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Dimethoxymethane Basic information
Dimethoxymethane Chemical Properties
  • Melting point:-105 °C
  • Boiling point:41-43 °C
  • Density 0.860 g/mL at 20 °C(lit.)
  • vapor density 2.6 (vs air)
  • vapor pressure 6.38 psi ( 20 °C)
  • refractive index n20/D 1.354
  • Flash point:-18 °C
  • storage temp. Store at <= 20°C.
  • solubility 32.3 g/100 mL (16°C)
  • form Liquid
  • color Clear colorless
  • OdorMild, ethereal; chloroform-like.
  • PHpH (12.5vol % , 25℃) : 4.5~6.6
  • explosive limit1.6-17.6%(V)
  • Water Solubility 32.3 g/100 mL (16 ºC)
  • Sensitive Moisture Sensitive
  • Merck 14,6012
  • BRN 1697025
  • Henry's Law Constant(x 10-4 atm?m3/mol): 1.73 at 25 °C (Hine and Mookerjee, 1975)
  • Exposure limitsNIOSH REL: TWA 1,000 ppm (3,100 mg/m3), IDLH 2,200 ppm; OSHA PEL: TWA 1,000 ppm; ACGIH TLV: TWA 1,000 ppm (adopted).
  • Stability:Stable. Extremely flammable. Readily forms explosive mixtures with air. Note low flash point and wide explosive limits. Incompatible with strong oxidizing agents, strong acids. May form explosive peroxides upon exposure to air.
  • CAS DataBase Reference109-87-5(CAS DataBase Reference)
  • NIST Chemistry ReferenceMethane, dimethoxy-(109-87-5)
  • EPA Substance Registry SystemDimethoxymethane (109-87-5)
Safety Information
Dimethoxymethane Usage And Synthesis
  • Chemical PropertiesMethylal is a low-boiling solvent, stable in the presence of alkalis and mild acids, and to high temperatures and pressures. It differs from other ethers in that it forms only minute omounts of peroxides. It will dissolve such synthetic resins as nitrocellulose, cellulose acetate and propionate, ethyl cellulose, vinyl, "Epons" and polystyrene, and also many of the natural gums and waxes. Methylal as a latent solvent is activated by the addition of esters, ketones or alcohols. Its evaporation rate, twice that of acetone, places this ether in a class with such solvents as acetone, methyl acetate and ethyl acetate in resin formulations.
  • Chemical PropertiesMethylal is a colorless liquid with a pungent odor.
  • Physical propertiesColorless liquid with a pungent, chloroform-like odor
  • UsesIn perfumery; manufacture of artificial resins; reaction medium for Grignard and Reppe reactions.
  • UsesMethylal is a valuable extraction solvent for pharmaceutical products and a stable, inexpensive solvent for Grignard reactions. Methylal is stable under alkaline and mild acidic conditions.
  • UsesSolvent; fuel; in perfume
  • DefinitionChEBI: An acetal that is the dimethyl acetal derivative of formaldehyde.
  • General DescriptionA clear colorless liquid with a chloroform-like odor. Flash point 0°F. Boiling point 42.3°C. Density 0.864 g / cm3 at 68°F (20°C). Vapors heavier than air.
  • Air & Water ReactionsHighly flammable. Water soluble.
  • Reactivity ProfileDimethoxymethane, an acetal, is incompatible with strong oxidizing agents and acids . Breaks down to formaldehyde and methanol in acidic solutions. A very dangerous fire hazard when exposed to heat, flame or oxidizing agents. May ignite or explode if heated with oxygen [Lewis].
  • HazardFlammable, dangerous fire and explosion risk. Toxic by ingestion and inhalation. Eye irritant and central nervous system impairment.
  • Health HazardVAPOR: Irritating to eyes, nose and throat. Harmful if inhaled. LIQUID: Irritating to skin and eyes. Harmful if swallowed.
  • Fire HazardFLAMMABLE. 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.
  • Chemical ReactivityReactivity with Water: No reaction; Reactivity with Common Materials: No reaction; Stability During Transport: Stable; Neutralizing Agents for Acids and Caustics: Not pertinent; Polymerization: Not pertinent; Inhibitor of Polymerization: Not pertinent.
  • Safety ProfileModerately toxic by subcutaneous route. Mildly toxic by ingestion and inhalation. Can cause injury to lungs, liver, kidneys, and the heart. A narcotic and anesthetic in high concentrations. A very dangerous fire hazard when exposed to heat, flame, or oxidzers. Moderately explosive when exposed to heat or flame. May ignite or explode when heated with oxygen. To fight fire, use foam, CO2, dry chemical. When heated to decomposition it emits acrid smoke and irritating fumes. See also ETHERS.
  • Potential ExposureVapors may form explosive mixture with air. Methylal may be able to form unstable and explosive peroxides. Heating may cause explosion. Incompatible with oxidizers (chlorates, nitrates, peroxides, permanganates, perchlorates, chlorine, bromine, fluorine, etc.); contact may cause fires or explosions. Keep away from alkaline materials, strong bases, strong acids, oxoacids, epoxides. Hydrolyzes readily in presence of acids to generate aldehydes.
  • SourceMethylal is a by-product in the synthesis of trioxane, an intermediate in the manufacture of polyacetal plastics (Albert et al., 2001).
  • ShippingUN1234 Methylal, Hazard Class: 3; Labels: 3-Flammable liquid
  • Purification MethodsIt is a volatile flammable liquid which is soluble in three parts of H2O, and is readily hydrolysed by acids. Purify it by shaking with an equal volume of 20% aqueous NaOH, stand for 20minutes, dry over fused CaCl2, filter and fractionally distil it through an efficient column. Store it over molecular sieves. [Buchler et al. Org Synth Coll Vol III 469 1955, Rambaud & Besserre Bull Soc Chim Fr 45 1955, IR: Wilmshurst Can J Chem 36 285 1958, Beilstein 1 IV 3026.]
  • IncompatibilitiesIf this chemical gets into the eyes, remove any contact lenses at once and irrigate immediately for at least 15 minutes, occasionally lifting upper and lower lids. Seek medical attention immediately. If this chemical contacts the skin, remove contaminated clothing and wash immediately with soap and water. Seek medical attention immediately. If this chemical has been inhaled, remove from exposure, begin rescue breathing (using universal precautions, including resuscitation mask) if breathing has stopped and CPR if heart action has stopped. Transfer promptly to a medical facility. When this chemical has been swallowed, get medical attention. Give large quantities of water and induce vomiting. Do not make an unconscious person vomit
  • Waste DisposalConcentrated waste containing no peroxides: discharge liquid at a controlled rate near a pilot flame. Concentrated waste containing peroxides: perforation of containers of the waste from a safe distance followed by open burning.
Dimethoxymethane Preparation Products And Raw materials
Dimethoxymethane(109-87-5)Related Product Information
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