2,2-dimethylpropane
C5H12
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Identification
- CAS Number
- 463-82-1
- EC Number
- 207-343-7
- UN Number
- 2044
- Index Number
- 601-005-00-6
- PubChem CID
- 10041
Physical-chemical properties
- Molecular Formula
- C5H12
- Molar Mass
- 72.15 g/mol
- IUPAC Name
- 2,2-dimethylpropane
Chemical Identifiers
- InChI
- InChI=1S/C5H12/c1-5(2,3)4/h1-4H3
- InChI Key
- CRSOQBOWXPBRES-UHFFFAOYSA-N
Overview
2,2-dimethylpropane (CAS 463-82-1) is a highly branched alkane hydrocarbon with exceptional volatility and flammability characteristics. This saturated hydrocarbon, also known by its systematic IUPAC name 2,2-dimethylpropane, represents one of the most compact pentane isomers with a molecular formula of C5H12 and molecular weight of 72.15 g/mol. The compound features a distinctive quaternary carbon center where four methyl groups are attached to a central carbon atom, creating a highly symmetrical and branched molecular structure that significantly influences its physical and chemical properties. As a flammable gas under standard conditions, 2,2-dimethylpropane requires careful handling protocols due to its classification as Flam. Gas 1 and Press. Gas according to GHS standards. The substance exhibits extremely low boiling point characteristics typical of highly branched alkanes, distinguishing it from linear hydrocarbons and related compounds such as methanethiol in terms of volatility behavior. Safety considerations are paramount when working with this material, as indicated by the Danger signal word and associated GHS02 and GHS04 pictograms highlighting fire and pressure hazards. Industrial applications of 2,2-dimethylpropane primarily focus on its role as a specialized solvent in petrochemical processes and as a reference standard in analytical chemistry applications. The compound also serves as a valuable research chemical for studying branched alkane behavior and combustion characteristics. Its unique molecular geometry makes it particularly useful in fundamental hydrocarbon research where highly symmetrical structures are required. OYSI maintains reliable supply chains for 2,2-dimethylpropane to support European industrial and research applications, ensuring consistent availability for qualified customers with appropriate handling capabilities.
Safety & Classification
Flam. Gas 1; Press. Gas; Aquatic Chronic 2
GHS Pictograms
HHazard Statements (H-Statements)
Describe the nature and severity of the hazard
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 Number | 2044 |
| ADR Class | 2 |
| Packing Group | |
| Tunnel Code | B/D |
| Proper Shipping Name | 2,2-Dimethylpropan, unter Druck verflüssigt |
| Marine Pollutant | No |
Frequently Asked Questions
What is 2,2-dimethylpropane?
2,2-dimethylpropane is a branched alkane hydrocarbon with the molecular formula C5H12 and CAS number 463-82-1. Also known as neopentane, it consists of a central carbon atom bonded to four methyl groups, creating a highly symmetrical tetrahedral structure. With a molecular weight of 72.15 g/mol, this compound is classified as a flammable gas under normal conditions and poses significant safety considerations due to its high flammability and pressure gas characteristics.
What are the physicochemical properties of 2,2-dimethylpropane?
2,2-dimethylpropane is a colorless gas at room temperature with a boiling point of 9.5°C and melting point of -16.6°C. It exhibits low solubility in water but is highly soluble in organic solvents. The compound has a characteristic hydrocarbon odor and forms a highly symmetrical molecular structure. Due to its branched configuration, it displays different physical properties compared to its linear isomer n-pentane, including lower boiling point and higher octane rating.
What is 2,2-dimethylpropane used for?
2,2-dimethylpropane serves primarily as a high-octane fuel additive and reference standard in the petroleum industry. It is used in research applications for calibration purposes and as a solvent in specialized chemical processes. The compound finds application in the production of other chemicals through various organic synthesis reactions. Its high octane rating makes it valuable for fuel formulations, while its unique molecular structure makes it useful in academic and industrial research for studying branched hydrocarbon behavior.
How to handle 2,2-dimethylpropane safely?
2,2-dimethylpropane requires careful handling due to its classification as Flammable Gas Category 1. Personnel must wear appropriate PPE including safety goggles, protective gloves, and flame-resistant clothing. Work areas must be well-ventilated and free from ignition sources including sparks, open flames, and hot surfaces. Use explosion-proof electrical equipment and ensure proper grounding of all containers. Emergency procedures should be established, and workers must be trained in gas leak detection and emergency response protocols before handling this substance.
How to store 2,2-dimethylpropane correctly?
2,2-dimethylpropane must be stored in approved pressure vessels designed for flammable gases in cool, well-ventilated areas away from heat sources and ignition points. Storage areas should be equipped with gas detection systems and emergency ventilation. Keep containers upright and secured to prevent tipping. Avoid storage near oxidizing agents and ensure compatibility with container materials. Temperature control is crucial to prevent excessive pressure buildup. Regular inspection of storage vessels and pressure relief systems is essential for safe storage.
What to do in case of contact with 2,2-dimethylpropane?
Immediate evacuation from the exposure area to fresh air is essential if 2,2-dimethylpropane vapors are inhaled. Remove contaminated clothing and flush affected skin with plenty of water for at least 15 minutes. In case of eye contact, rinse thoroughly with water and seek medical attention. If unconsciousness or breathing difficulties occur, provide artificial respiration if trained and seek immediate medical care. Never attempt rescue in confined spaces without proper breathing apparatus. Alert emergency services and provide safety data sheet information to medical personnel.
How to dispose of 2,2-dimethylpropane properly?
2,2-dimethylpropane disposal must comply with local environmental regulations and waste management requirements. The substance should never be released directly into the atmosphere, sewers, or water systems due to its environmental classification as Aquatic Chronic Category 2. Contact licensed hazardous waste disposal companies equipped to handle flammable gases. Small quantities may be safely burned in approved incineration facilities with proper emission controls. Always consult local authorities and follow European waste legislation guidelines for proper disposal procedures.
How to transport 2,2-dimethylpropane?
2,2-dimethylpropane is classified under ADR Class 2 (Gases) for transport purposes. Transportation must comply with dangerous goods regulations using approved pressure containers and vehicles equipped for hazardous gas transport. Proper labeling with GHS pictograms (GHS02, GHS04, GHS09) is mandatory. Transport documents must include emergency response information and contact details. Vehicles should be equipped with appropriate fire extinguishers and emergency equipment. Only trained and certified personnel should handle transportation, following strict routing and timing restrictions where applicable.
Is 2,2-dimethylpropane subject to specific regulations?
2,2-dimethylpropane is regulated under European REACH and CLP regulations, requiring registration and classification as Flammable Gas Category 1, Pressure Gas, and Aquatic Chronic Category 2. It is not currently listed as a Substance of Very High Concern (SVHC). The substance must be labeled with danger signal word and appropriate GHS pictograms. Industrial users must comply with workplace exposure limits and safety data sheet requirements. Environmental release monitoring may be required due to its aquatic toxicity classification under European chemical legislation.
Where to buy 2,2-dimethylpropane in Europe?
2,2-dimethylpropane is available through OYSI, a specialized European distributor of technical chemicals and industrial gases. OYSI provides this substance to qualified industrial customers across Europe, ensuring full regulatory compliance and proper documentation. As a professional chemical distributor, OYSI offers technical support, safety data sheets, and appropriate packaging for industrial applications. Contact OYSI directly to discuss your specific requirements, quantity needs, and delivery options for 2,2-dimethylpropane, ensuring all safety and regulatory requirements are met.
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Data Sources
Classification per CLP Regulation (EC) No 1272/2008. Data from ECHA and PubChem.