D6064-11 – Standard Test Method Technical Guide

ASTM D6064-11 (Reapproved 2022) specifies the requirements for HFC-227ea (1,1,1,2,3,3,3-heptafluoropropane, CF3CHFCF3) as a fire-fighting medium. This standard covers the material properties, testing methods, and safety considerations for this hydrofluorocarbon compound. Below are key details derived from the standard.

📐 Definition and Terminology

HFC-227ea is a hydrofluorocarbon compound with the molecular formula CF3CHFCF3. According to ASRE Standard 34, the designation HFC-227ea encodes the molecular structure: the first digit (2) indicates one less than the number of carbon atoms (3), the second digit (2) indicates one more than the number of hydrogen atoms (1), and the third digit (7) indicates the number of fluorine atoms. The letters ‘e’ and ‘a’ denote the substitution pattern on the central and terminal carbons, respectively.