ホルムアルデヒドジメチルアセタール

危険有害性情報のコード(GHS)

• 絵表示(GHS)

  

• 注意喚起語

  Danger

• 危険有害性情報

  H225：引火性の高い液体および蒸気

• 注意書き

  P210：熱/火花/裸火/高温のもののような着火源から遠ざ けること。－禁煙。

  P233：容器を密閉しておくこと。

  P240：容器を接地すること/アースをとること。

  P241：防爆型の電気機器/換気装置/照明機器/．．．機器を使 用すること。

  P242：火花を発生させない工具を使用すること。

  P243：静電気放電に対する予防措置を講ずること。

ホルムアルデヒドジメチルアセタール 価格

ホルムアルデヒドジメチルアセタール 化学特性,用途語,生産方法

• 外観

  無色澄明の液体

• 定義

  本品は、次の化学式で表されるエーテルである。

• 溶解性

  水に可溶 (33g/100ml水), ほとんどの有機溶剤に易溶。エタノール及びアセトンに極めて溶けやすく、水に溶けやすい。

• 解説

  ホルムアルデヒドジメチルアセタール，無色の液体．融点－105 ℃，沸点41～42 ℃．d₄²⁰"0.8593．n_D¹⁸"1.3589．揮発性．ほとんどの有機溶媒に可溶．クロロホルムに似た臭気を有する．ヨウ化水素と反応してヨウ化メチルとホルムアルデヒドになる．溶剤，香料，有機合成などに用いられる．肝臓や腎臓障害の原因になるほか，高濃度では催眠性がある．
  森北出版「化学辞典（第2版）

• 用途

  有機合成原料、溶剤

• 化粧品の成分用途

  溶剤、香料

• 製造

  ホルムアルデヒドジメチルアセタール，メチラールともいう．パラホルムアルデヒドを少量の硫酸の存在下でメタノールと加熱すると得られる．

• 化学的特性

  Dimethoxymethane, also called methylal, is a colorless flammable liquid with a low boiling point, low viscosity and excellent dissolving power. It is 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.

• 物理的性質

  Dimethoxymethane appears as a clear colorless liquid with a pungent, 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.

• 使用

  Dimethoxymethane (Methylal) 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. Its dissolving ability is stronger than ether, acetone, and methanol and azeotrope can dissolve nitrocellulose with high nitrogen content. Dimethoxymethane is mainly used in the production of anion-exchange resins, and also as solvents and special fuels.

• 主な応用

  Dimethoxymethane is a versatile chemical with applications in many industries such as paints, perfume, resins, pharmacy, paint strippers, protective coatings, and fuel additives.
  It may be used in the synthesis of methoxymethyl (MOM) ethers.
  It may also be used as an external cross-linker to form microporous polymers.
  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.
  Blowing agent for PU Foams.

• 定義

  ChEBI: Dimethoxymethane is an acetal that is the dimethyl acetal derivative of formaldehyde. It is an acetal and a diether. It derives from a methanediol.

• 一般的な説明

  Dimethoxymethane (DMM, methylal) is a biodegradable dimethyl acetal. It can be synthesized by acid catalyzed condensation of formaldehyde with methanol. It is amphiphilic in nature with low viscosity, surface tension and boiling point. It 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. Its thermal diffusivity has been determined by photoacoustic method. Analysis of the molecular structure of DMM by electron diffraction technique shows that it has C2 symmetry with a gauche-gauche conformation.

• 空気と水の反応

  Highly flammable. Water soluble.

• 反応プロフィール

  Dimethoxymethane, 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].

• 健康ハザード

  VAPOR: Irritating to eyes, nose and throat. Harmful if inhaled. LIQUID: Irritating to skin and eyes. Harmful if swallowed.

• 火災危険

  FLAMMABLE. 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.

• 安全性プロファイル

  Moderately 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.
  Dimethoxymethane is considered to be of low hazard potential to humans given that no adverse effects or organ-specific toxicity were observed at inhalation exposures as high as 10 068 ppm (31 334 mg/m3) in rats, and considering the available information indicating a lack of genotoxic, mutagenic or developmental effects. As dimethoxymethane is considered to be of low hazard potential, the risk to human health is considered to be low.

• 職業ばく露

  Vapors 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.

• 輸送方法

  UN1234 Methylal, Hazard Class: 3; Labels: 3-Flammable liquid

• 純化方法

  It 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.]

• 廃棄物の処理

  Concentrated 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.

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