Archives November 4, 2025

Isopentane/Normalpentane Blend 40/60” in a clean warehouse setting, with EPS foam blocks and PU insulation panels in the background. generate a featured image

High-Purity Blowing Agent for EPS & PU: Isopentane/Normal Pentane Blend (40/60)

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

PropertyMethodUnitSpecification
C4 & LighterGas Chromatographywt ppm40 ± 2
C6 & HeavierGas Chromatographywt ppm≤ 20
Saturated GasGas Chromatographywt ppm≤ 100
Unsaturated GasGas Chromatographywt ppmBalance
Non-Volatile MatterASTM D-1353wt ppm≤ 100
n-PentaneGas Chromatographywt %60 ± 2
IsopentaneGas Chromatographywt %40 ± 2
Density (15.6°C)ASTM D-287g/cm³0.62 ± 0.01
Total SulfurASTM D-5453wt ppm≤ 2.0
OdorASTM D-1364wt ppm≤ 100
Chemical FormulaC5H10

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
EPS foam, polyurethane foam, n-pentane, isopentane, and chemical safety

GB/T 22053-2008 Standard Summary for Pentane Blend

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:

Graden-Pentane (%)Isopentane (%)
Fo0100
F11090
F22080
F33070
F44060
F55050
F66040
F77030
FB8020
F99010
F101000

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):
ComponentRetention Value
Isobutane0.368
n-Butane0.531
Isopentane1.000
n-Pentane1.237
n-Hexane2.658
Benzene3.329

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