Vogel-Fulcher-Tammann equation. 118 Shown in Fig. is the resulting parameterization as a function of both RH and temperature determined using this method. A liquid, semisolid, and amorphous solid phase state (i.e. glassy phase state) have a viscosity of < 10 2 Pa s, 10 2 -10 12 Pa s, and > 10 12 Pa s, respectively. The viscosity of guaiacol-NO 3 SOA (Fig. ) is largely independent of the RH between 0 to 80% at all temperatures. For temperatures less than 270 K and RH lower than 80%, the guaiacol-NO 3 SOA is in a glassy phase state (viscosity > 10 12 Pa s). In contrast, the guaiacol-OH SOA (Fig. ) is strongly dependent on both RH and temperature and only forms a glassy phase state when both the temperature and RH are low.