We measured the first-order loss rate coefficients for CF2O on solid surfaces, ice and HNO2-treated ice, and on sulfuric acid solutions that coated the inside wall of a flow tube. We determined an upper limit for the uptake coefficient, &ggr;, of ~3¿10-6 for CF2O on ice and HNO3-treated ice. A value for &ggr; on a 60% (by weight) sulfuric acid solution of 3(+2/-3)¿10-6 was measured and we observed a higher value over 40% acid, &ggr;=6¿10-5 (¿30%). The loss of CF2O on stratospheric particles is a very slow process and will be insignificant for events that occur on timescales of a year, such as the annual polar chlorine activation phenomena. ¿ American Geophysical Union 1991