How do environmental regulations and the Kigali Amendment affect n-pentane demand in foam blowing?

How do environmental regulations and the Kigali Amendment affect n-pentane demand in foam blowing?
N-pentane and isopentane are gaining traction as blowing agents for EPS and polyurethane foams because they have zero ozone depletion potential and very low global warming potential, making them cost-effective alternatives to HFCs under the Montreal Protocol's Kigali Amendment timeline. Developed countries have begun phasing down high-GWP fluorinated hydrocarbons, while developing nations are also starting their phase-down schedules. This regulatory push aligns with rising demand for building insulation and cold-chain logistics, especially in Asia-Pacific where urbanization is rapid. The global combined market for isopentane and n-pentane reached about 489,673 tonnes in 2025, with an average ex-works price of roughly $1,117 per tonne. Growth is projected at a 2.0-2.2% CAGR through 2032, driven by foam insulation in construction, refrigerators, cold storage, and packaging. However, flammability, VOC emissions, and explosion-proof storage requirements remain operational constraints that favor suppliers offering low-sulfur, low-aromatic, low-moisture, high-purity products with stable blending ratios.