EVALUATION OF SUNSCREENING AGENT 93 Table Amerscreen Properties Appearance Odor Molecular weight uv absorption Acid value Hydroxyl value Saponification value (4 hours) Specific gravity @ 80øC Refractive index @ 60øC Moisture Ash Microbiological count when packaged Faint yellow semiliquid (crystalizes on aging) Practically odorless 281 Maximum at 308-311 m/• 1 Maximum 380--400 190-210 1.082 nominal 1.5589 nominal 0.25 per cent maximum 0.25 per cent maximum Less than 10/g Table II Amersereen P Solubility (5 per cent W/W) Ethanol (95 per cent) Ethanol (70 per cent) Ethanol (50 per cent) Isopropyl alcohol Propylene glycol Ethanol, propylene glycol, water (50/20/30) Ethanol, glycerine, water (50/20/30) Castor oil Corn oil Isopropyl myristate Solulan 98 Solulan PB-10 Glycerine Mineral oil, 70 viscosity Water (2.5 per cent) (2.5 per cent) stands for soluble. stands for insoluble.

94 JOURNAL OF THE SOCIETY OF COSMETIC CHEMISTS Figure 6. ULTRAVIOLET ABSORPTION •'ONC-•NTRllT/OIF / 27D 290 310 ULTRAVIOLET ABSORPTION O.• g WA V•Z • N C rN - MI• t•t C•O N ß Figure 7. Figure 8.