(Z)-2-Methyl-2-butenedioic acid
Citraconic acid
CAS: 498-23-7
Molecular Formula: C5H6O4
(Z)-2-Methyl-2-butenedioic acid - Names and Identifiers
| Name | Citraconic acid |
| Synonyms | Citraconicacid CITRACONIC ACID Citraconic acid Methylmaleic acid kyselinacitrakonova Maleic acid, methyl- Kyselina citrakonova 2-methylbut-2-enedioate cis-methylbutenedioic acid (E)-2-methyl-2-butenedioate (Z)-2-Methyl-2-butenedioic acid (2Z)-2-Methyl-2-butenedioic acid (2Z)-2-methylbut-2-enedioic acid |
| CAS | 498-23-7 |
| EINECS | 207-858-7 |
| InChI | InChI=1/C5H6O4/c1-3(5(8)9)2-4(6)7/h2H,1H3,(H,6,7)(H,8,9)/p-2 |
(Z)-2-Methyl-2-butenedioic acid - Physico-chemical Properties
| Molecular Formula | C5H6O4 |
| Molar Mass | 130.1 |
| Density | 1,62 g/cm3 |
| Melting Point | 88-94 °C (lit.) |
| Boling Point | 160.75°C (rough estimate) |
| Flash Point | 171.5°C |
| Water Solubility | FREELY SOLUBLE |
| Solubility | DMSO (Sparingly, Sonicated), Water (Slightly) |
| Vapor Presure | 2.09E-05mmHg at 25°C |
| Appearance | Crystalline Powder |
| Color | White to light beige |
| Merck | 14,2321 |
| BRN | 1722679 |
| pKa | pK1:2.29(0);pK2:6.15(+1) (25°C) |
| Storage Condition | Hygroscopic, -20°C Freezer, Under inert atmosphere |
| Stability | Hygroscopic |
| Sensitive | Hygroscopic |
| Refractive Index | 1.4502 (estimate) |
(Z)-2-Methyl-2-butenedioic acid - Risk and Safety
| Hazard Symbols | Xn - Harmful |
| Risk Codes | R22 - Harmful if swallowed R36/37/38 - Irritating to eyes, respiratory system and skin. |
| Safety Description | S36 - Wear suitable protective clothing. S37/39 - Wear suitable gloves and eye/face protection S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. |
| UN IDs | 2811 |
| WGK Germany | 3 |
| RTECS | GE6650000 |
| HS Code | 29171900 |
| Hazard Class | 6.1(b) |
| Packing Group | III |
| Toxicity | LD50 in rats, mice (mg/kg): 1320, 2260 orally (Jenner) |
(Z)-2-Methyl-2-butenedioic acid - Reference Information
| NIST chemical information | Information provided by: webbook.nist.gov (external link) |
| Biological activity | Citraconic acid (CA) is a methyl branched fatty acid found in wild soybeans. |
Last Update：2024-04-09 21:01:54
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