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Pentanes for insulating materials in the cooling industry
Pentanes contribute to efficient cooling and thus energy savings in your application.
Refrigerators and freezers are among the biggest energy consumers in households – running 24/7 without pause. This makes energy efficiency a top priority for appliance manufacturers, and high-quality insulation is the key.
Cyclopentane is the industry standard for efficient, high-performance insulation. As a blowing agent in polyurethane foams, it delivers excellent thermal efficiency with thinner insulation layers – enabling lower energy consumption, reduced CO₂ emissions, and more usable storage volume.
As the world’s largest Cyclopentane producer, Haltermann Carless is your partner and first choice for refrigerator, freezer, and cold-chain applications, from household appliances to refrigerated trailers and warehouses.
Pentane portfolio
for the refrigeration industry

CAS Number: 109-66-0
EC Number: 203-692-4
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CAS Number: 78-78-4
EC Number: 201-142-8
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CAS Number: 287-92-3
EC Number: 206-016-6
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Our ISCC PLUS certified Pentanes for greater sustainability.
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We can offer you Pentane blends in any mixing ratio to meet your particular needs.
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We are pleased to advise you on the best suited Pentane blend for your application.
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LEARN MOREPentane benefits
for cooling appliances
- Excellent insulation performance
- High energy efficiency
- High internal volume possible due to low insulation thickness
- Significant cost savings
- Longevity of food and thus less food waste
Cyclopentan
for high-quality insulation materials
Pentanes from Haltermann Carless offer the insulation and cooling industry optimum possibilities for the production of high-quality insulation materials - this applies in particular to thin-walled insulation applications made of Polyurethane (PU) foam. This is where cyclopentane shows its strength.
For the production of Polyurethane (PU) insulating foam we recommend:
- Cyclopentane PU (min. 95%)
- Cyclopentane IP 85
- Cyclopentane IP 70
Polyurethane foam (PU) systems are characterised by:
- High insulation performance versus low cost - often foamed with Cyclopentane
- Balanced cost/ performance ratio - Cyclopentane in combination with varying proportions of iso-Pentane

Benefit from our
comprehensive service:
We implement our traditional values such as customer focus, individuality and future orientation in all of our business areas. Customer and supplier proximity is particularly important to us. Together we can develop the best possible solutions for all requirements in the paint, coating and adhesive industry.

We are the only European manufacturer of all three isomers, and can offer Pentane blends in all mixing ratios for the building insulation industry.
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Our Speyer site is located in the centre of Europe, with connections to all common means of transport. We supply you worldwide with individual delivery concepts.
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Our modern laboratories permanently control the product quality of our Pentanes through raw material, in-process and final inspections.
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We focus on your needs and offer you Pentane blends of all three isomers (n-Pentane, iso-Pentane, Cyclopentane) in all mixing variants.
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Our Pentane portfolio offers top standard. All products are REACH certified and comply with European regulations. Our certificates speak for themselves.
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We consider ourselves a strong partner at your side and are happy to share our expertise: Download the results of our study on ternary Pentane blends with interesting results especially for the PU and PIR industry.
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