information about the health effects of methylene chloride (dichloromethane), click here.
Methylene Chloride Polarity
Dichloromethane/ methylene chloride has a role as a polar aprotic solvent. Methylene chloride or dichloromethane is moderately polar. CH2Cl2 is fairly polar at the bond level, but hardly at all at the molecular level due to symmetry-based cancellation of polarity.
It smells sweet, is potentially lethal and organic chemists rely on it: Emily James on dichloromethane. As an organic chemist, I’ve had a lot of exposure to organic solvents, especially the popular dichloromethane, also known as DCM or methylene chloride. Dichloromethane is a volatile, colourless liquid, with a mildly sweet, not unpleasant odour. It’s immiscible with water but can dissolve a wide range of organic compounds. These properties make it the perfect solvent for use in the lab, and indeed that how I used it - to separate and extract organic products. But it’s not just useful in the lab; coffee, a very popular drink amongst researchers, was once decaffeinated using DCM. Unroasted beans would be steamed and then repeatedly rinsed in DCM, which would extract the caffeine. The solvent would then be drained away, leaving behind coffee beans packed full of flavour, but without the buzz. An alternative method was to essentially make a giant pot of very strong coffee, then extract the caffeine using DCM. When a new batch of beans was added to the brew, the higher concentration of caffeine in the beans would leach out into the water, decaffeinating the beans without removing any of the compounds essential to the flavour of the coffee. DCM was the solvent of choice for caffeine extraction in the 1970s, however when it was found to be carcinogenic it was soon replaced by other non-toxic solvents. DCM is not only carcinogenic, but if it’s inhaled, it can also affect the central nervous system. On one occasion I was ‘extracted’ from the lab by my supervisor at the end of a long day, as my blushing cheeks and dazed expression revealed how productive I’d been with my own extractions. It was a good thing that she did tell me to take a (decaffeinated) coffee break - exposure can be fatal, with the most prominent symptoms being respiratory depression and narcosis. Due to its high volatility, toxic vapours can build up quickly in small spaces, such as bathrooms, if left unventilated. The solvent has unfortunately led to the deaths of several bathtub refinishers, who used DCM as an effective paint stripper. The enzyme Cytochrome P-450 also metabolises DCM in the body to produce carbon monoxide, which could potentially lead to carbon monoxide poisoning. Although DCM has a toxic dark side, it’s found a light-hearted use in a Chinese toy – the drinking bird. The bird is made from a glass body containing dichloromethane - with two bulbs, representing the head and body, connected by a tube. Drinking birds are heat engines that use a temperature difference between the head and body to convert heat energy to mechanical work. This work takes the form of the bird tipping back and forth, just like it’s drinking from a cup of water. Drinking birds have featured in many works of fiction to automatically press buttons or set off explosions. In The Simpsons episode ‘King-Size Homer’, Homer leaves a drinking bird in charge of safety at the nuclear power plant, by placing it in front of his computer keyboard while he irresponsibly goes out to watch a film. The bird repeatedly presses the ‘Y’ key to indicate a ‘yes’ in response to the computer prompts and almost causes a nuclear meltdown when it falls over and Homer isn’t around to pick it up. If he had realised the bird’s peril, he would have balanced it back vertically on its pivot to start the tipping motion again. From this point, water from the bird’s head evaporates, lowering the temperature through the heat of vapourisation. The decrease in temperature causes the dichloromethane vapour in the head to condense, which reduces the pressure in the head according to the ideal gas law. The higher vapour pressure in the warmer base of the bird pushes dichloromethane up its neck, causing it to become top heavy and tip over into the traditional water source, or the keyboard in Homer’s case. The liquid is then displaced back into the base of the bird by the warm DCM vapour rising, thus returning the bird to its original position and the pressure back to equilibrium. Dichloromethane plays an important part in the mechanism; its low boiling point means the drinking bird can function at room temperature. The bird can move even without a water source, like in the Simpson’s episode, – as long as the body is heated to a higher temperature than the head. Some people believe that the toy is a perpetual motion machine; however this is unfortunately not true, as it uses temperature gradients as an energy source. So the next time you’re enjoying a cup of decaf, taking a bath or thinking about leaving a drinking bird in charge of your work whilst you sneak off on holiday, spare a thought for dichloromethane – the organic chemist’s favourite smelling solvent.