Blowing Agent Comparison

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141b 22 134a 245fa 365mfc Pentanes
ODP 0 0.11 0.055 0 0 0 0
GWP 0 725 1810 1430 1030 960 11
VOC Exempt Exempt Exempt Exempt Exempt N/A Yes
MW 60 117 86.5 102 134 150 70 – 72
BPt, C 32 32.2 -40.8 -26.2 10 30 28 – 49
lambda 10.7 10 11 14 12 10.7 11 – 14
Flash Pt, C -19 None None None None None -37 – -51
Sp. Gr. 0.982 1.24 1.19 1.22 1.32 1.28 0.624 – 0.75
Kyoto Compliant Yes No No No No No Yes
Montreal Compliant Yes No No Yes Yes Yes Yes
Vapor Pressure @ 20°C [mmHg] 476 517 7033 4432 923 600 338 – 580
Flammability LEL 5% 7.6% None None None 3.8 1.1% – 1.5%
*Targeted for phase out under Montreal Protocol Guidelines
**Targeted for phase out by the U.S. EPA