디메톡시메탄

디메톡시메탄 속성

디메톡시메탄 C화학적 특성, 용도, 생산

화학적 성질

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.

물리적 성질

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.

용도

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.

주요 응용

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.

정의

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.

일반 설명

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.

공기와 물의 반응

Highly flammable. Water soluble.

반응 프로필

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].

건강위험

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

화재위험

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.

Safety Profile

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.

잠재적 노출

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.

운송 방법

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

Purification Methods

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.]

폐기물 처리

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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디메톡시메탄 공급 업체

공급자	전화	이메일	국가	제품 수	이점
Hebei Chuanghai Biotechnology Co,.LTD	+86-13131129325	sales1@chuanghaibio.com	China	5893	58
Capot Chemical Co.,Ltd.	+86-（0）57185586718 +86-13336195806	sales@capot.com	China	29791	60
Shanghai Daken Advanced Materials Co.,Ltd	+86-371-66670886	info@dakenam.com	China	18648	58
Shanghai Bojing Chemical Co.,Ltd.	+86-86-02137122233 +8613795318958	bj1@bj-chem.com	China	299	55
Henan Tianfu Chemical Co.,Ltd.	+86-0371-55170693 +86-19937530512	info@tianfuchem.com	China	21639	55
Hefei TNJ Chemical Industry Co.,Ltd.	+86-0551-65418679 +8618949832763	info@tnjchem.com	China	2986	55
career henan chemical co	+86-0371-86658258 +8613203830695	sales@coreychem.com	China	29885	58
SHANDONG ZHI SHANG CHEMICAL CO.LTD	+86 18953170293	sales@sdzschem.com	China	2930	58
Hubei Jusheng Technology Co.,Ltd.	18871490254	linda@hubeijusheng.com	CHINA	28172	58
Xiamen AmoyChem Co., Ltd	+86-86-5926051114 +8618959220845	sales@amoychem.com	China	6383	58

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