In EPS manufacturing, the blowing‑agent blend directly determines bead expansion behavior, density stability, and final block quality. One of the most common operational questions is whether Isopentane can be blended with n‑Pentane — and what ratio delivers the best results.

Short answer: Yes. Isopentane and n‑Pentane are frequently blended for EPS, typically in 80/20, 75/25, or 70/30 ratios depending on seasonal conditions and density targets.

Why EPS Producers Blend Isopentane and n‑Pentane

The blend works because the two hydrocarbons have complementary boiling points:

• Isopentane — lower boiling point Provides early vapor pressure and faster initial bead expansion. Ideal for warm climates or when rapid pre‑expansion is required.
• n‑Pentane — higher boiling point Offers controlled, sustained expansion, helping maintain bead integrity and preventing over‑expansion.

Together, they create a stable, predictable pre‑expansion window, giving EPS producers tighter control over:

• Bead density
• Cell structure
• Fusion quality
• Cycle time consistency

This is why most EPS plants adjust ratios seasonally:

• 80/20 blend — summer, high ambient temperatures
• 75/25 blend — balanced all‑season performance
• 70/30 blend — cooler seasons, tighter density control

Risks of Improper Blending

Incorrect ratios or poorly mixed pentane can cause serious production issues:

• Bead collapse from excessive vapor pressure
• Poor surface finish due to uneven cell formation
• Density inconsistency across batches
• Longer cycle times caused by unstable expansion curves

Even small ratio deviations can shift the expansion profile enough to affect block quality.

Why Many EPS Plants Prefer Pre‑Blended Pentane

To eliminate variability, many manufacturers rely on pre‑blended pentane mixes produced under controlled conditions. This ensures:

• Accurate ratio consistency
• Tight boiling‑range control
• Low oxygen and CO₂ content
• Uniform expansion behavior across batches

Our Pentane Solutions for EPS Producers

We supply high‑purity, pre‑blended pentane formulations engineered specifically for EPS applications:

• Standard blends: 80/20, 75/25, 70/30
• Custom ratios available
• ISO‑tank, IBC, or drum delivery
• Batch‑tested for boiling range, purity, and expansion performance

If your EPS line requires stable density, clean surface finish, and predictable expansion, our blends are designed to deliver consistent results.

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Introduction

High‑purity Isopentane is a critical hydrocarbon used in EPS foam production, geothermal ORC systems, specialty refrigerant blends, and laboratory solvent applications. For procurement teams and R&D engineers, securing consistent quality and dependable bulk Isopentane supply is essential to maintaining operational stability. As demand for efficient blowing agents and low‑boiling hydrocarbons increases, partnering with a certified Isopentane manufacturer becomes a key strategic decision.

Core Data: Technical Specifications

Parameter	Specification
Chemical Name	Isopentane (2‑Methylbutane)
CAS Number	78‑78‑4
Molecular Formula	C5H12
Appearance	Colorless, volatile liquid
Purity Levels	Industrial grades: 95%, 98%; high‑purity grades available upon request

Chemical Properties & Industrial Benefits

Volatility and Boiling Point

With a boiling point near 27–28°C, Isopentane offers rapid vaporization and controlled expansion, making it highly effective as a blowing agent for EPS and PU foam systems. This ensures uniform cell structure, improved insulation performance, and predictable processing behavior.

Low Density and Solvency

Its low density and favorable solvency characteristics support applications in laboratory extraction, hydrocarbon blending, and refrigerant formulation. These properties provide buyers with stable evaporation profiles and compatibility across diverse industrial processes.

Thermal Stability

Isopentane’s reliable thermal behavior under controlled conditions makes it suitable for geothermal ORC cycles, where consistent vaporization is essential for efficient energy conversion.

Procurement & Logistics Safety

International buyers sourcing high‑purity Isopentane must ensure compliance with global transport and safety regulations. Due to its flammability and volatility, Isopentane is commonly shipped in:

• ISO tanks for large‑volume industrial consumption
• Steel drums for mid‑size or batch requirements
• Secure, UN/DOT‑compliant containers for safe handling and transit

Proper grounding, ventilation, and temperature‑controlled storage are required to maintain product integrity throughout transportation and on‑site usage.

Conclusion & B2B Call‑to‑Action

For procurement managers and technical teams evaluating Isopentane CAS 78‑78‑4 sourcing options, working with a certified supplier ensures consistent purity, safe logistics, and tailored blending solutions. Contact the sales team to request a quotation, obtain TDS/MSDS documentation, or discuss customized purity specifications aligned with your production requirements.

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Why You’re Searching for Today’s Isopentane Price

Global buyers are actively checking Isopentane CFR / FOB pricing because the market is shifting faster than usual. Crude oil volatility, regional supply‑demand changes, and fluctuating freight conditions mean any fixed online price is outdated the moment it’s posted. If you need a reliable number, only a live quotation reflects the real market.

CFR vs FOB: How Each Impacts Your Final Cost

FOB (Free on Board)

• You handle freight, insurance, and risk once the cargo is loaded.
• Ideal for buyers with strong logistics networks or multi‑port consolidation strategies.

CFR (Cost and Freight)

• Supplier manages freight to your destination port.
• Suitable for buyers who want predictable landed cost and simplified logistics.

Your final cost depends on:

• Vessel availability
• Seasonal freight rates
• Port congestion
• Hazardous cargo handling fees
• Regional demand for C5 hydrocarbons

This is why static online prices are misleading—they ignore real‑time freight and market dynamics.

Why Industrial Buyers Choose Us for Isopentane Supply

High Purity Grades (95%–99%)

Consistent quality for PU foam, refrigerants, lab solvents, and specialty chemical applications.

Stable Supply Chain

Long‑term production partnerships ensure dependable monthly and quarterly allocations.

Flexible Shipping Options

ISO tanks, drums, FCL/LCL, and multi‑grade shipments to match your logistics strategy.

Strict Quality Control

COA, MSDS, and batch‑level QC aligned with international standards.

Global CFR / FOB Coverage

Reliable delivery to Asia, Middle East, Europe, Africa, and the Americas.

Request a Live Quote — Get Today’s Actual CFR / FOB Price

Because Isopentane pricing changes quickly, your exact cost depends on:

• Destination port
• Required purity
• Packaging type
• Shipment volume
• Preferred Incoterm (CFR or FOB)

Call to Action

Request a Live Quote or contact our sourcing team with your destination port to receive an accurate CFR / FOB price tailored to your shipment.

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Understanding Isopentane Synonyms for Global Procurement and Documentation

Systematic Name (IUPAC)

• 2‑Methylbutane

Common Names

• Isopentane
• Methylbutane
• iso‑Pentane
• iso‑C5H12

Other Synonyms

• Ethyldimethylmethane
• Isoamyl hydride
• 1,1‑Dimethylpropane
• 1,1,2‑Trimethylethane
• Exxsol Isopentane S (trade name)

Related Isomers

• n‑Pentane
• Neopentane (2,2‑Dimethylpropane)

Technical Data

Property	Value
CAS Number	78‑78‑4
Formula	C₅H₁₂
Boiling Point	~27.8 °C
Appearance	Colorless liquid

Why Synonyms Matter in Trade

• Regulatory compliance: Different agencies may list Isopentane under varying synonyms.
• Buyer communication: Procurement managers often recognize “iso‑Pentane” more readily than “2‑Methylbutane.”

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FAQ – Pentane Blend 70/30

Pentane Blend 70/30 is a mixture of n-Pentane and Isopentane in a 70:30 ratio, commonly used as a blowing agent or solvent in industrial applications.

It is widely applied in polyurethane foam production, solvent formulations, and as a chemical intermediate.

The blend contains high-purity components, typically above 95–99% hydrocarbon content.

Packaging options include ISO tanks, drums, or bulk shipment according to customer needs.

It is flammable; handle with proper safety measures, including ventilation and PPE.

The n-Pentane to Isopentane ratio can be customized to suit specific requirements.

Ensuring process stability and low-impurity performance for precision chemical applications

In a fine chemical R&D project, a company faced challenges with solvent impurities affecting product stability. To ensure research efficiency and process reliability, they selected our Isopentane 99% and Pentane series products.

Product Specifications:

• Isopentane: 99%
• n-Pentane: per batch records
• Cyclopentane: <100 ppm
• Heavy components: <100 ppm
• Light components: <0.5%
• Benzene: <10 ppm
• Total sulfur: <1 ppm
• Non-volatile matter: <1 mg/100 ml

After using this batch, the R&D team observed significantly improved solvent system stability and effective control of impurities, making the overall process smoother. The team commented, “The high purity and low impurity Pentane series greatly reduced process uncertainty, which is exactly the quality assurance we needed.”

Case Summary:
The high-purity Pentane series not only meets strict specification requirements but also provides reliable process support for fine chemical, electronic materials, and precision applications.

Estimated reading time: 2 minutes

High-Purity Pentane Portfolio – Reliable, Efficient, and Sustainable

Our Pentane range is developed to deliver consistent quality and optimized performance across multiple industrial applications. With high purity levels and narrow boiling ranges, these Pentanes ensure reliability, efficiency, and environmental compliance in every use.

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1. Product Overview

We offer a complete series of Pentane grades designed to meet diverse process requirements:

Product	Purity (%)	Boiling Range (°C)	Flash Point (°C)	Key Applications
n-Pentane 99%	≥99.0	35–36	-40	Polyurethane rigid foam blowing agent, solvent
Isopentane 99%	≥99.0	27–29	-51	Quick-foaming systems, refrigerant blends
Pentane Blend 80/20 (n-/iso-)	≥99.0	30–35	-45	Balanced foam expansion, insulation boards
Pentane Blend 50/50 (n-/iso-)	≥99.0	28–34	-47	General-purpose polyurethane systems
Pentane Blend (Cyclo/Isopentane)	≥99.0	28–37	-40	Low-conductivity, CFC-free insulation foam

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2. Key Technical Features

• High Purity: Up to 99% for stable and reproducible foam performance.
• Low Sulphur Content: Ensures catalyst protection and cleaner reactions.
• Optimized Volatility: Custom boiling ranges to control foaming speed and cell structure.
• Excellent Compatibility: Suitable for polyol systems and refrigerant formulations.
• Eco-Friendly: Non-ozone depleting alternative to traditional CFCs and HCFCs.

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3. Safety & Handling

All Pentane products are classified as highly flammable liquids and vapors.

• Store in a cool, well-ventilated area, away from ignition sources.
• Use closed systems for handling and transfer.
• Ensure compliance with REACH and GHS standards.

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4. Applications

• Polyurethane Insulation Foams: Rigid foam for construction and appliance insulation.
• Refrigeration Systems: Used as components in hydrocarbon refrigerant blends.
• Solvent Applications: Precision cleaning and polymer processing.
• Custom Formulations: Tailor-made Pentane Blends for controlled evaporation rates.

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5. Packaging Options

• ISO Tanks (15.5MT each) for bulk international shipments.
• Drums (125kg net) for smaller-scale customers or sampling purposes.

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• Isopentane

This high-purity hydrocarbon blend—composed of 40% Isopentane and 60% Normal Pentane—is specifically formulated as a blowing agent for EPS and PU foam applications. It offers excellent volatility, controlled density, and minimal sulfur content, ensuring clean expansion and stable foam structure. The product is manufactured under strict quality protocols and verified by ASTM and gas chromatography methods.

Applications

• Expandable Polystyrene (EPS) foam production
• Polyurethane (PU) foam systems
• Insulation materials requiring low boiling point blowing agents

Advantages

• Consistent composition: 40% Isopentane / 60% Normalpentane ±2%
• Low total sulfur: ≤2.0 wt ppm
• Minimal non-volatile residue: ≤100 wt ppm
• Optimized density: 0.62 ± 0.01 g/cm³
• Verified by ASTM D-287, D-5453, D-1353, and D-1364 standards
• Excellent compatibility with EPS and PU formulations

Technical Specifications

Property	Method	Unit	Specification
C4 & Lighter	Gas Chromatography	wt ppm	40 ± 2
C6 & Heavier	Gas Chromatography	wt ppm	≤ 20
Saturated Gas	Gas Chromatography	wt ppm	≤ 100
Unsaturated Gas	Gas Chromatography	wt ppm	Balance
Non-Volatile Matter	ASTM D-1353	wt ppm	≤ 100
n-Pentane	Gas Chromatography	wt %	60 ± 2
Isopentane	Gas Chromatography	wt %	40 ± 2
Density (15.6°C)	ASTM D-287	g/cm³	0.62 ± 0.01
Total Sulfur	ASTM D-5453	wt ppm	≤ 2.0
Odor	ASTM D-1364	wt ppm	≤ 100
Chemical Formula	—	—	C5H10

Primary Keyphrase: Isopentane/Normalpentane Blowing Agent

Synonym Variants:

• Pentane Blend Blowing Agent
• Hydrocarbon Foam Expander
• EPS/PU Blowing Solution
• Volatile Organic Blowing Agent
• C5 Hydrocarbon Blend
• Foam Expansion Agent
• Pentane-Based Propellant
• Polyurethane Foam Expander
• Expandable Polystyrene Agent
• Low-Boiling Point Blowing Agent

The GB/T 22053-2008 standard summary for Pentane Vesicant:

• Standard Number: GB/T 22053-2008
• Chinese Title: 戊烷发泡剂
• English Title: Pentane Vesicant
• Scope:
  • Applies to pentane vesicant refined by distillation from pentane-containing raw materials
  • Primarily used as a blowing agent in expandable polystyrene and flexible polyurethane production
  • Also applicable as a chemical or laboratory solvent

Chemical Information

• Molecular Formula: C₅H₁₂
• Relative Molecular Mass: 72.15 (based on 2001 international atomic weights)

Grades and Composition

Pentane vesicant consists of n-pentane (nCs) and isopentane (iCs), available in 11 grades:

Grade	n-Pentane (%)	Isopentane (%)
Fo	0	100
F1	10	90
F2	20	80
F3	30	70
F4	40	60
F5	50	50
F6	60	40
F7	70	30
FB	80	20
F9	90	10
F10	100	0

Note: nCs and iCs content may vary within ±5% based on demand.

Technical Requirements

• Appearance: Clear, colorless liquid with no turbidity
• Relative Retention Values (selected components):

Component	Retention Value
Isobutane	0.368
n-Butane	0.531
Isopentane	1.000
n-Pentane	1.237
n-Hexane	2.658
Benzene	3.329

Inspection Rules

• Types of Inspection:
  • Factory Inspection: Conducted by the manufacturer’s quality department; includes total pentane content and C6+ components
  • Type Inspection: Covers all parameters; performed at least once per month during normal production
• Acceptance: Must be completed within 15 days of receipt by the user
• Sampling: As per SY/T 0543
• Judgment: Based on GB/T 1250 rounding comparison method; if any parameter fails, retest from double units. If retest fails, the batch is rejected.

Labeling, Packaging, Transport, Storage

• Labeling:
  • Must include product name, trademark, grade, manufacturer name and address, net weight, batch number, standard code, and “flammable” symbol per GB 190
• Packaging:
  • Filling coefficient for tankers or containers must not exceed 0.85
• Transport:
  • Ensure ventilation, avoid impact, dragging, direct sunlight, and open flames; comply with national hazardous goods transport regulations
• Storage:
  • Separate from oxygen, compressed air, oxidizers
  • Avoid heat sources, sunlight, rain
  • Display “No Smoking/Fire” signs, implement fire/explosion protection measures, and equip with appropriate fire extinguishers

Safety Information

• Physical Hazards:
  • Highly flammable; vapor forms explosive mixtures with air
  • Vapor is heavier than air and may travel to ignition sources
• Health Hazards:
  • Low toxicity
  • High concentrations may irritate eyes and respiratory tract, cause anesthesia or unconsciousness
  • Chronic exposure may lead to mild dermatitis and mucosal irritation
  • Protective equipment required in high-concentration environments

Referenced Standards (selected)

• GB/T 259 – Determination of water-soluble acids and bases in petroleum products
• GB/T 1250 – Rounding and judgment methods for limit values
• SH 0164 – Packaging, storage, and delivery rules for petroleum products
• SY/T 0542 – Gas chromatography method for light hydrocarbon components
• SY/T 0543 – Sampling method for stable light hydrocarbons