| MALEIC ACID | ||
|
PRODUCT IDENTIFICATION |
||
| CAS NO. | 110-16-7 |
|
| EINECS NO. | 203-742-5 | |
| FORMULA | HOOCCH=CHCOOH | |
| MOL WT. | 116.07 | |
| H.S. CODE | 2917.19 | |
|
TOXICITY |
Oral rat LD50: 708 mg/kg | |
| SYNONYMS | Hydroxysuccinic Acid; | |
| 2-butenedioic acid; cis-1,2-ethenedicarboxylic acid; cis-2-butenedioic acid; cis-butenedioic acid; cis-ethene-1,2-dicarboxylic acid; cis-maleic acid; Malenic Acid; Toxilic acid; (Z)-1,2-ethenedicarboxylic acid; (Z)-2-butenedioic acid; | ||
|
DERIVATION |
||
|
CLASSIFICATION |
|
|
|
PHYSICAL AND CHEMICAL PROPERTIES |
||
| PHYSICAL STATE | white crystals | |
| MELTING POINT |
130 - 131 C |
|
| BOILING POINT | Decomposes | |
| SPECIFIC GRAVITY | 1.59 | |
| SOLUBILITY IN WATER | soluble | |
| pH | < 7 | |
| VAPOR DENSITY | ||
|
AUTOIGNITION |
||
|
NFPA RATINGS |
Health: 3; Flammability: 0; Reactivity: 0 | |
|
REFRACTIVE INDEX |
||
| FLASH POINT | > 100 C | |
| STABILITY | Stable under ordinary conditions | |
|
APPLICATIONS |
||
| Maleic acid (also called cis-butenedioic acid), a white crystals easily soluble in water, acetone, and alcohol, is an unsaturated organic dibasic acid which carboxylic acid groups are next to each other in the cis form. Its trans form isomer is fumaric acid, both are used in making polyesters, alkyd resins, plasticizers and lubricating oils. Maleic anhydride is the main source of maleic acid produced by the hydration. Maleic anhydride is prepared commercially by the oxidation of benzene or by the reaction of C4 (butane) with oxygen in the presence of vanadium catalyst. The physical properties of maleic acid and fumaric acid are very different each other. The cis isomer is the less stable. Maleic acid is used in the preparation of fumaric acid by catalytic isomerization. and other chemical products as a carboxylating agent. It is used as an oil and fat preservative and food acidulant. | ||
| SALES SPECIFICATION | ||
|
APPEARANCE |
clear to pale yellow liquid | |
| PURITY |
99.0% min |
|
| HEAVY METALS |
10ppm max |
|
|
Fe |
5ppm max |
|
|
RESIDUE ON IGNITION |
0.5% max |
|
| WATER |
1.0% max |
|
| TRANSPORTATION | ||
| PACKING | 25kgs in bag | |
| HAZARD CLASS | 8 (Packing Group: III) | |
| UN NO. | 3261 | |
| OTHER INFORMATION | ||
| Hazard Symbols: XN, Risk Phrases: 22-36/37/38
,
Safety Phrases: 26-28A-37 UNSATURATED ALIPHATIC CARBOXYLIC ACIDS (SHORT CHAIN) |
||
