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CAS Number: 109-87-5
EC Number: 203-714-2
Molecular Formula: C3H8O2
Molecular Weight (g/mol): 76.09
IUPAC Name: dimethoxymethane
DESCRIPTION:
Dimethoxymethane (DMM, methylal) is a biodegradable dimethyl acetal.
Dimethoxymethane can be synthesized by acid catalyzed condensation of formaldehyde with methanol.
Dimethoxymethane is amphiphilic in nature with low viscosity, surface tension and boiling point.
Dimethoxymethane is a flammable, highly volatile solvent with good dissolving power.
DMM is considered as a potential alternative fuel and fuel additive due to its high oxygen content and its ability to enhance the combustion characteristics of diesel and petrol.
Thermal diffusivity of Dimethoxymethane has been determined by photoacoustic method.
Analysis of the molecular structure of DMM by electron diffraction technique shows that Dimethoxymethane has C2 symmetry with a gauche-gauche conformation.
Methylal, is a colorless flammable liquid with a low boiling point, low viscosity and excellent dissolving power.
METHYLAL % 99,5 is Colorless liquid with a chloroform-like odor.
Dimethoxymethane (DMM), a low toxicity chemical reagent and a valuable methanol downstream product, is widely used as an efficient diesel fuel additive as well as an excellent solvent in the pharmaceutical and perfume industries.
DMM can be synthesized from the selective oxidation of methanol (3CH3OH + 1/2O2 → CH3OCH2OCH3 + 2H2O), which may relieve the problem of methanol surplus from coal-derived syngas.
CAS Number: 109-87-5
EC Number: 203-714-2
Molecular Formula: C3H8O2
Molecular Weight (g/mol): 76.09
IUPAC Name: dimethoxymethane
USES OF METHYLAL % 99,5:
Methylal has several use areas.
They include chemical intermediate; solvent; fuel, fuel additive; and polymer modifier STN.
Methylal was formerly used as a surgical anaesthetic; it was found to be slower acting with a more transitory effect than diethyl ether.
Chemical Intermediate:
• starting material in industrial organic syntheses, including formaldehyde synthesis (for manufacture of polyacetal resins) and as formaldehyde replacement in methyl methacrylate synthesis
• reagent/polymer modifier to promote crosslinking, end-capping and storage stability
• reagent in numerous types of organic reactions, including Grignard and Reppe reactions
Solvent:
• solvent/entrainer in azeotropic distillations, supercritical extractions, and waste gas scrubbing
• component of electrolyte solutions for rechargeable lithium batteries
• cosolvent in many industrial binary solvent systems for cleaning, degreasing, and/or drying of metal, glass and plastic; e.g., in the electronics industry for cleaning/degreasing printed circuit boards
• solvent component in many industrial and consumer product aerosol formulations, e.g., perfumes, cosmetics (hair sprays, antiperspirants, sunscreens, etc.), medicinals (skin coolant for pain relief), air fresheners, clothing and household fabric dry cleaning sprays, adhesives and coatings
Fuel or Fuel Additive:
• special purpose fuel
• fuel additive in gasohols
• natural gas additive for anti-hydrate treatment
METHYLAL % 99,5 is used in perfumery, manufacture artificial resins, reaction medium for grignard & reppe reactions.
Methylal, CH30CH20CH3, is of interest as a fuel additive because Methylal has been found to be very effective in reducing smoke emissions in diesel engines.
Methylal is unique among oxygenated fuels in that Methylal has a low autoignition temperature and, therefore, a favorable cetane number.
Dimethoxymethane is naturally present in a limited number of food products, such as cooked shrimp and strawberries.
Dimethoxymethane is used for cleaning products, paints and coatings, spray adhesives, and batteries.
Dimethoxymethane is used as a solvent in certain cosmetic products for hair styling and hair conditioning.
Dimethoxymethane may also be used as an ingredient in certain cleaners.
Globally, dimethoxymethane is used as a reactant and solvent in plastic and resin manufacturing.
Dimethoxymethane is also found in coating products, air care products, fuels, lubricants and greases, and is a permitted food flavouring agent.
CAS Number: 109-87-5
EC Number: 203-714-2
Molecular Formula: C3H8O2
Molecular Weight (g/mol): 76.09
IUPAC Name: dimethoxymethane
Application of METHYLAL % 99,5:
Dimethoxymethane (Formaldehyde dimethyl acetal) may be used in the synthesis of methoxymethyl (MOM) ethers.
Dimethoxymethane may also be used as an external cross-linker to form microporous polymers.
METHYLAL % 99,5 is used as a solvent and in the manufacture of perfumes, resins, adhesives, paint strippers and protective coatings.
• Reaction solvent or an extraction solvent manufacturing pharmaceuticals, aerosols, paints, varnishes and cleanings
• Production of ion exchange resins, polyacetal as a chain length regulator
• Glue Formulations fragrances and pesticides
• Fuel Additive for smoke reduction
• Paint Stripping
• Blowing agent for PU Foams
Advantages Of METHYLAL:
• Excellent Stability
• A versatile replacement solvent
• Excellent stability in acidic or alkaline medium
• Excellent water removal property from organic moecules
Environmental Occurrence of Methylal 99,5%:
Methylal is not known to occur naturally.
However, methylal has been identified as an air pollutant and water pollutant from waste water treatment.
Methylal as a common domestic indoor air pollutant.
Methylal as a volatile organic compound (VOC) emitted into the atmosphere.
Pollution of natural waters in Russia by methylal was attributed to its chemical use in the pharmaceutical industry.
Metabolism of Methylal 99,5%:
Methylal was metabolized by rats to methanol and dimethyl ether in equimolar ratio regardless of the route of administration.
Inhalation experiments showed that the blood methanol concentration was proportional to the concentration of methylal in the air.
In order to identify inhaled compounds which might be metabolized to formaldehyde in the nasal cavity, 32 potential substrates for cytochrome P-450-dependent monooxygenases were screened with rat nasal and, for comparison, liver microsomes.
Methylal was metabolized to formaldehyde at a rate of 270 pmol/mg microsomal protein/minute following incubation of nasal microsomes with 2mM methylal for 30 minutes.
Incubation with liver microsomes produced formaldehyde at a lower but detectable rate in the range of 70-200 pmol/mg microsomal protein/minute, reported by the authors as "trace".
Methylal can release formaldehyde by hydrolysis or by oxidation of the terminal methyl groups.
The authors noted that released formaldehyde may influence the irritancy of inhaled compounds, and this has been suggested to play a role in the tumorigenicity of some compounds.
In their study of methylal toxicity, Weaver and coworkers (1951) found no indication of the presence of formaldehyde or formic acid in the urine or vitreous humor of test animals.
In view of the stability of methylal in neutral or alkaline media, they suggested the possibility that Methylal 99,5% is not hydrolyzed at the pH of body tissue fluids.
Structure/Activity Relationships:
Six compounds, structurally similar to methylal, were screened for relevant information associating these related chemicals with a mutagenic or carcinogenic effect.
No information was found on carcinogenicity or mutagenicity for 2,2-dimethoxypropane or methoxymethane.
Information on carcinogenicity was identified for only one of the compounds, methanol. Mutagenicity data were available for four of the structurally related compounds: diethoxymethane, 1,1-dimethoxyethane, 1,3-dioxane, and methanol.
CAS Number: 109-87-5
EC Number: 203-714-2
Molecular Formula: C3H8O2
Molecular Weight (g/mol): 76.09
IUPAC Name: dimethoxymethane
Specification of METHYLAL % 99,5:
Chemical Name of Material: Dimethoxymethane
CAS: 109-87-5
Density: 0.8600g/mL
Color: Colorless
Melting Point: -105.0°C
Boiling Point: 41.0°C to 42.0°C
Flash Point: −18°C
Assay Percent Range: 99.5% min. (GC)
Infrared Spectrum: Authentic
Molecular Formula: C3H8O2
Linear Formula: CH2(OCH3)2
Fieser: 01,671; 02,271; 06,374; 07,115
Merck Index: 15, 6086
Refractive Index: 1.3525 to 1.3545
Specific Gravity: 0.86
Formula Weight: 76.09
Physical Form: Liquid
Percent Purity: 99.5+%
Viscosity: 3.25 mPa.s (20°C)
Water: 0.03% max.
Boiling point (bp): 45,5 °C
Flash point (flp): -30,5 °C
Melting point (mp): -104,8 °C
vapor density: 2.6 (vs air)
vapor pressure: 6.38 psi ( 20 °C)
Assay: 99%
Form:liquid
autoignition temp.: 459 °F
expl. lim.: 17.6 %
Upper exp. limit, %: 12.6
Lower exp. limit, %: 3.6
Heat of fusion: 7.95 kJ/mol
Heat of vaporization: 30.0 kJ/mol
Heat of combustion: -1936 kJ/mol
CAS Number: 109-87-5
EC Number: 203-714-2
Molecular Formula: C3H8O2
Molecular Weight (g/mol): 76.09
IUPAC Name: dimethoxymethane
SAFETY INFORMATION ABOUT METHYLAL % 99,5:
Storage:
Keep away from heat, sparks, and flame.
Keep away from sources of ignition.
Do not store in direct sunlight.
Store in a tightly closed container.
Store in a cool, dry, well-ventilated area away from incompatible substances.
Flammables-area.
Handling:
Ground and bond containers when transferring material.
Use spark-proof tools and explosion proof equipment.
Avoid contact with eyes, skin, and clothing.
Empty containers retain product residue, (liquid and/or vapor), and can be dangerous.
Take precautionary measures against static discharges.
Keep container tightly closed.
Avoid contact with heat, sparks and flame.
Avoid ingestion and inhalation.
Use with adequate ventilation.
Wash clothing before reuse.
Methylal 99,5% may be under pressure; cool before opening.
Do not use if the material has evaporated to dryness.
Do not pressurize, cut, weld, braze, solder, drill, grind, or expose empty containers to heat, sparks or open flames.
Protection:
Eyes: Wear appropriate protective eyeglasses or chemical safety goggles as described by OSHA's eye and face protection regulations in 29 CFR 1910.133 or European Standard EN166.
Skin: Wear appropriate protective gloves to prevent skin exposure.
Clothing: Wear appropriate protective clothing to prevent skin exposure.
Respirators:
A respiratory protection program that meets OSHA's 29 CFR 1910.134 and ANSI Z88.2 requirements or European Standard EN 149 must be followed whenever workplace conditions warrant a respirator's use.
Small spills/leaks:
Absorb spill with inert material, (e.g., dry sand or earth), then place into a chemical waste container. Avoid runoff into storm sewers and ditches which lead to waterways.
Clean up spills immediately, using the appropriate protective equipment.
Remove all sources of ignition.
Use a spark-proof tool.
Provide ventilation.
A vapor suppressing foam may be used to reduce vapors.
Disposal code: 1
Stability:
Stable at room temperature in closed containers under normal storage and handling conditions.
Incompatibilities:
Strong oxidizing agents.
Decomposition:
Carbon monoxide, carbon dioxide, formaldehyde.
Fire fighting:
Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear.
During a fire, irritating and highly toxic gases may be generated by thermal decomposition or combustion.
Use water spray to keep fire-exposed containers cool.
Water may be ineffective.
Material is lighter than water and a fire may be spread by the use of water.
Containers may explode in the heat of a fire.
May polymerize explosively when involved in a fire.
Runoff to sewer may create fire or explosion hazard.
Extinguishing media:
For small fires, use dry chemical, carbon dioxide, water spray or alcohol-resistant foam.
For large fires, use water spray, fog, or alcohol-resistant foam.
Use water spray to cool fire-exposed containers.
Fire potential: FLAMMABLE.
Hazards:
Irritating gases may be produced when heated.
Containers may explode in fire.
Flashback along vapor trail may occur.
Vapor may explode if ignited in an enclosed area.
Irritating formaldehyde gas may be present in smoke.
NFPA:
Health: 1
Flammability: 3
Reactivity: 1
CAS Number: 109-87-5
EC Number: 203-714-2
Molecular Formula: C3H8O2
Molecular Weight (g/mol): 76.09
IUPAC Name: dimethoxymethane
Synonyms:
methylal
formal
methane
dimethoxy
formaldehyde dimethyl acetal
dimethyl formal
anesthenyl
2,4-dioxapentane
bis methoxy methane
methylene dimethyl ether
methoxymethyl methyl ether
