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M0375

Sigma-Aldrich

Maleic acid

ReagentPlus®, ≥99% (HPLC)

Synonym(s):

cis-Butenedioic acid, Toxilic acid

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About This Item

Linear Formula:
HO2CCH=CHCO2H
CAS Number:
110-16-7
Molecular Weight:
116.07
Beilstein/REAXYS Number:
605762
EC Number:
203-742-5
MDL number:
MFCD00063177
UNSPSC Code:
12352100
PubChem Substance ID:
24896549
NACRES:
NA.21
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grade

reagent grade

Quality Level

200

vapor density

4.0 (at °C, vs air)

vapor pressure

≤0.1 at hPa ( 20 °C)

product line

ReagentPlus®

assay

≥99% (HPLC)

form

powder

concentration

≤100%

impurities

≤2.0% water

ign. residue

≤0.1%

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General description

Maleic acid (MA) is a dicarboxylic acid that undergoes esterification with ethanol in the presence of cation-exchange resin catalysts to form diethyl maleate.[1] Its crystalline structure has been analyzed.[2] Reaction kinetics and mechanism of the isomerization of maleic acid to fumaric acid in the presence of ceric and bromide ions has been investigated.[3] The reaction mechanism and reactivity ratios for the radical copolymerization of maleic acid with styrene have been determined.[4]

Application

Maleic acid has been used in the preparation of tris-maleate buffer[5] and sodium maleate buffer.[6][7] It has also been used for the pretreatment of poplar tracheid cell walls for the spectroscopic analysis of lignin.[8] It may be used to synthesize superswelling acrylamide/maleic acid hydrogels.[9]

Analysis Note

Repurified

Legal Information

ReagentPlus is a registered trademark of Merck KGaA, Darmstadt, Germany

pictograms

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GHS05,GHS07

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Danger

Hazard Classifications

Acute Tox. 4 Dermal - Acute Tox. 4 Oral - Eye Dam. 1 - Skin Corr. 1 - Skin Sens. 1 - STOT SE 3

target_organs

Respiratory system

Storage Class

8A - Combustible corrosive hazardous materials

wgk_germany

WGK 1

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Certificates of Analysis (COA)

Lot/Batch Number
0000435529
0000435529
0000430376
0000432635
0000430382

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Radical copolymerization of maleic acid with styrene.
Switala-Zeliazkow M.
Eur. Polymer J., 35(1), 83-88 (1999)
Swelling equilibria and dye adsorption studies of chemically crosslinked superabsorbent acrylamide/maleic acid hydrogels.
Karadag E, et al.
Eur. Polymer J., 38(11), 2133-2141 (2002)
Esterification of maleic acid with ethanol over cation-exchange resin catalysts.
Yadav GD and Thathagar MB.
Reactive functional Polymers, 52(2), 99-110 (2002)
Determination of total dietary fibre and available carbohydrates: A rapid integrated procedure that simulates in vivo digestion.
McCleary BV, et al.
Starch, 67(9-10), 860-883 (2015)
A refinement of the crystal structure of maleic acid.
James MNG and Williams GJB.
Acta Crystallographica Section B, Structural Science, 30(5), 1249-1257 (1974)
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Acid and Base Chart — Table of Acids & Bases

Acid and base chart lists the strength of acids and bases (strongest to weakest) in order. Simple to use laboratory reference chart for scientists, researchers and lab technicians.

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