3-Methyl-1-butene(CAS#563-45-1)
| Risk Codes | R12 - Extremely Flammable R36/37/38 - Irritating to eyes, respiratory system and skin. R65 - Harmful: May cause lung damage if swallowed |
| Safety Description | S16 - Keep away from sources of ignition. S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S62 - If swallowed, do not induce vomitting; seek medical advice immediately and show this container or label. |
| UN IDs | UN 2561 3/PG 1 |
| WGK Germany | 3 |
| FLUKA BRAND F CODES | 4.5-31 |
| Hazard Class | 3.1 |
| Packing Group | I |
Introduction
Properties:-3-Methyl-1-butene is a colorless liquid with a peculiar odor. - It has a low boiling point and a high flash point, which can occur in the presence of flammable gases. - It can react violently with oxygen, so exposure to environments with high oxygen concentrations should be avoided. - It can be dissolved in many organic solvents such as ethanol, acetone, etc. Uses: -3-methyl-1-butene can be used as a solvent or reaction intermediate. - It is commonly used in chemical products such as coatings and plastics. - It can also be used in the production of diesel additives and high-energy fuels. Method: The preparation of -3-methyl-1-butene can be achieved by alkylation reaction, usually n-butane reaction with methylation reagent. - Acidic catalysts, metal catalysts, or enzyme catalysts can be used to facilitate the reaction. Safety Information:- 3-Methyl-1-butene is a combustible substance, avoid contact with open flames or high-temperature surfaces. - Contact with strong oxidants and strong acids should be avoided during handling or storage to avoid possible dangerous reactions. - When in use, wear appropriate protective equipment such as gloves, goggles, and protective clothing. - When handling this compound, it should be done in a well-ventilated area to avoid its vapor concentration exceeding the safe limit.
Application
3-Methyl-1-butene (Isopentene, CAS 563-45-1) is a high-purity branched C5 alpha olefin used as a key monomer and chemical intermediate. As a reactive hydrocarbon, it homo-polymerizes and co-polymerizes to produce specialty polyolefins and elastomers with enhanced flexibility, transparency, and environmental stress-crack resistance. Its terminal vinyl group allows incorporation into polypropylene (PP) and polyethylene (PE) copolymers as a comonomer, adjusting chain branching and improving mechanical properties for food packaging, medical devices, and durable automotive parts. In organic synthesis, this versatile intermediate participates in asymmetric total synthesis of bioactive natural products, such as melanin biosynthesis inhibitors for anticancer research. Additionally, 3-methyl-1-butene is a precursor to isoprene via catalytic dehydrogenation, an essential monomer for synthetic rubber (polyisoprene) and high-performance elastomers. The compound also functions as an oxygenated gasoline additive for octane enhancement and a cold-flow improver in hydrocarbon streams. As a low-density, highly volatile solvent, it is employed in adhesive formulations, industrial paints, and coating systems. For process chemistry, this reactant is used in academic kinetic studies and metallocene-catalyzed polymerizations. Xinchem offers custom synthesis, custom chemical synthesis, and contract manufacturing of high-purity 3-methyl-1-butene with global supply, supporting flexible scaling from R&D to commercial tons. Contact us for a competitive quote.
