2-methylprop-1-ene

C4H8

CAS115-11-7
GHS02 Gefahrensymbol: Entzündbar – Flamme
GHS04 Gefahrensymbol: Unter Druck stehende Gase – Gasflasche
Danger

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Identification

CAS Number
115-11-7
EC Number
204-066-3
UN Number
1055
Index Number
601-012-00-4
PubChem CID
8255

Physical-chemical properties

Molecular Formula
C4H8
Molar Mass
56.11 g/mol
IUPAC Name
2-methylprop-1-ene

Chemical Identifiers

InChI
InChI=1S/C4H8/c1-4(2)3/h1H2,2-3H3
InChI Key
VQTUBCCKSQIDNK-UHFFFAOYSA-N

Overview

2-methylprop-1-ene (CAS 115-11-7) is a branched alkene gas with high flammability and distinctive reactivity properties. This four-carbon olefin, also known by its IUPAC name 2-methylprop-1-ene, represents an important intermediate in petrochemical synthesis and polymer production. With the molecular formula C4H8 and molecular weight of 56.11 g/mol, this gaseous hydrocarbon exhibits the characteristic double bond reactivity of alkenes while displaying unique properties due to its branched structure. The compound belongs to the same chemical family as simpler alkenes like prop-1-ene, sharing similar reactivity patterns but offering distinct advantages in specific synthetic applications. As a highly flammable gas under pressure, 2-methylprop-1-ene requires careful handling protocols and specialized storage equipment. The substance carries GHS02 and GHS04 pictograms, indicating both fire hazards and pressurized gas risks. Its classification under ADR Class 2 necessitates compliance with stringent transportation regulations for compressed gases. The branched structure of this alkene makes it particularly valuable in producing high-octane fuel additives and specialized polymers where controlled branching is desired. Industrial applications include its use as a monomer in polymer synthesis, particularly for producing specialized rubbers and plastics with enhanced properties. The compound also serves as an intermediate in the manufacture of fuel additives and chemical derivatives that benefit from its unique molecular architecture. Additionally, it finds application in the production of antioxidants and other specialty chemicals where its reactive double bond can be selectively functionalized. OYSI maintains reliable supply chains for 2-methylprop-1-ene to support diverse industrial applications across European markets.

Safety & Classification

Danger
Classification:

Flam. Gas 1; Press. Gas

HHazard Statements (H-Statements)

Describe the nature and severity of the hazard

H220

Extremely flammable gas.

Classification according to CLP Regulation (EC) No 1272/2008. The complete list of hazard and precautionary statements can be found in the Safety Data Sheet (SDS).

First Aid Measures

Transport (ADR)

UN Number1055
ADR Class2
Packing Group
Tunnel CodeB/D
Proper Shipping NameIsobuten, unter Druck verflüssigt
Marine PollutantNo

Frequently Asked Questions

What is 2-methylprop-1-ene?

2-methylprop-1-ene is an organic compound with the molecular formula C4H8 and CAS number 115-11-7. It is a branched alkene with a molecular weight of 56.11 g/mol. This hydrocarbon belongs to the class of flammable gases under pressure, making it a highly reactive chemical compound. It features a double bond between carbon atoms with a methyl substituent, giving it its characteristic chemical properties and reactivity patterns essential for various industrial applications.

What are the physicochemical properties of 2-methylprop-1-ene?

2-methylprop-1-ene is a colorless gas at room temperature and atmospheric pressure due to its low molecular weight of 56.11 g/mol. As a hydrocarbon alkene, it exhibits limited solubility in water but dissolves readily in organic solvents. The compound has a characteristic hydrocarbon odor and exists as a pressurized gas in commercial applications. Its double bond structure makes it chemically reactive, particularly in polymerization and addition reactions.

What is 2-methylprop-1-ene used for?

2-methylprop-1-ene serves primarily as a monomer in polymer production, particularly for manufacturing isobutylene-based polymers and copolymers. It is widely used in the production of butyl rubber, which finds applications in tire inner tubes, pharmaceutical stoppers, and chemical-resistant seals. The compound also serves as an intermediate in organic synthesis and as a raw material for producing various chemicals including tertiary butyl compounds and fuel additives.

How to handle 2-methylprop-1-ene safely?

2-methylprop-1-ene requires careful handling due to its flammable gas classification (Flam. Gas 1). Personnel must wear appropriate personal protective equipment including safety goggles, flame-resistant clothing, and work in well-ventilated areas or under fume hoods. All ignition sources must be eliminated from the work area. Use explosion-proof electrical equipment and ensure proper grounding of all containers. Handle containers gently to prevent damage and potential gas release.

How to store 2-methylprop-1-ene correctly?

2-methylprop-1-ene must be stored in appropriate pressure vessels designed for flammable gases, away from heat sources, sparks, and open flames. Storage areas should be well-ventilated, cool, and dry with temperatures maintained below critical limits. Keep containers upright and secured to prevent falling or damage. Store separately from oxidizing agents and other incompatible materials. Regular inspection of storage containers and pressure relief systems is essential for safe storage.

What to do in case of contact with 2-methylprop-1-ene?

2-methylprop-1-ene exposure requires immediate action depending on the route of contact. For inhalation, move the person to fresh air immediately and seek medical attention if breathing difficulties occur. In case of skin contact, remove contaminated clothing and wash the affected area with soap and water. For eye contact, flush immediately with clean water for at least 15 minutes. Always seek medical attention for significant exposures and provide the safety data sheet to medical personnel.

How to dispose of 2-methylprop-1-ene appropriately?

2-methylprop-1-ene disposal must comply with local, national, and European waste regulations as it is classified as hazardous waste. The gas should never be released directly into the atmosphere due to its flammable nature and environmental impact. Contact licensed waste disposal companies specialized in handling flammable gases. Empty containers may still contain residues and require proper treatment. Consult local environmental authorities for specific disposal requirements and approved disposal facilities in your region.

How to transport 2-methylprop-1-ene?

2-methylprop-1-ene is classified under ADR Class 2 for transport, indicating it is a compressed or liquefied gas. Transportation requires specialized pressure containers designed for flammable gases, properly labeled with appropriate hazard markings and placards. Vehicles must be equipped with proper safety equipment and drivers must hold relevant dangerous goods certifications. Ensure adequate ventilation during transport and avoid exposure to heat sources. Follow all ADR regulations for loading, securing, and route planning.

Is 2-methylprop-1-ene subject to specific regulations?

2-methylprop-1-ene is regulated under European CLP regulation with the classification Flam. Gas 1 and Press. Gas, requiring danger signal word and specific GHS pictograms (GHS02, GHS04). It falls under REACH regulation for chemical registration and safety assessment. The compound is not currently listed as a Substance of Very High Concern (SVHC). Users must comply with workplace safety regulations, transport regulations (ADR), and environmental protection requirements specific to flammable gases.

Where to buy 2-methylprop-1-ene in Europe?

2-methylprop-1-ene is available through OYSI, a leading European distributor of technical chemicals specializing in high-quality industrial compounds. OYSI provides reliable supply chains across Europe with proper documentation including safety data sheets, certificates of analysis, and regulatory compliance documentation. As a specialized chemical distributor, OYSI ensures proper handling, storage, and transportation of this flammable gas while meeting all European regulatory requirements for chemical distribution.

Data Sources

Classification per CLP Regulation (EC) No 1272/2008. Data from ECHA and PubChem.