Kinetics of the thermal decomposition reaction CH2F2 -> CHF + HF was studied by laser absorption measurements in a shock tube. The rate constants were determined by analyzing temporal profiles of HF produced in pyrolysis of CH2F2 over the temperature range 1577-2214 K at pressure of similar to 100 kPa in Ar bath. The results were well reproduced by master equation analysis based on RRKM theory and classical trajectory calculations, which gave the following rate constant expressions: k(infinity) = 2.34 x 10(15) exp(-41,550 K/T) s(-1), k(0) = 5.33 x 10(25) (T/K)(-8.635) exp(-44,190 K/T) cm(3) molecule(-1) s(-1), and F-cent = 0.13. (C) 2018 Elsevier B.V. All rights reserved.