Maleic acid
SIAL/M0375 - ReagentPlus®, ≥99% (HPLC)
Synonym: cis-Butenedioic acid; Toxilic acid
Empirical Formula (Hill Notation): C4H4O4
Molecular Weight: 116.07
EC Number: 203-742-5
MDL Number: MFCD00063177
Linear Formula: HO2CCH=CHCO2H
Product Type: Chemical
This picture is provided solely for illustration purposes. Optical properties of the actual product may deviate. Relevant product information is printed on labeled products and other accompanying or available information material.
This image depicts SKU: M0375-100G
This image depicts SKU: M0375-100G
This picture is provided solely for illustration purposes. Optical properties of the actual product may deviate. Relevant product information is printed on labeled products and other accompanying or available information material.
This image depicts SKU: M0375-500G
This image depicts SKU: M0375-500G
This picture is provided solely for illustration purposes. Optical properties of the actual product may deviate. Relevant product information is printed on labeled products and other accompanying or available information material.
This image depicts SKU: M0375-1KG
This image depicts SKU: M0375-1KG
| assay | ≥99% (HPLC) |
| density | 1.59 g/mL at 25 °C (lit.) |
| form | powder |
| ign. residue | ≤0.1% |
| impurities | ≤2.0% water |
| InChI | 1S/C4H4O4/c5-3(6)1-2-4(7) |
| InChI key | VZCYOOQTPOCHFL-UPHRSURJSA |
| mp | 130-135 °C (lit.) |
| pKa (25 °C) | (1) 1.97, (2) 6.24 |
| product line | ReagentPlus® |
| Quality Level | 200  |
| SMILES string | OC(=O)C=C/C(O)=O |
| Application: | Maleic acid has been used in the preparation of tris-maleate buffer and sodium maleate buffer. It has also been used for the pretreatment of poplar tracheid cell walls for the spectroscopic analysis of lignin. It may be used to synthesize superswelling acrylamide/maleic acid hydrogels. |
| 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. Its crystalline structure has been analyzed. Reaction kinetics and mechanism of the isomerization of maleic acid to fumaric acid in the presence of ceric and bromide ions has been investigated. The reaction mechanism and reactivity ratios for the radical copolymerization of maleic acid with styrene have been determined. |
| Legal Information: | ReagentPlus is a registered trademark of Sigma-Aldrich Co. LLC |
| Packaging: | 1 kg in poly bottle |
| Packaging: | 100, 500 g in poly bottle |
| Packaging: | 25 kg in poly drum |
| Quality: | Repurified |
| Symbol |   GHS05,GHS07 |
| Signal word | Danger |
| Hazard statements | H302 + H312 - H315 - H317 - H318 - H335 |
| Precautionary statements | P261 - P264 - P280 - P301 + P312 - P302 + P352 + P312 - P305 + P351 + P338 |
| Hazard Codes | Xn |
| Risk Statements | 21/22-37/38-41-43 |
| Safety Statements | 24-26-28-36/37/39-46 |
| RIDADR | UN 3077 9 / PGIII |
| WGK Germany | WGK 1 |
| Purity | ≥99% (HPLC) |
| mp | 130-135 °C (lit.) |
| Density | 1.59 g/mL at 25 °C (lit.) |
| UNSPSC | 12352100 |