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Malonic acid is also known as methane dicarboxylic acid, carrot acid, malic acid reduction, beet acid. There are three kinds of crystal forms, of which two are triclinic, and one is monoclinic. That crystallized from ethanol is white triclinic crystals. Its relative molecular mass is 104.06. The relative density is 1.631 (15 ℃). Melting point is 135.6℃. It decomposes to acetic acid and carbon dioxide at 140℃. It does not decompose at 1.067×103~1.333×103Pa vacuum, but directly sublimates. It is not soluble in benzene. It is soluble in water, and the solubility is respectively 61.1 (0 ℃), 73.5 (20 ℃), 92.6 (50 ℃) in water, and 57 (20 ℃)in ethanol, 5.7 (20 ℃) in diethyl ether. It is slightly soluble in pyridine. It can decompose to formic acid and carbon dioxide in case of potassium permanganate. Malonic acid is dibasic acid. It has a typical reactive of dibasic acids, such as that its methylene is active, and it can be an addition, alkylation, amination, halogenation reaction; its two carboxyl groups are very close and they can be dehydrated; esterification with alcohol; decarboxylation by heating; condensation with carbonyl compounds; addition with compounds that containing active double bonds. Hydroxyl in two carboxyl groups of malonic acid were all replaced by ethoxy (see substitution reaction) to produce diethyl malonate. Diethyl malonate is important raw materials in organic synthesis for dyes and drugs synthesis. Because its molecules containing active methylene, which can react with sodium alcohol to generate sodium malonate. Then sodium malonate reacts with a variety of lively halides to generate substituted malonate. Malonate can prepare various monocarboxylic acids, dicarboxylic acids, keto acids and other compounds by hydrolysis reaction to lose carboxyl. As substituted malonate reacts with urea to prepare a commonly used hypnotic barbiturates. <br/> Since that malonic acid generates carbon dioxide and water after heated without pollution problems, it can be directly used as aluminum surface treatment agent; it is also the raw material in the production of pesticides fungicides Fujione, herbicides Alloxydim; malonic acid is used to prepare diuretic sulfinpyrazone medicine, anti-inflammatory drug phenylbutazone paraben, sedatives bromomethyl Jacinto goods in pharmaceutical industries. In addition, malonic acid and its esters are widely used as pharmaceutical intermediates, such as preparing barbiturates, vitamins B1 and B6, etc. Esters of malonic acid are commonly used in organic synthesis. It also can be used as binding agent, perfum, resin additive, electroplating polishing agent, welding flux and so on.<br/> The above information is edited by the chemicalbook of Ge Qian.
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  • Malonic acid
  • US $0.00 /Kg/Drum
  • CAS:141-82-2
  • Min. Order: 1KG
  • Purity: 99%
  • Supply Ability: 5000mt
  • 2021-10-18
  • Malonic Acid
  • US $15.00 /KG
  • CAS:141-82-2
  • Min. Order: 25KG
  • Purity: 99.5%
  • Supply Ability: 3000tons/month
  • 2021-10-14

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