2-Methyl-1-butene(CAS#563-46-2)
| Risk Codes | R12 - Extremely Flammable R65 - Harmful: May cause lung damage if swallowed |
| Safety Description | S16 - Keep away from sources of ignition. S62 - If swallowed, do not induce vomitting; seek medical advice immediately and show this container or label. S33 - Take precautionary measures against static discharges. S29 - Do not empty into drains. S7/9 - |
| UN IDs | UN 2459 3/PG 1 |
| WGK Germany | 3 |
| TSCA | Yes |
| HS Code | 29012990 |
| Hazard Note | Irritant |
| Hazard Class | 3 |
| Packing Group | I |
Introduction
2-Methyl-1-butene is an organic compound. The following is an introduction to the properties, uses, preparation methods and safety information of 2-methyl-1-butene: Properties:1. Appearance: Colorless liquid4. Density: 0.661 g/cm35. Solubility: Soluble in alcohols, ethers and some organic solventsUse:1. 2-methyl-1-butene can be used as an important intermediate in organic synthesis for the synthesis of various organic compounds. 2. It can also be used as a solvent and stain remover. Preparation method: There are many preparation methods for 2-methyl-1-butene, and one of the commonly used methods is to prepare by methylation reaction of isobutylene. The specific steps are as follows:1. Isobutylene is reacted with methyl halides (e.g., methyl iodide) and catalyzed by alkali. 2. After the reaction, the product is extracted with ether and purified by distillation to obtain 2-methyl-1-butene. Safety Information:1. 2-methyl-1-butene is a flammable liquid, which may cause combustion and explosion when exposed to ignition sources. 2. During use and storage, contact with strong oxidants should be avoided to prevent dangerous reactions. 3. Exposure to 2-methyl-1-butene may cause irritation and reversible eye and skin damage. 4. Appropriate personal protective measures should be taken during operation, such as wearing chemical goggles, protective gloves and protective clothing. Maintain a well-ventilated working environment.
Application
2-Methyl-1-butene is a branched pentene isomer widely used as a monomer and building block in polymer synthesis and organic chemistry. As a reactive alkene, it is incorporated into polyolefin backbones via coordination or cationic polymerization to adjust polymer crystallinity, flexibility, and melt flow index, and copolymerizes with cycloolefins, isobutene, and dienes to produce specialty elastomers and high‑performance engineering plastics. The compound serves as a key chemical intermediate for preparing pinacolone, tertiary amyl alcohol/phenol, and flavor enhancers/spices for the food and fragrance industry. It functions as a reactive diluent and solvent for organic synthesis, agrochemical/pesticide formulations, photosensitive materials, concrete dispersants, fuel/fuel additives, and stain removers. Under etherification conditions, the compound reacts with ethanol over an acid catalyst to improve the octane number of unleaded gasoline. Via hydroformylation, 2-methyl-1-butene is a precursor for 3‑methylpentanal and 2‑methyl‑2‑sec.butyl‑1,3‑propanediol, a key intermediate for carbamate tranquilizers and antihypertensive drugs. As a certified reference standard (API Butenoate), it is used for analytical method development, method validation (AMV), and quality control (QC) to ensure pharmaceutical traceability. Its branched structure influences reaction pathways and polymer properties, making it valuable for research in electrophilic addition, combustion analysis, and reaction kinetics. Available as a high‑purity, water‑insoluble, extremely flammable clear liquid (≥98%, bp 31‑32 °C). Xinchem offers custom synthesis, custom chemical synthesis, and contract manufacturing of high‑purity 2-Methyl-1-butene with flexible scaling from R&D to commercial tons. Contact us today for a competitive quote and reliable global supply.
