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Merck
CN

8.00380

Maleic acid

for synthesis

Synonym(s):

cis-Butenedioic acid, Toxilic acid

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About This Item

Linear Formula:
HO2CCH=CHCO2H
CAS Number:
Molecular Weight:
116.07
UNSPSC Code:
12352106
NACRES:
NA.22
EC Index Number:
203-742-5
MDL number:
Beilstein/REAXYS Number:
605762
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Product Name

Maleic acid, for synthesis

InChI key

VZCYOOQTPOCHFL-UPHRSURJSA-N

SMILES string

OC(=O)\C=C/C(O)=O

InChI

1S/C4H4O4/c5-3(6)1-2-4(7)8/h1-2H,(H,5,6)(H,7,8)/b2-1-

vapor pressure

<0.1 hPa ( 20 °C)

assay

≥99% (acidimetric)

form

powder

potency

708 mg/kg LD50, oral (Rat)
1560 mg/kg LD50, skin (Rabbit)

pH

1.3 (20 °C, 100 g/L in H2O)

mp

130-135 °C (lit.)

solubility

478.8 g/L

density

1.59 g/mL at 25 °C (lit.)

bulk density

750‑800 kg/m3

storage temp.

2-30°C

Quality Level

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Analysis Note

Assay (HPLC, area%): ≥ 99.0 % (a/a)
Melting range (lower value): ≥ 130 °C
Melting range (upper value): ≤ 135 °C
Assay (acidimetric): ≥ 99.0 %
Identity (IR): passes test

Application


  • Food industry metabolomics: Maleic acid is identified as a key metabolite in the profiling of jelly fungi, aiding in the determination of biomarkers for different flesh colors, which is vital for quality assessment in the food industry (Ye et al., 2024).
  • Chromatography device innovation: Maleic acid contributes to the design and characterization of an electrochemically-modulated membrane chromatography device, enhancing the precision and functionality of separation technologies in analytical chemistry (Röcker et al., 2024).


pictograms

CorrosionExclamation mark

signalword

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

WGK 1


Certificates of Analysis (COA)

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