Product Overview
We provide Isobutane factory sales for industrial‑grade isobutane, a structural isomer of butane bearing the formula C₄H₁₀. Its molecule adopts a branched configuration, where three methyl groups connect onto one central carbon atom. This flammable industrial gas appears colourless and free of smell; for convenient handling and shipment, it is normally kept in liquefied status under modest pressure.
Belonging to key hydrocarbon materials, isobutane covers multiple practical roles, acting as multi‑purpose foaming additive, cooling refrigerant and fundamental petrochemical feedstock. Thanks to its low‑GWP performance and well‑matched vapour‑pressure characteristics, it stands out as an eco‑conscious alternative across numerous industrial scenarios. Stable product quality and dependable supply of isobutane play a vital part for diverse sectors, stretching from foam fabrication all the way to energy‑related manufacturing.
Basic Information
| CAS No. | 75-28-5 |
| UN No. | UN1969 (Isobutane) or UN1077 (Refrigerant gas R600a) |
| Molecular Formula | C₄H₁₀ (i-C₄H₁₀) |
| Hazard Classification | 2.1 (Flammable gas) |
Key Attributes & Parameters
| Purity | Available in various grades |
| Physical State | Colorless, odorless gas; compressed to a colorless liquid for storage and transport. |
| Boiling Point | -11.7 °C (10.9 °F) at atmospheric pressure. |
| Vapor Pressure (at 21°C) | Approximately 3.1 bar (45 psi) – lower than n-butane. |
| Critical Temperature | 134.7 °C |
| Global Warming Potential (GWP) | ~3 (over 100 years), significantly lower than many traditional hydrofluorocarbon (HFC) refrigerants. |
Features & Advantages
Eco-Friendly Natural Refrigerant
Marketed as the mainstream R600a refrigerant, industrial isobutane features zero ozone depletion potential (ODP) and extremely low global warming potential (GWP). It complies with international environmental protection standards and has become a preferred natural cooling medium widely adopted in modern household refrigeration equipment.
High-Efficiency Foam Blowing Agent
With well-balanced boiling point and vapor pressure characteristics, isobutane serves as an ideal physical blowing agent for XPS extruded polystyrene foam and PU polyurethane foam production. It helps form uniform and dense closed-cell structures, endowing finished foam products with stable and outstanding thermal insulation performance.
Premium Octane Fuel Blending Material
After alkylation reaction with olefin components, isobutane can be converted into high-quality alkylate oil. This clean-burning ingredient boasts high octane value, effectively improving gasoline grade and combustion efficiency, and is widely used in advanced fuel blending.
Core Petrochemical Synthetic Feedstock
Isobutane acts as an essential raw material for downstream petrochemical processing. It can be applied to steam cracking systems to yield ethylene and propylene, and also supports dehydrogenation production procedures to obtain high-purity isobutylene, providing stable raw material support for deep chemical synthesis.
Functional Characteristics
Industrial‑grade isobutane delivers its working performance relying on both volatile liquefied‑gas physical traits and available chemical reactivity. When utilized as a foaming additive, it gets blended together with molten polymer materials. Once exposed to heat input, the substance vaporizes and expands, generating micro‑cells to build up foam structures.
When deployed as R600a refrigerant, it runs within vapor‑compression refrigeration loops. Heat absorption and heat release take place while isobutane shifts between liquid and gaseous phases to realize cooling effects. Thanks to its branched molecular framework, it possesses distinctive physical parameters such as reduced boiling point, setting it apart from normal butane and laying the foundation for its practical performance.
Within petrochemical workflows, it can take part in typical transformation reactions: alkylation reaction together with olefin feedstocks, as well as dehydrogenation processing for manufacturing high‑purity isobutylene. For storage and logistics shipment, isobutane is handled as liquefied gas kept under its self‑generated vapour pressure.
Primary Application Fields
Refrigeration
The dominant use is as the refrigerant R600a in domestic refrigerators, freezers, and some commercial cooling systems.
Foam Production
A key physical blowing agent for extruded polystyrene (XPS) insulation boards and certain polyurethane (PU) foams.
Petrochemicals & Refining
Feedstock for steam crackers, dehydrogenation to isobutylene (for MTBE, butyl rubber), and alkylation to produce high-octane gasoline components.
Aerosol Propellant
Used as a propellant in personal care and technical aerosol products, often blended with other propellants.
Fuel & Energy
Component of liquefied petroleum gas (LPG) and a feedstock for specialty fuels.
Customer Collaboration Case
One large‑scale European producer of energy‑saving household refrigerators intended to upgrade its full product portfolio to refrigerants holding GWP values under 10, in response to strict environmental statutes and growing market expectations from end consumers. R600a isobutane was picked as the most suitable technical option. Even so, the manufacturer was searching for a qualified vendor capable of delivering ultra‑high‑grade purity, stable continuous delivery, and full‑set safety services supporting its worldwide production bases.
We established long‑term strategic cooperation and acted as their exclusive global supplier for isobutane R600a. A closed‑loop supply network utilizing special ISO tank containers was built for this project. We supplied refrigerant‑grade isobutane reaching 99.95% purity with rigorous moisture content management, alongside thorough safety operation training for workers on their assembly shop floors.
Steady deliveries and strict product quality allowed this client to complete production‑line modification without major disruptions. Their home appliances achieved upgraded energy‑efficiency grades and obtained well‑recognized eco‑labels for commercial promotion. This joint project consolidated the client's competitive edge within sustainable home‑appliance production, and also demonstrated how high‑purity isobutane facilitates the global shift toward eco‑friendly cooling technology.
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