2-Methyl-2-pentenoic acid(CAS#3142-72-1)
| Hazard Symbols | C – Corrosive |
| Risk Codes | R34 – Causes burns R22 – Harmful if swallowed R41 – Risk of serious damage to eyes |
| Safety Description | S26 – In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S36/37/39 – Wear suitable protective clothing, gloves and eye/face protection. S45 – In case of accident or if you feel unwell, seek medical advice immediately (show the label whenever possible.) |
| UN IDs | UN 3261 8/PG 3 |
| WGK Germany | 2 |
| TSCA | Yes |
| HS Code | 29161900 |
| Hazard Class | 8 |
| Packing Group | III |
Introduction
2-Methyl-2-pentenic acid, also known as butenedic acid, is an organic compound. The following is an introduction to the properties, uses, preparation methods and safety information of 2-methyl-2-pentenoic acid:
Quality:
- 2-Methyl-2-pentenoic acid is a colorless to pale yellow liquid with a fruit-like odor.
- 2-Methyl-2-pentenoic acid is soluble in water and organic solvents such as alcohols and ethers.
- It is a stable compound that does not spontaneously ignite or self-detonate at conventional temperatures and pressures.
Use:
- 2-Methyl-2-pentenoic acid is primarily used in the preparation of high-performance polymers such as specialty coatings, adhesives, and sealants.
- It is an important secondary monomer that can be prepared by polymerization of butenic acid copolymers.
Method:
- 2-Methyl-2-pentenoic acid can be prepared by acid-catalyzed addition of cyclohexene.
- Dimethyllithium and cyclohexene are reacted to obtain 2-methyl-1-cyclohexenylmethyllithium, and then hydrolyzed and acidified to obtain 2-methyl-2-pentenoic acid.
Safety Information:
- 2-Methyl-2-pentenoic acid is an irritant substance that may be irritating to the skin and eyes, and necessary precautions such as wearing protective gloves and goggles are required during use.
- It is unstable to light and high temperatures, and polymerization reactions may occur, so prolonged exposure to sunlight or storage at high temperatures should be avoided.
- During handling and storage, it should be kept away from flammable materials and oxidizing agents to prevent the risk of fire or explosion.
- When handling 2-methyl-2-pentenoic acid, proper experimental protocols and safe operating guidelines should be followed. In the event of an accident, appropriate emergency measures should be taken immediately and professional medical assistance should be sought immediately.
