Maleic acid CAS:110-16-7

  • Product Name:Maleic acid
  • CAS:110-16-7
  • Molecular formula:C4H4O4
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Maleic acid CAS:110-16-7

Maleic acid CAS:110-16-7 Basic information

Product Name: Maleic acid
Synonyms: MALEIC ACID, 99%MALEIC ACID, 99%MALEIC ACID, 99%MALEIC ACID, 99%;Maleic acid (cis-butenedioic acid);(Z)-but-2-enedioic acid;Maleic acid, extra pure, Ph Eur, BP;Maleic Acid (300 mg);MALEIC ACID, WHITE;(2Z)-But-2-ene-1,4-dioic acid;Maleic acid, 99% 100GR
CAS: 110-16-7
MF: C4H4O4
MW: 116.07
EINECS: 203-742-5
Product Categories: Building Blocks;C1 to C5;Carbonyl Compounds;Carboxylic Acids;Chemical Synthesis;Nutrition Research;Organic Building Blocks;Panax ginseng;Phytochemicals by Plant (Food/Spice/Herb);API Intermediate;Used in synthetic resin and pesticide;Pharmaceutical interm
Mol File: 110-16-7.mol

Maleic acid CAS:110-16-7 Chemical Properties

density: 1.59 g/mL at 25 °C(lit.)
Melting point: 137-140 °C(lit.)
Boiling point: 275°C
form: Powder/Solid
storage temp.: Store at RT.
Water Solubility: 790 g/L (25 ºC)
refractive index: 1.5260 (estimate)
pka: 1.83(at 25℃)
BRN: 605762
InChIKey: VZCYOOQTPOCHFL-OWOJBTEDSA-N
Fp: 127 °C
solubility: 478.8g/l
NIST Chemistry Reference: 2-Butenedioic acid (Z)-(110-16-7)
Merck: 14,5703
Stability: Stable. Combustible. Incompatible with strong oxidizing agents, bases.
Specific Gravity: 1.59
CAS DataBase Reference: 110-16-7(CAS DataBase Reference)
EPA Substance Registry System: Maleic acid (110-16-7)

分析项目

SPECIFICATION PROPERTIES

技术指标 实测结果

STANDARD RESULTS

外观

Appearance

白色结晶颗粒或白色粉末

White crystalline particles or white powder

纯度

Purity%

99.0-101.0

99.8

色度

Appearance of Solution

合格qualified

合格qualified

澄清度

SATAE of Solution

澄清 clarify

澄清 clarify

重金属Heavy metal(PB)%

≤10

<10

铁Fe

≤5

<5

富马酸Fumaric acid

≤1.5

0.58

水分moisture

 

≤2.0

0.22

硫酸盐灰分

 

sulfate Ash %

 

≤0.1

 

0.1

Maleic acid Usage And Synthesis
DescriptionMaleic acid is an organic compound that is a dicarboxylic acid, a molecule with two carboxyl groups. Its chemical formula is HO2CCHCHCO2H. Maleic acid is the cis-isomer of butenedioic acid, where as fumaric acid is the trans-isomer. It is mainly used as a precursor to fumaric acid, and relative to its parent maleic anhydride, maleic acid has few applications.
Chemical PropertiesMaleic acid, HOOCCH:CHCOOH, also known as maleinic acid and toxilic acid,is a colorless crystalline dibasic acid. It is soluble in water and alcohol. Maleic acid is used in manufacturing synthetic resins, in textile processing, and in preserving oils and fats.
Chemical PropertiesMaleic acid is a white crystalline solid. Faint, acid like odor.
Chemical PropertiesMaleic acid occurs as a white crystalline (monoclinic) powder and possesses a faint acidulous odor and an astringent taste.
Fumaric acid and maleic acid are the simplest unsaturated carboxylic diacids. These acids experience two-step dissociation in aqueous solutions.They have the same structural formula but different spatial configurations. Fumaric acid is the trans and maleic acid the cis isomer. The physical properties of maleic acid and fumaric acid are very different. The cis isomer is less stable. Maleic acid is used in the preparation of fumaric acid by catalytic isomerization.
Physical propertiesMaleic acid is a less stable molecule than fumaric acid. The difference in heat of combustion is 22.7 kJ·mol?1. The heat of combustion is -1355 kJ / mole. Maleic acid is more soluble in water than fumaric acid. The melting point of maleic acid (135 °C) is also much lower than that of fumaric acid (287 °C). Both properties of maleic acid can be explained on account of the intramolecular hydrogen bonding that takes place in maleic acid at the expense of intermolecular interactions, and that are not possible in fumaric acid for geometric reasons.
UsesMaleic acid is an industrial raw material for the production of glyoxylic acid by ozonolysis.
Maleic acid may be used to form acid addition salts with drugs to make them more stable, such as indacaterol maleate.
Usesmanufacture of artificial resins; to retard rancidity of fats and oils in 1:10,000 (these are said to keep 3 times longer than those without the acid); dyeing and finishing wool, cotton, and silk; preparing the maleate salts of antihistamines and similar drugs.
DefinitionChEBI: A butenedioic acid in which the double bond has cis- (Z)-configuration.
Production MethodsMaleic anhydride is the main source of maleic acid produced by hydration. Maleic anhydride is prepared commercially by the oxidation of benzene or by the reaction of butane with oxygen in the presence of a vanadium catalyst.
ReactionsAlthough not practised commercially, maleic acid can be converted into maleic anhydride by dehydration, to malic acid by hydration, and to succinic acid by hydrogenation (ethanol / palladium on carbon). It reacts with thionyl chloride or phosphorus pentachloride to give the maleic acid chloride (it is not possible to isolate the mono acid chloride). Maleic acid, being electrophilic, participates as a dienophile in many Diels - Alder reactions.
Synthesis Reference(s)Journal of the American Chemical Society, 86, p. 4603, 1964 DOI: 10.1021/ja01075a017
The Journal of Organic Chemistry, 60, p. 6676, 1995 DOI: 10.1021/jo00126a013
Organic Syntheses, Coll. Vol. 2, p. 302, 1943
General DescriptionMaleic acid is a colorless crystalline solid having a faint odor. Maleic acid is combustible though Maleic acid may take some effort to ignite. Maleic acid is soluble in water. Maleic acid is used to make other chemicals and for dyeing and finishing naturally occurring fibers.
Air & Water ReactionsSoluble in water.


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