0 2 4 6 8 10 12 0 20 40 60 80 100 120 Aerosol mass (microg/m 3 ) Mass of reacted indene (microg/m 3 ) 0.03 ppm indene 0.06 ppm indene New particle formation from the reactions of ozone with indene and styrene. Larisa L.B. Bracco a , María E. Tucceri a , Alba Escalona b , Yolanda Díaz de Mera b , Alfonso Aranda b* , Ana Mª. Rodríguez c , Diana Rodríguez c . SUPPLEMENTARY MATERIAL 0,0E+00 5,0E+04 1,0E+05 1,5E+05 2,0E+05 2,5E+05 3,0E+05 3,5E+05 4,0E+05 0 20 40 60 80 100 120 140 160 PNbC (#/cm 3 ) Diameter (nm) 10 min 20 min 50 min Fig. S1. Particle size distributions at different times of reaction. Initial concentrations of reagents: indene and SO2: 30ppb. Ozone 60ppb. RH=0. Fig. S2. Mass of formed aerosol versus the mass concentration of reacted indene. Initial concentrations of reagents: SO2 30ppb, Ozone 60ppb, RH=0. Electronic Supplementary Material (ESI) for Physical Chemistry Chemical Physics. This journal is © the Owner Societies 2019